51
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Mohammadzadeh M, Honarvar M, Zarei AR, Mashhadi Akbar Boojar M, Bakhoda H. A new approach for separation and recovery of betaine from beet molasses based on cloud point extraction technique. Journal of Food Science and Technology 2018; 55:1215-1223. [PMID: 29606736 DOI: 10.1007/s13197-017-2999-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/13/2017] [Accepted: 12/18/2017] [Indexed: 11/27/2022]
Abstract
The aim of this work was to explore the possibility of the application of cloud point extraction (CPE) method in micelle media to recovery betaine from beet molasses. Response surface method was employed to assess the effects of surfactant concentration, molasses concentration, incubation time, pH, electrolyte concentration, mixing time, and surfactant type on efficiency of betaine recovery from beet molasses. Also, a mathematical model was developed to predict the effect of each variable and their interactions on the efficiency of betaine recovery. The model showed that best surfactant was Triton X-114 and under the optimum conditions, betaine recovery from beet molasses was achieved up to 80% when three CPE steps with total of 1.5% (w/v) of surfactant were used. Subsequently, betaine was recovered nearly 100% from surfactant rich phase after adjusting pH at 2.5 and re-incubation at 40 °C. The results showed that the proposed method is suitable for extraction of betaine from beet molasses.
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Affiliation(s)
- Mozhgan Mohammadzadeh
- 1Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Masoud Honarvar
- 1Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Ali Reza Zarei
- 2Faculty of Chemistry and Chemical Engineering, MalekAshtar University of Technology, Tehran, Iran
| | | | - Hossein Bakhoda
- 4Department of Agricultural Mechanization, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran
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52
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Naqvi AZ, Kabir-Ud-Din. Clouding phenomenon in amphiphilic systems: A review of five decades. Colloids Surf B Biointerfaces 2018; 165:325-344. [PMID: 29547842 DOI: 10.1016/j.colsurfb.2018.01.060] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 11/26/2022]
Abstract
Phase separation in amphiphilic systems is an important phenomenon. The temperature at which an amphiphilic solution phase separates is known as Cloud Point (CP). This article reviews in detail the process of phase separation in various amphiphiles (surfactants, polymers and drugs) and effect of different classes of additives on the CP of these amphiphilic systems. Ions affect the CP of drugs in a different way: kosmotropes and hard bases decrease while chaotropes and soft bases increase the CP of nonionic and cationic surfactants. Anionic surfactants show CP in presence of quaternary salts only. Thus, depending upon the nature and concentration of additive, the CP of an amphiphilic system gets increased or decreased and, hence, properties of the system may be tuned as per the need and use. A system with CP at high concentration can be made to phase separate at lower concentration by simply introducing an appropriate additive in it. This makes the system cost effective. On the other hand, if not required, a low CP can be enhanced with the help of another type of a suitable additive.
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Affiliation(s)
- Andleeb Z Naqvi
- Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India.
| | - Kabir-Ud-Din
- Department of Chemistry, Faculty of Natural Sciences, Arba Minch University, Arba Minch, Ethiopia
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53
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Kori S, Parmar A, Goyal J, Sharma S. Cloud point extraction coupled with microwave-assisted back-extraction (CPE-MABE) for determination of Eszopiclone (Z-drug) using UV–Visible, HPLC and mass spectroscopic (MS) techniques: Spiked and in vivo analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1074-1075:129-138. [DOI: 10.1016/j.jchromb.2018.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/28/2017] [Accepted: 01/04/2018] [Indexed: 10/18/2022]
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54
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Ritter E, Smirnova I. Continuous Countercurrent Extractive Biocatalysis in Aqueous Surfactant Two-Phase Systems. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201700054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eric Ritter
- Hamburg University of Technology; Institute of Thermal Separation Processes; Eissendorfer Straße 38 21073 Hamburg Germany
| | - Irina Smirnova
- Hamburg University of Technology; Institute of Thermal Separation Processes; Eissendorfer Straße 38 21073 Hamburg Germany
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55
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Park KC, Tateno H, Tsukahara T. Solid phase extraction based on the phase transition of poly( N-isopropylacrylamide): the extraction behaviour of lanthanide( iii) ions in highly acidic solutions. REACT CHEM ENG 2018. [DOI: 10.1039/c7re00060j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The extraction of the complex of Ln(iii) ions and CMPO onto the PNIPAAm solid phase formed by phase transition was achieved in highly acidic solutions.
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Affiliation(s)
- Ki Chul Park
- Laboratory for Advanced Nuclear Energy
- Institute of Innovative Research in Tokyo Institute of Technology
- Tokyo
- Japan
| | - Haruka Tateno
- Laboratory for Advanced Nuclear Energy
- Institute of Innovative Research in Tokyo Institute of Technology
- Tokyo
- Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy
- Institute of Innovative Research in Tokyo Institute of Technology
- Tokyo
- Japan
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56
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Arkhipov VP, Filippov A. The cloud point of aqueous solutions of ethoxylated monoalkylphenols in the individual state and in the presence of electrolytes. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1413656] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Victor P. Arkhipov
- Department of Physics, Kazan National Research Technological University, Kazan, Russia
| | - Andrei Filippov
- Institute of Physics, Kazan Federal University, Kazan, Russia
- Chemistry of Interfaces, Luleå University of Technology, Luleå, Sweden
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57
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Erarpat S, Özzeybek G, Chormey DS, Erulaş F, Turak F, Bakırdere S. A novel liquid-liquid extraction for the determination of naphthalene by GC-MS with deuterated anthracene as internal standard. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:528. [PMID: 28963642 DOI: 10.1007/s10661-017-6250-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 09/21/2017] [Indexed: 06/07/2023]
Abstract
Polycyclic aromatic hydrocarbons are known for their carcinogenic and mutagenic effects on human health. This therefore calls for the regulation of their concentrations in air, water, and soil. Naphthalene as the simplest in structure of the polycyclic aromatic hydrocarbons is mainly used as a starter material for other chemicals but also has impacts on human health. A method is therefore proposed for the determination of naphthalene in water samples by gas chromatography mass spectrometry after liquid-liquid extraction. The extraction method was optimized to improve the extraction output, thereby lowering the limit of detection. The limits of detection and quantification obtained for naphthalene were 4.4 and 14.6 ng mL-1, respectively. Deuterated anthracene was used as internal standard to enhance the precision of the method, for which a relative standard deviation of 4.3% was obtained. The percent recovery of naphthalene obtained from tap water was ranged between 93.8 and 102.2.
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Affiliation(s)
- Sezin Erarpat
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey
| | - Gözde Özzeybek
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey
| | - Dotse Selali Chormey
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey
| | - Fatih Erulaş
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey
- Faculty of Education, Department of Science Education, Siirt University, 56100, Siirt, Turkey
| | - Fatma Turak
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey
| | - Sezgin Bakırdere
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, 34210, İstanbul, Turkey.
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58
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Sakai T, Nakagawa Y, Iijima K. Hexadecane-in-water emulsions as thermal-energy storage and heat transfer fluids: Connections between phase-transition temperature and period of hexadecane droplets dispersed in hexadecane-in-water emulsions and characteristics of surfactants. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.06.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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59
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Nadar SS, Pawar RG, Rathod VK. Recent advances in enzyme extraction strategies: A comprehensive review. Int J Biol Macromol 2017; 101:931-957. [DOI: 10.1016/j.ijbiomac.2017.03.055] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/07/2017] [Accepted: 03/10/2017] [Indexed: 12/19/2022]
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60
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Pharr DY. Green analytical chemistry – the use of surfactants as a replacement of organic solvents in spectroscopy. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2017-0006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThis chapter gives an introduction to the many practical uses of surfactants in analytical chemistry in replacing organic solvents to achieve greener chemistry. Taking a holistic approach, it covers some background of surfactants as chemical solvents, their properties and as green chemicals, including their environmental effects. The achievements of green analytical chemistry with micellar systems are reviewed in all the major areas of analytical chemistry where these reagents have been found to be useful.
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61
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Pan T, Liu C, Zeng X, Xin Q, Xu M, Deng Y, Dong W. Biotoxicity and bioavailability of hydrophobic organic compounds solubilized in nonionic surfactant micelle phase and cloud point system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:14795-14801. [PMID: 28470500 DOI: 10.1007/s11356-017-9076-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 04/21/2017] [Indexed: 06/07/2023]
Abstract
A recent work has shown that hydrophobic organic compounds solubilized in the micelle phase of some nonionic surfactants present substrate toxicity to microorganisms with increasing bioavailability. However, in cloud point systems, biotoxicity is prevented, because the compounds are solubilized into a coacervate phase, thereby leaving a fraction of compounds with cells in a dilute phase. This study extends the understanding of the relationship between substrate toxicity and bioavailability of hydrophobic organic compounds solubilized in nonionic surfactant micelle phase and cloud point system. Biotoxicity experiments were conducted with naphthalene and phenanthrene in the presence of mixed nonionic surfactants Brij30 and TMN-3, which formed a micelle phase or cloud point system at different concentrations. Saccharomyces cerevisiae, unable to degrade these compounds, was used for the biotoxicity experiments. Glucose in the cloud point system was consumed faster than in the nonionic surfactant micelle phase, indicating that the solubilized compounds had increased toxicity to cells in the nonionic surfactant micelle phase. The results were verified by subsequent biodegradation experiments. The compounds were degraded faster by PAH-degrading bacterium in the cloud point system than in the micelle phase. All these results showed that biotoxicity of the hydrophobic organic compounds increases with bioavailability in the surfactant micelle phase but remains at a low level in the cloud point system. These results provide a guideline for the application of cloud point systems as novel media for microbial transformation or biodegradation.
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Affiliation(s)
- Tao Pan
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China.
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong, Guangzhou, 510070, People's Republic of China.
- National engineering research center for ionic rare earth, Ganzhou, 341000, People's Republic of China.
| | - Chunyan Liu
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China
| | - Xinying Zeng
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China
| | - Qiao Xin
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China
| | - Meiying Xu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong, Guangzhou, 510070, People's Republic of China
| | - Yangwu Deng
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China
- National engineering research center for ionic rare earth, Ganzhou, 341000, People's Republic of China
| | - Wei Dong
- Jiangxi Key Laboratory of Mining and Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China
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62
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The peculiarities of the interphase distribution of amino acids in the cloud point extraction systems. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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63
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Ritter E, Racheva R, Jakobtorweihen S, Smirnova I. Influence of d -glucose as additive on thermodynamics and physical properties of aqueous surfactant two-phase systems for the continuous micellar extraction. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.02.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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64
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Yadav SK, Kumar S. Counterion-specific clouding in aqueous anionic surfactant: a case of Hofmeister-like series. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4074-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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65
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Tan GYT, Zimmermann W, Lee KH, Lan JCW, Yim HS, Ng HS. Recovery of mangostins from Garcinia mangostana peels with an aqueous micellar biphasic system. FOOD AND BIOPRODUCTS PROCESSING 2017. [DOI: 10.1016/j.fbp.2016.12.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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66
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Gondim TA, Guedes JAC, Ribeiro LPD, Lopes GS, Matos WO. Optimization of a cloud point extraction procedure with response surface methodology for the quantification of dissolved iron in produced water from the petroleum industry using FAAS. MARINE POLLUTION BULLETIN 2017; 114:786-791. [PMID: 27837910 DOI: 10.1016/j.marpolbul.2016.10.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/19/2016] [Accepted: 10/31/2016] [Indexed: 06/06/2023]
Abstract
The characterization of inorganic elements in the produced water (PW) samples is a difficult task because of the complexity of the matrix. This work deals with a study of a methodology for dissolved Fe quantification in PW from oil industry by flame atomic absorption spectrometry (FAAS) after cloud point extraction (CPE). The procedure is based on the CPE using PAN as complexing agent and Triton X-114 as surfactant. The best conditions for Fe extraction parameters were studied using a Box-Behnken design. The proposed method presented a LOQ of 0.010μgmL-1 and LOD of 0.003μgmL-1. The precision of the method was evaluated in terms of repeatability, obtaining a coefficient of variation of 2.54%. The accuracy of the method was assessed by recovery experiments of Fe spiked that presented recovery of 103.28%. The method was applied with satisfactory performance to determine Fe by FAAS in PW samples.
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Affiliation(s)
- Tamyris A Gondim
- Laboratório de Estudos em Química Aplicada, Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970, Fortaleza, CE, Brazil
| | - Jhonyson A C Guedes
- Laboratório de Estudos em Química Aplicada, Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970, Fortaleza, CE, Brazil
| | - Livia P D Ribeiro
- Universidade da Integração Internacional da Lusofonia Afro-brasileira, Campus dos Palmares, Km 51, 62.785-000, Acarape, CE, Brazil
| | - Gisele S Lopes
- Laboratório de Estudos em Química Aplicada, Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970, Fortaleza, CE, Brazil
| | - Wladiana O Matos
- Laboratório de Estudos em Química Aplicada, Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970, Fortaleza, CE, Brazil.
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67
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Preparation and characterization of blended cloves/cinnamon essential oil nanoemulsions. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.08.046] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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68
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Zhao W, Wang Y. Coacervation with surfactants: From single-chain surfactants to gemini surfactants. Adv Colloid Interface Sci 2017; 239:199-212. [PMID: 27260407 DOI: 10.1016/j.cis.2016.04.005] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
Abstract
Coacervation is a spontaneous process during which a colloidal dispersion separates into two immiscible liquid phases: a colloid-rich liquid phase in equilibrium with a diluted phase. Coacervation is usually divided into simple coacervation and complex coacervation according to the number of components. Surfactant-based coacervation normally contains traditional single-chain surfactants. With the development of surfactants, gemini surfactants with two amphiphilic moieties have been applied to form coacervation. This review summarizes the development of simple coacervation and complex coacervation in the systems of single-chain surfactants and gemini surfactants. Simple coacervation in surfactant solutions with additives or at elevated temperature and complex coacervation in surfactant/polymer mixtures by changing charge densities, molecular weight, ionic strength, pH, or temperature are reviewed. The comparison between gemini surfactants and corresponding monomeric single-chain surfactants reveals that the unique structures of gemini surfactants endow them with higher propensity to generate coacervation.
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69
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Cloud point extraction utilizable for separation and preconcentration of (ultra)trace elements in biological fluids before their determination by spectrometric methods: a brief review. CHEMICAL PAPERS 2016. [DOI: 10.1007/s11696-016-0014-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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70
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de Prá Urio R, Masini JC. Determination of Simazine and Atrazine in River Water by Cloud-Point Extraction and High-Performance Liquid Chromatography. ANAL LETT 2016. [DOI: 10.1080/00032719.2016.1212203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ricardo de Prá Urio
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Jorge Cesar Masini
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
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71
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Mixed micelle-mediated extraction approach for matrix elimination and separation of some rare earth elements. Microchem J 2016. [DOI: 10.1016/j.microc.2016.02.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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72
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Shokrollahi A, Kashkoli FD. Determination of Violet Covasol as a cosmetic dye in water samples by a CPE-Scanometry method. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.01.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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73
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Naeemullah, Kazi TG, Tuzen M. Development of novel simultaneous single step and multistep cloud point extraction method for silver, cadmium and nickel in water samples. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2015.12.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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74
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Ji X, Tian M, Wang Y. Temperature-Induced Aggregate Transitions in Mixtures of Cationic Ammonium Gemini Surfactant with Anionic Glutamic Acid Surfactant in Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:972-981. [PMID: 26750978 DOI: 10.1021/acs.langmuir.5b04211] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The aggregation behaviors of the mixtures of cationic gemini surfactant 1,4-bis(dodecyl-N,N-dimethylammonium bromide)-2,3-butanediol (C12C4(OH)2C12Br2) and anionic amino acid surfactant N-dodecanoylglutamic acid (C12Glu) in aqueous solution of pH = 10.0 have been studied. The mixture forms spherical micelles, vesicles, and wormlike micelles at 25 °C by changing mixing ratios and/or total surfactant concentration. Then these aggregates undergo a series of transitions upon increasing the temperature. Smaller spherical micelles transfer into larger vesicles, vesicles transfer into solid spherical aggregates and then into larger irregular aggregates, and entangled wormlike micelles transfer into branched wormlike micelles. Moreover, the larger irregular aggregates and branched micelles finally lead to precipitation and clouding phenomenon, respectively. All these transitions are thermally reversible, and the transition temperatures can be tuned by varying the mixing ratios and/or total concentration. These temperature-dependent aggregate transitions can be elucidated on the basis of the temperature-induced variations in the dehydration, electrostatic interaction, and hydrogen bonds of the headgroup area and in the hydrophobic interaction between the hydrocarbon chains. The results suggest that the surfactants carrying multiple binding sites will greatly improve the regulation ability and temperature sensitivity.
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Affiliation(s)
- Xiuling Ji
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Maozhang Tian
- State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration & Development , Beijing 100083, People's Republic of China
| | - Yilin Wang
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
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75
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Naeemullah, Kazi TG, Afridi HI, Shah F, Arain SS, Brahman KD, Ali J, Arain MS. Simultaneous determination of silver and other heavy metals in aquatic environment receiving wastewater from industrial area, applying an enrichment method. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2014.10.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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76
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Doroschuk VO, Grogul AB, Mandzyuk YS, Makukha OG, Grytsyk NO. Cloud point extraction of disulfiram for its HPLC-MS/MS determination in synthetic urine. CHEMICAL PAPERS 2016. [DOI: 10.1515/chempap-2016-0074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractA new simple cloud point extraction/preconcentration method was developed for the HPLC-MS/MS determination of disulfiram in synthetic urine. Some parameters with an effect on the extraction, such as the concentration of Triton X-114, pH influence, incubation time, equilibration temperature and centrifuging parameters, were studied and optimised. The method proposed for the HPLC-MS/MS determination of disulfiram in synthetic urine with preliminary cloud point extraction was validated. The calibration curve was linear in the range of 0.025-15.4 ng mL
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77
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Zain NNM, Abu Bakar NK, Mohamad S. Cloud point extraction of 2,4−dichlorophenol from aqueous samples employing β−cyclodextrin. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2015.1119852] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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78
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Melnyk A, Namieśnik J, Wolska L. Theory and recent applications of coacervate-based extraction techniques. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.03.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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79
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Cloud point extraction studies on recovery of nickel(II) from highly saline sulfate medium using salicylideneaniline mono-Schiff base chelating extractant. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.05.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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80
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Rusinek CA, Bange A, Papautsky I, Heineman WR. Cloud Point Extraction for Electroanalysis: Anodic Stripping Voltammetry of Cadmium. Anal Chem 2015; 87:6133-40. [PMID: 25996561 PMCID: PMC4889431 DOI: 10.1021/acs.analchem.5b00701] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cloud point extraction (CPE) is a well-established technique for the preconcentration of hydrophobic species from water without the use of organic solvents. Subsequent analysis is then typically performed via atomic absorption spectroscopy (AAS), UV-vis spectroscopy, or high performance liquid chromatography (HPLC). However, the suitability of CPE for electroanalytical methods such as stripping voltammetry has not been reported. We demonstrate the use of CPE for electroanalysis using the determination of cadmium (Cd(2+)) by anodic stripping voltammetry (ASV). Rather than using the chelating agents which are commonly used in CPE to form a hydrophobic, extractable metal complex, we used iodide and sulfuric acid to neutralize the charge on Cd(2+) to form an extractable ion pair. This offers good selectivity for Cd(2+) as no interferences were observed from other heavy metal ions. Triton X-114 was chosen as the surfactant for the extraction because its cloud point temperature is near room temperature (22-25 °C). Bare glassy carbon (GC), bismuth-coated glassy carbon (Bi-GC), and mercury-coated glassy carbon (Hg-GC) electrodes were compared for the CPE-ASV. A detection limit for Cd(2+) of 1.7 nM (0.2 ppb) was obtained with the Hg-GC electrode. ASV with CPE gave a 20x decrease (4.0 ppb) in the detection limit compared to ASV without CPE. The suitability of this procedure for the analysis of tap and river water samples was demonstrated. This simple, versatile, environmentally friendly, and cost-effective extraction method is potentially applicable to a wide variety of transition metals and organic compounds that are amenable to detection by electroanalytical methods.
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Affiliation(s)
- Cory A. Rusinek
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221-0172, USA
| | - Adam Bange
- Department of Chemistry, Xavier University, Cincinnati, OH 45207-4221, USA
| | - Ian Papautsky
- BioMicrosystems Lab, Department of Electrical Engineering and Computing Systems, University of Cincinnati, Cincinnati, OH 45221-0030, USA
| | - William R. Heineman
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221-0172, USA
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81
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Pereira DY, Chiu RYT, Zhang SCL, Wu BM, Kamei DT. Single-step, paper-based concentration and detection of a malaria biomarker. Anal Chim Acta 2015; 882:83-9. [PMID: 26043095 DOI: 10.1016/j.aca.2015.04.040] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 04/15/2015] [Accepted: 04/20/2015] [Indexed: 10/23/2022]
Abstract
The lateral-flow immunoassay (LFA) is an inexpensive and rapid paper-based assay that can potentially detect infectious disease biomarkers in resource-poor settings. Despite its many advantages that make it suitable for point-of-care diagnosis, LFA is limited by its inferior sensitivity relative to sophisticated laboratory-based assays. Our group previously introduced the use of a micellar aqueous two-phase system (ATPS), comprised of the nonionic Triton X-114 surfactant, to concentrate biomarkers in a sample and enhance their detection with LFA. However, achieving complete phase separation and target concentration using the Triton X-114 system required many hours, and the concentrated sample needed to be manually extracted and applied to LFA. Here, we successfully integrated the concentration and detection steps into a single step that occurs entirely within a portable paper-based diagnostic strip. In a novel approach, we applied the micellar ATPS to a 3-D paper design and effectively reduced the macroscopic phase separation time from 8 h to approximately 3 min. The 3-D design was integrated with LFA to simultaneously concentrate and detect Plasmodium lactate dehydrogenase (pLDH), a malaria biomarker, in both phosphate-buffered saline and fetal bovine serum within 20 min at room temperature. Compared to a conventional LFA setup with a pLDH detection limit of 10 ng μL(-1), our single-step diagnostic successfully detected pLDH at 1.0 ng μL(-1), demonstrating a 10-fold detection limit improvement and resulting in a sensitive and user-friendly assay that can be used at the point-of-care. The integration of a micellar ATPS and LFA represents a new platform that can improve and promote the use of paper-based diagnostic assays for malaria and other diseases within resource-poor settings.
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Affiliation(s)
- David Y Pereira
- Department of Bioengineering, University of California, 420 Westwood Plaza, 5121J Engineering V, P.O. Box 951600, Los Angeles, CA 90095-1600, USA
| | - Ricky Y T Chiu
- Department of Bioengineering, University of California, 420 Westwood Plaza, 5121J Engineering V, P.O. Box 951600, Los Angeles, CA 90095-1600, USA
| | - Samantha C L Zhang
- Department of Bioengineering, University of California, 420 Westwood Plaza, 5121J Engineering V, P.O. Box 951600, Los Angeles, CA 90095-1600, USA
| | - Benjamin M Wu
- Department of Bioengineering, University of California, 420 Westwood Plaza, 5121J Engineering V, P.O. Box 951600, Los Angeles, CA 90095-1600, USA; Division of Advanced Prosthodontics & Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1600, USA
| | - Daniel T Kamei
- Department of Bioengineering, University of California, 420 Westwood Plaza, 5121J Engineering V, P.O. Box 951600, Los Angeles, CA 90095-1600, USA.
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82
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Ribeiro BD, Barreto DW, Coelho MAZ. Use of micellar extraction and cloud point preconcentration for valorization of saponins from sisal (Agave sisalana) waste. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2014.07.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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83
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Usha HS, Maitra S. Synthesis Characterization and Application of Polyglycerol Esters of Fatty Acids: Biodegradable Surfactants. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2015.1025137] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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84
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Zhao J, Lu Y, Fan C, Wang J, Yang Y. Development of a cloud point extraction and spectrophotometry-based microplate method for the determination of nitrite in human urine and blood. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:802-807. [PMID: 25448978 DOI: 10.1016/j.saa.2014.09.097] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 09/02/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
A novel and simple method for the sensitive determination of trace amounts of nitrite in human urine and blood has been developed by combination of cloud point extraction (CPE) and microplate assay. The method is based on the Griess reaction and the reaction product is extracted into nonionic surfactant Triton-X114 using CPE technique. In this study, decolorization treatment of urine and blood was applied to overcome the interference of matrix and enhance the sensitivity of nitrite detection. Multi-sample can be simultaneously detected thanks to a 96-well microplate technique. The effects of different operating parameters such as type of decolorizing agent, concentration of surfactant (Triton X-114), addition of (NH4)2SO4, extraction temperature and time, interfering elements were studied and optimum conditions were obtained. Under the optimum conditions, a linear calibration graph was obtained in the range of 10-400 ng mL(-1) of nitrite with limit of detection (LOD) of 2.5 ng mL(-1). The relative standard deviation (RSD) for determination of 100 ng mL(-1) of nitrite was 2.80%. The proposed method was successfully applied for the determination of nitrite in the urine and blood samples with recoveries of 92.6-101.2%.
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Affiliation(s)
- Jiao Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Yunhui Lu
- The First People's Hospital of Yunnan Province, Kunming 650228, China
| | - Chongyang Fan
- The First People's Hospital of Yunnan Province, Kunming 650228, China
| | - Jun Wang
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Yaling Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
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85
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Doroshchuk VA, Levchik VM, Mandzyuk ES. Cloud-point extraction preconcentration of sym-triazine herbicides to determination by gas chromatography. JOURNAL OF ANALYTICAL CHEMISTRY 2015. [DOI: 10.1134/s106193481412003x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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86
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Li W, Wang Y, Huang L, Wu T, Hu H, Du Y. Rapid determination of trace thiabendazole in apple juice utilizing dispersive liquid-liquid microextraction combined with fluorescence spectrophotometry. LUMINESCENCE 2015; 30:872-7. [DOI: 10.1002/bio.2835] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/18/2014] [Accepted: 11/30/2014] [Indexed: 01/13/2023]
Affiliation(s)
- Wei Li
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yuning Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Limin Huang
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Ting Wu
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Huilian Hu
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yiping Du
- Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test; East China University of Science and Technology; Shanghai 200237 People's Republic of China
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87
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Gao N, Wu H, Chang Y, Guo X, Zhang L, Du L, Fu Y. Mixed micelle cloud point-magnetic dispersive μ-solid phase extraction of doxazosin and alfuzosin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:10-16. [PMID: 24995413 DOI: 10.1016/j.saa.2014.06.095] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/03/2014] [Accepted: 06/16/2014] [Indexed: 06/03/2023]
Abstract
Mixed micelle cloud point extraction (MM-CPE) combined with magnetic dispersive μ-solid phase extraction (MD-μ-SPE) has been developed as a new approach for the extraction of doxazosin (DOX) and alfuzosin (ALF) prior to fluorescence analysis. The mixed micelle anionic surfactant sodium dodecyl sulfate and non-ionic polyoxyethylene(7.5)nonylphenylether was used as the extraction solvent in MM-CPE, and diatomite bonding Fe₃O₄ magnetic nanoparticles were used as the adsorbent in MD-μ-SPE. The method was based on MM-CPE of DOX and ALF in the surfactant-rich phase. Magnetic materials were used to retrieve the surfactant-rich phase, which easily separated from the aqueous phase under magnetic field. At optimum conditions, a linear relationship between DOX and ALF was obtained in the range of 5-300 ng mL(-1), and the limits of detection were 0.21 and 0.16 ng mL(-1), respectively. The proposed method was successfully applied for the determination of the drugs in pharmaceutical preparations, urine samples, and plasma samples.
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Affiliation(s)
- Nannan Gao
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China
| | - Hao Wu
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China.
| | - Yafen Chang
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China
| | - Xiaozhen Guo
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China
| | - Lizhen Zhang
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China
| | - Liming Du
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China.
| | - Yunlong Fu
- Analytical and Testing Center, Shanxi Normal University, Linfen, Shanxi 041004, PR China
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88
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Partitioning equilibria in multicomponent surfactant systems for design of surfactant-based extraction processes. Chem Eng Res Des 2014. [DOI: 10.1016/j.cherd.2014.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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89
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Musunuri S, Kultima K, Richard BC, Ingelsson M, Lannfelt L, Bergquist J, Shevchenko G. Micellar extraction possesses a new advantage for the analysis of Alzheimer's disease brain proteome. Anal Bioanal Chem 2014; 407:1041-57. [PMID: 25416231 DOI: 10.1007/s00216-014-8320-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 10/30/2014] [Accepted: 11/03/2014] [Indexed: 12/11/2022]
Abstract
Integral membrane proteins (MPs), such as transporters, receptors, and ion channels, are of great interest because of their participation in various vital cellular functions including cell-cell interactions, ion transport, and signal transduction. However, studies of MPs are complicated because of their hydrophobic nature, heterogeneity, and low abundance. Cloud-point extraction (CPE) with the non-ionic surfactant Triton X-114 was performed to simultaneously extract and phase separate hydrophobic and hydrophilic proteins from Alzheimer's disease (AD) and unaffected control brain tissue. Quantitative proteomics analysis of temporal neocortex samples of AD patients and controls was performed using a shotgun approach based on stable isotope dimethyl labeling (DML) quantification technique followed by nanoLC-MS/MS analysis. A total of 1096 unique proteins were identified and quantified, with 40.3 % (211/524) predicted as integral MPs with at least one transmembrane domain (TMD) found in the detergent phase, and 10 % (80/798) in the detergent-depleted phase. Among these, 62 proteins were shown to be significantly altered (p-value <0.05), in AD versus control samples. In the detergent fraction, we found 10 hydrophobic transmembrane proteins containing up to 14 putative TMDs that were significantly up- or down-regulated in AD compared with control brains. Changes in four of these proteins, alpha-enolase (ENOA), lysosome-associated membrane glycoprotein 1 (LAMP1), 14-3-3 protein gamma (1433G), and sarcoplasmic/endoplasmic reticulum calcium ATPase2 (AT2A2) were validated by immunoblotting. Our results emphasize that separating hydrophobic MPs in CPE contributes to an increased understanding of the underlying molecular mechanisms in AD. Such knowledge can become useful for the development of novel disease biomarkers.
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Affiliation(s)
- Sravani Musunuri
- Analytical Chemistry, Department of Chemistry-BMC, Uppsala University, Uppsala, Sweden
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90
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Tan CH, Show PL, Ooi CW, Ng EP, Lan JCW, Ling TC. Novel lipase purification methods - a review of the latest developments. Biotechnol J 2014; 10:31-44. [PMID: 25273633 DOI: 10.1002/biot.201400301] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 08/05/2014] [Accepted: 08/28/2014] [Indexed: 11/05/2022]
Abstract
Microbial lipases are popular biocatalysts due to their ability to catalyse diverse reactions such as hydrolysis, esterification, and acidolysis. Lipases function efficiently on various substrates in aqueous and non-aqueous media. Lipases are chemo-, regio-, and enantio-specific, and are useful in various industries, including those manufacturing food, detergents, and pharmaceuticals. A large number of lipases from fungal and bacterial sources have been isolated and purified to homogeneity. This success is attributed to the development of both conventional and novel purification techniques. This review highlights the use of these techniques in lipase purification, including conventional techniques such as: (i) ammonium sulphate fractionation; (ii) ion-exchange; (iii) gel filtration and affinity chromatography; as well as novel techniques such as (iv) reverse micellar system; (v) membrane processes; (vi) immunopurification; (vi) aqueous two-phase system; and (vii) aqueous two-phase floatation. A summary of the purification schemes for various bacterial and fungal lipases are also provided.
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Affiliation(s)
- Chung Hong Tan
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Selangor Darul Ehsan, Malaysia
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91
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Majedi SM, Kelly BC, Lee HK. Toward a robust analytical method for separating trace levels of nano-materials in natural waters: cloud point extraction of nano-copper(II) oxide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:11811-11822. [PMID: 24293302 DOI: 10.1007/s11356-013-2381-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 11/15/2013] [Indexed: 06/02/2023]
Abstract
Cloud point extraction (CPE) factors, namely Triton X-114 (TX-114) concentration, pH, ionic strength, incubation time, and temperature, were optimized for the separation of nano-sized copper(II) oxide (nCuO) in aqueous matrices. The kinetics of phase transfer was studied using UV-visible spectroscopy. From the highest separation rate, the most favorable conditions were observed with 0.2 % w/v of TX-114, pH = 9.0, ionic strength of 10 mM NaCl, and incubation at 40 °C for 60 min, yielding an extraction efficiency of 89.2 ± 3.9 % and a preconcentration factor of 86. The aggregate size distribution confirmed the formation of very large nCuO-micelle assemblies (11.9 μm) under these conditions. The surface charge of nCuO was also diminished effectively. An extraction efficiency of 91 % was achieved with a mixture of TX-100 and TX-114 containing 30 wt.% of TX-100. Natural organic and particulate matters, represented by humic acid (30 mg/L) and micron-sized silica particles (50 mg/L), respectively, did not significantly reduce the CPE efficiency (<10 %). The recovery of copper(II) ions (20 mg/L) in the presence of humic acid was low (3-10 %). The spiked natural water samples were analyzed either directly or after CPE by inductively coupled plasma mass spectrometry following acid digestion/microwave irradiation. The results indicated the influence of matrix effects and their reduction by CPE. A delay between spiking nCuO and CPE may also influence the recovery of nCuO due to aggregation and dissolution. A detection limit of 0.04 μg Cu/L was achieved for nCuO.
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Affiliation(s)
- Seyed Mohammad Majedi
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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92
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Chen H, Luo J, Wang Q, Zhang D, Jiang R. Psoralen and Isopsoralen’s Cloud-Point Extraction from Psoralea corylifolia L.. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.908217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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93
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Ghouas H, Haddou B, Kameche M, Louhibi L, Derriche Z, Canselier JP, Gourdon C. Cloud Point Extraction of α-Amino Acids. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.919322] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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94
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Jue E, Yamanishi CD, Chiu RYT, Wu BM, Kamei DT. Using an aqueous two-phase polymer-salt system to rapidly concentrate viruses for improving the detection limit of the lateral-flow immunoassay. Biotechnol Bioeng 2014; 111:2499-507. [PMID: 24942535 DOI: 10.1002/bit.25316] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/28/2014] [Accepted: 06/13/2014] [Indexed: 11/06/2022]
Abstract
The development of point-of-need (PON) diagnostics for viruses has the potential to prevent pandemics and protects against biological warfare threats. Here we discuss the approach of using aqueous two-phase systems (ATPSs) to concentrate biomolecules prior to the lateral-flow immunoassay (LFA) for improved viral detection. In this paper, we developed a rapid PON detection assay as an extension to our previous proof-of-concept studies which used a micellar ATPS. We present our investigation of a more rapid polymer-salt ATPS that can drastically improve the assay time, and show that the phase containing the concentrated biomolecule can be extracted prior to macroscopic phase separation equilibrium without affecting the measured biomolecule concentration in that phase. We could therefore significantly decrease the time of the diagnostic assay with an early extraction time of just 30 min. Using this rapid ATPS, the model virus bacteriophage M13 was concentrated between approximately 2 and 10-fold by altering the volume ratio between the two phases. As the extracted virus-rich phase contained a high salt concentration which destabilized the colloidal gold indicator used in LFA, we decorated the gold nanoprobes with polyethylene glycol (PEG) to provide steric stabilization, and used these nanoprobes to demonstrate a 10-fold improvement in the LFA detection limit. Lastly, a MATLAB script was used to quantify the LFA results with and without the pre-concentration step. This approach of combining a rapid ATPS with LFA has great potential for PON applications, especially as greater concentration-fold improvements can be achieved by further varying the volume ratio. Biotechnol. Bioeng. 2014;111: 2499-2507. © 2014 Wiley Periodicals, Inc.
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Affiliation(s)
- Erik Jue
- Department of Bioengineering, University of California, 5121 Engineering V, 420 Westwood Plaza, Los Angeles, California, 90095-1600
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95
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Phase behavior of systems containing Genapol X080®+technical 1-dodecene+water compared with the phase behavior of pure C12E8+pure 1-dodecene+water. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2013.04.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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96
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Arkhipov VP, Idiyatullin ZS, Potapova EF, Antzutkin ON, Filippov AV. Micelles and Aggregates of Oxyethylated Isononylphenols and Their Extraction Properties near Cloud Point. J Phys Chem B 2014; 118:5480-7. [DOI: 10.1021/jp502386e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | | | | | - Oleg N. Antzutkin
- Chemistry
of Interfaces, Luleå University of Technology, SE-91187 Luleå, Sweden
- Department
of Physics, Warwick University, CV4 7AL, Coventry, U.K
| | - Andrey V. Filippov
- Chemistry
of Interfaces, Luleå University of Technology, SE-91187 Luleå, Sweden
- Kazan Federal University, 420008 Kazan, Russia
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97
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Stamatopoulos K, Katsoyannos E, Chatzilazarou A. Antioxidant Activity and Thermal Stability of Oleuropein and Related Phenolic Compounds of Olive Leaf Extract after Separation and Concentration by Salting-Out-Assisted Cloud Point Extraction. Antioxidants (Basel) 2014; 3:229-44. [PMID: 26784869 PMCID: PMC4665490 DOI: 10.3390/antiox3020229] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 03/11/2014] [Accepted: 03/24/2014] [Indexed: 11/26/2022] Open
Abstract
A fast, clean, energy-saving, non-toxic method for the stabilization of the antioxidant activity and the improvement of the thermal stability of oleuropein and related phenolic compounds separated from olive leaf extract via salting-out-assisted cloud point extraction (CPE) was developed using Tween 80. The process was based on the decrease of the solubility of polyphenols and the lowering of the cloud point temperature of Tween 80 due to the presence of elevated amounts of sulfates (salting-out) and the separation from the bulk solution with centrifugation. The optimum conditions were chosen based on polyphenols recovery (%), phase volume ratio (Vs/Vw) and concentration factor (Fc). The maximum recovery of polyphenols was in total 95.9%; Vs/Vw was 0.075 and Fc was 15 at the following conditions: pH 2.6, ambient temperature (25 °C), 4% Tween 80 (w/v), 35% Na2SO4 (w/v) and a settling time of 5 min. The total recovery of oleuropein, hydroxytyrosol, luteolin-7-O-glucoside, verbascoside and apigenin-7-O-glucoside, at optimum conditions, was 99.8%, 93.0%, 87.6%, 99.3% and 100.0%, respectively. Polyphenolic compounds entrapped in the surfactant-rich phase (Vs) showed higher thermal stability (activation energy (Ea) 23.8 kJ/mol) compared to non-entrapped ones (Ea 76.5 kJ/mol). The antioxidant activity of separated polyphenols remained unaffected as determined by the 1,1-diphenyl-2-picrylhydrazyl method.
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Affiliation(s)
- Konstantinos Stamatopoulos
- Department of Food Technology, Faculty of Food Technology and Nutrition, Technological Educational Institute of Athens, 12 Ag. Spyridonos St., Egaleo, Athens 12210, Greece.
| | - Evangelos Katsoyannos
- Department of Food Technology, Faculty of Food Technology and Nutrition, Technological Educational Institute of Athens, 12 Ag. Spyridonos St., Egaleo, Athens 12210, Greece.
| | - Arhontoula Chatzilazarou
- Department of Oenology and Beverage Technology, Faculty of Food Technology and Nutrition, Technological Educational Institute of Athens, 12 Ag. Spyridonos St., Egaleo, Athens 12210, Greece.
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98
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Milosevic M, Staal KJ, Bargeman G, Schuur B, de Haan AB. Fractionation of aqueous sodium salts by liquid–liquid extraction in aqueous two phase systems. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.01.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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99
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Shariati S, Golshekan M. Optimization of cloud point extraction of copper with neocuproine from aqueous solutions using Taguchi fractional factorial design. JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1134/s1061934814030125] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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100
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Majedi SM, Kelly BC, Lee HK. Evaluation of a cloud point extraction approach for the preconcentration and quantification of trace CuO nanoparticles in environmental waters. Anal Chim Acta 2014; 814:39-48. [DOI: 10.1016/j.aca.2014.01.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/02/2014] [Accepted: 01/08/2014] [Indexed: 12/28/2022]
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