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Guo S, Wang S, Meng J, Gu D, Yang Y. Immobilized enzyme for screening and identification of anti-diabetic components from natural products by ligand fishing. Crit Rev Biotechnol 2023; 43:242-257. [PMID: 35156475 DOI: 10.1080/07388551.2021.2025034] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Diabetes is a chronic metabolic disease caused by insufficient insulin secretion and insulin resistance. Natural product is one of the most important resources for anti-diabetic drug. However, due to the extremely complex composition, this research is facing great challenges. After the advent of ligand fishing technology based on enzyme immobilization, the efficiency of screening anti-diabetic components has been greatly improved. In order to provide critical knowledge for future research in this field, the application progress of immobilized enzyme in screening anti-diabetic components from complex natural extracts in recent years was reviewed comprehensively, including novel preparation technologies and strategies of immobilized enzyme and its outstanding application prospect in many aspects. The basic principles and preparation steps of immobilized enzyme were briefly described, including entrapment, physical adsorption, covalent binding, affinity immobilization, multienzyme system and carrier-free immobilization. New formatted immobilized enzymes with different carriers, hollow fibers, magnetic materials, microreactors, metal organic frameworks, etc., were widely used to screen anti-diabetic compositions from various natural products, such as Ginkgo biloba, Morus alba, lotus leaves, Pueraria lobata, Prunella vulgaris, and Magnolia cortex. Furthermore, the challenges and future prospects in this field were put forward in this review.
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Affiliation(s)
- Shuang Guo
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Shuai Wang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Jing Meng
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Dongyu Gu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China.,College of Marine Science and Environment, Dalian Ocean University, Dalian, China
| | - Yi Yang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
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2
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Affinity screening of potential anti-obesity and anti-diabetic component from pomegranate peel by co-immobilization of lipase and α-amylase using carbon nanotube and hydrogel. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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3
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Guo S, Liu S, Meng J, Gu D, Wang Y, He D, Yang Y. Dual-target affinity analysis and separation of α-amylase and α-glucosidase inhibitors from Morus alba leaves using a magnetic bifunctional immobilized enzyme system. Biomed Chromatogr 2023; 37:e5571. [PMID: 36520456 DOI: 10.1002/bmc.5571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 12/16/2022]
Abstract
Morus alba leaves are a natural product with great antidiabetic potential. However, the therapeutic efficacy of natural products is usually achieved through the interaction of active compounds with specific targets. Among them, active compounds with multi-target therapeutic functions are more effective than single-target enzymes. In this study, a bienzyme system was constructed by co-immobilizing α-amylase and α-glucosidase onto Fe3 O4 for affinity screening of dual-target active components in the complex extract from M. alba leaves. As a result, a potential active compound was selectively screened by ligand fishing, separated by high-speed countercurrent chromatography using a solvent system of ethyl acetate-n-butanol-water (3:2:5, v/v), and identified as rutin. In addition, the result of molecular docking showed that rutin could interact with the active center of α-amylase and α-glucosidase through multiple hydrogen bonds, van der Waals forces, etc. to play an inhibitory role. These results demonstrate the effectiveness of the polydopamine magnetically immobilized bienzyme system for dual-target affinity screening of active substances. This study not only reveals the chemical basis of the antidiabetic activity of M. alba leaves from a dual-target perspective, but also promotes the progress of multitarget affinity screening.
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Affiliation(s)
- Shuang Guo
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Shuo Liu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Jing Meng
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China
| | - Dongyu Gu
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China
| | - Yi Wang
- School of Biological Engineering, Dalian Polytechnic University, Dalian, China
| | - Dajun He
- College of Life Science, Analysis and Testing Centre, Shihezi University, Shihezi, China
| | - Yi Yang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
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4
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Guo S, Meng J, Wang S, Gu D, Chu T, Yang Y. Preparation of magnetic microcapsules of α-amylase and α-glucosidase for dual-target affinity screening of active components from Toona sinensis. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Parallel artificial liquid membrane extraction of organophosphorus nerve agent degradation products from environmental samples. Anal Chim Acta 2022; 1190:339261. [PMID: 34857147 DOI: 10.1016/j.aca.2021.339261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/26/2021] [Accepted: 11/06/2021] [Indexed: 11/23/2022]
Abstract
An emerging miniaturized high-throughput microextraction technique named Parallel artificial liquid membrane extraction (PALME) was, for the first time, investigated for the extraction of polar alkyl methylphosphonic acids (AMPAs) that are the degradation products of organophosphorus nerve agents. The effect of the key-parameters of the extraction method (nature of the membrane, of the extraction solvent, of the pH values of both donor and acceptor phases, agitation speed, extraction time, temperature and ionic strength) on the extraction recoveries was studied in spiked pure water samples. This led to extraction recoveries in the range of 25-102% for the 5 targeted analytes from water with enrichment factors in the range of 4.50-42.75. The developed PALME-LC-MS/MS method was first evaluated with spiked pure water. LOQs (S/N ≥ 10) were in the range of 0.009-1.141 ng mL-1, linearity above 0.9973 for all the AMPAs and with RSD values below 11%. This method was then applied on simulated waste water, river water and aqueous soil extracts. The achieved LOQs were in the range of 0.011-1.210, 0.013-1.196 and 0.016-6.810 ng mL-1, respectively. A detailed comparison of the performances of this PALME method with those of a previously developed hollow fiber liquid-phase microextraction methods already applied to AMPAs was done thus allowing to demonstrate the easy transfer of methods from HF-LPME to PALME. Moreover, the high-throughput potential of PALME was revealed since 192 samples were processed in parallel during 120 min (37.5 s/sample).
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6
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Conrady MW, Bauer M, Jo KD, Cropek DM, Busby RR. Solid-phase microextraction (SPME) for determination of geosmin and 2-methylisoborneol in volatile emissions from soil disturbance. CHEMOSPHERE 2021; 284:131333. [PMID: 34225125 DOI: 10.1016/j.chemosphere.2021.131333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
A method is described here for the concentration and determination of geosmin and 2-methylisoborneol (2-MIB) from the gaseous phase, with translation to field collection and quantification from soil disturbances in situ. The method is based on the use of solid-phase microextraction (SPME) fibers for adsorption of volatile chemicals from the vapor phase, followed by desorption into a gas chromatograph-mass spectrometer (GC-MS) for analysis. The use of a SPME fiber allows simple introduction to the GC-MS without further sample preparation. Several fiber sorbent types were studied and the 50/30 μm DVB/CAR/PDMS was the best performer to maximize the detected peak areas of both analytes combined. Factors such as extraction temperature and time along with desorption temperature and time were explored with respect to analyte recovery. An extraction temperature of 30 °C for 10 min, with a desorption temperature of 230 °C for 4 min was best for the simultaneous analysis of both geosmin and 2-MIB without complete loss of either one. The developed method was used successfully to measure geosmin and 2-MIB emission from just above disturbed and undisturbed soils, indicating that this method detects both compounds readily from atmospheric samples. Both geosmin and 2-MIB were present as background concentrations in the open air, while disturbed soils emitted much higher concentrations of both compounds. Surprisingly, 2-MIB was always detected at higher concentrations than geosmin, indicating that a focus on its detection may be more useful for soil emission monitoring and more sensitive to low levels of soil disturbance.
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Affiliation(s)
- Morgan W Conrady
- U.S. Army Construction Engineering Research Laboratory, Champaign, IL, USA
| | - Markus Bauer
- Education Center of the German Armed Forces, Mannheim, DE, USA
| | - Kyoo D Jo
- U.S. Army Construction Engineering Research Laboratory, Champaign, IL, USA
| | - Donald M Cropek
- U.S. Army Construction Engineering Research Laboratory, Champaign, IL, USA
| | - Ryan R Busby
- U.S. Army Construction Engineering Research Laboratory, Champaign, IL, USA.
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Dong ZY, Lin YL, Zhang TY, Hu CY, Pan Y, Zheng ZX, Tang YL, Xu B, Gao NY. The formation, analysis, and control of chlor(am)ination-derived odor problems: A review. WATER RESEARCH 2021; 203:117549. [PMID: 34419919 DOI: 10.1016/j.watres.2021.117549] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/02/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Odors and tastes have become universal problems related to drinking water quality. In addition to the typical odor problems caused by algae or microorganisms, the occurrence of odors derived from drinking water disinfection have attracted attention. The chlor(am)ination-derived odor substances have certain toxicity and odor-causing characteristics, and would enter the tap water through water distribution systems, directly affecting drinking water safety and customer experience. This study provided a comprehensive overview of the occurrence, detection, and control of odor substances derived from drinking water chlor(am)ination disinfection. The occurrence and formation mechanisms of several typical types of disinfection derived odor substances were summarized, including haloanisoles, N-chloroaldimines, iodotrihalomethanes, and halophenoles. They are mainly derived from specific precursors such as halophenols, anisoles, and amino acids species during the disinfection or distribution networks. In addition, the change of disinfectant during chlor(am)ination was also one of the causes of disinfection odors. Due to the extremely low odor threshold concentrations (OTCs) of these odor substances, the effective sample pre-enrichment for instrument identification and quantification are essential. The control strategies of odor problems mainly include adsorption, chemical oxidation, and combined processes such as ozonation and biological activated carbon processes (O3/BAC) and ultraviolet-based advanced oxidation processes (UV-AOPs). Finally, the challenges and possible future research directions in this research field were discussed and proposed.
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Affiliation(s)
- Zheng-Yu Dong
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Yi-Li Lin
- Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 824, Taiwan, R.O.C
| | - Tian-Yang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Chen-Yan Hu
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China
| | - Yang Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zheng-Xiong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Yu-Lin Tang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Bin Xu
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China.
| | - Nai-Yun Gao
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
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Jové P, Pareras A, De Nadal R, Verdum M. Development and optimization of a quantitative analysis of main odorants causing off flavours in cork stoppers using headspace solid-phase microextraction gas chromatography tandem mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2021; 56:e4728. [PMID: 33887808 DOI: 10.1002/jms.4728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/19/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
A simple and sensitive method was developed and validated to simultaneously separate and determine the 2-Methoxy-3,5-dimethylpyrazine, 2-Isopropyl-3-methoxypyrazine, guaiacol, 2-Isobutyl-3-methoxypyrazine, 2-Methylisoborneol, geosmin, 2,4,6-Trichloroanisole, 2,3,4,6-Tetrachloroanisole, 2,4,6-Tribromoanisole and Pentachloroanisole in cork stoppers via headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography tandem mass spectrometry (GC-MS/MS). The influence of the fibre coating used, the extraction times and temperatures, the sodium chloride additions and the desorption temperatures were investigated. Once done, the optimial HS-SPME conditions established were divinylbenzene/carboxenpolydimethylsiloxane/polydimethylsiloxane (DVB/CAR/PDMS) fibres, a 50°C extraction temperature, 60-min extraction time, an ionic strength of 3-g sodium chlorid and a 290°C desorption temperature. The method showed a good linearity (R2 ≥ 0.994) within the tested range (from 0.1 to 50 ng L-1 ) for all the compounds. Using TCA-d10 and MIB-d3 as internal standards the precision, expressed as repeatability and reproducibility RSD, was <10% in both. Note that the limits of quantifications (LOQs) are below the sensory threshold levels for such compounds in water and wine. Good recoveries were obtained for cork macerates (from 100.4% to 126%) and when compared with other reported methods using HS-SPME in water and cork stopper samples, the present method had more analytes with the lowest limit of detection for most of the targeted compounds, along with good precision and recovery.
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Affiliation(s)
- Patricia Jové
- Catalan Cork Institute and Foundation, Institut Català del Suro (ICSuro), Girona, Spain
| | - Anna Pareras
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, Spain
| | | | - Maria Verdum
- Catalan Cork Institute and Foundation, Institut Català del Suro (ICSuro), Girona, Spain
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Mustapha S, Tijani JO, Ndamitso MM, Abdulkareem AS, Shuaib DT, Mohammed AK. A critical review on geosmin and 2-methylisoborneol in water: sources, effects, detection, and removal techniques. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:204. [PMID: 33751262 DOI: 10.1007/s10661-021-08980-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
The exposure to geosmin (GSM) and 2-methylisoborneol (2-MIB) in water has caused a negative impact on product reputation and customer distrust. The occurrence of these compounds and their metabolites during drinking water treatment processes has caused different health challenges. Conventional treatment techniques such as coagulation, sedimentation, filtration, and chlorination employed in removing these two commonest taste and odor compounds (GSM and 2-MIB) were found to be ineffective and inherent shortcomings. The removal of GSM and MIB were found to be effective using combination of activated carbon and ozonation; however, high treatment cost associated with ozonation technique and poor regeneration efficiency of activated carbon constitute serious setback to the combined system. Other shortcoming of the activated carbon adsorption and ozonation include low adsorption efficiency due to the presence of natural organic matter and humic acid. In light of this background, the review is focused on the sources, effects, environmental pathways, detection, and removal techniques of 2-MIB and GSM from aqueous media. Although advanced oxidation processes (AOPs) were found to be promising to remove the two compounds from water but accompanied with different challenges. Herein, to fill the knowledge gap analysis on these algal metabolites (GSM and 2-MIB), the integration of treatment processes vis-a-viz combination of one or more AOPs with other conventional methods are considered logical to remove these odorous compounds and hence could improve overall water quality.
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Affiliation(s)
- S Mustapha
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria.
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria.
| | - J O Tijani
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - M M Ndamitso
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - A S Abdulkareem
- Department of Chemical Engineering, Federal University of Technology, Gidan Kwano Campus, PMB 65, Minna, Niger State, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - D T Shuaib
- Department of Chemistry, Illinois Institute of Technology, 3101 S Dearborn Street, Chicago, IL, 60616, USA
| | - A K Mohammed
- Department of Chemistry and Biochemistry, North Carolina Central University, 1801 Fayetteville Street, NC, 27707, Durham, USA
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Abstract
Thirty years since the invention and public disclosure of solid phase microextraction (SPME), the technology continues evolving and inspiring several other green extraction technologies amenable for the collection of small molecules present in complex matrices. In this manuscript, we review the fundamental and operational aspects of a novel SPME geometry that can be used to “hunt” target molecules in complex matrices: the SPME Arrow. In addition, a series of applications in environmental, food, cannabis and forensic analysis are succinctly covered. Finally, special emphasis is placed on novel interfaces to analytical instrumentation, as well as recent developments in coating materials for the SPME Arrow.
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González-Álvarez RJ, Bellido-Milla D, Pinto JJ, Moreno C. A handling-free methodology for rapid determination of Cu species in seawater based on direct solid micro-samplers analysis by high-resolution continuum source graphite furnace atomic absorption spectrometry. Talanta 2020; 206:120249. [PMID: 31514883 DOI: 10.1016/j.talanta.2019.120249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 10/26/2022]
Abstract
A very simple, sensible and advanced new methodology for the determination of copper species in seawater has been developed. The method consisted of two steps: first a separation/preconcentration of copper species by using liquid phase microextraction-based solvent bars followed by the direct analysis of these solid polymeric micro-samplers in an atomic absorption spectrometer provided with a device for direct analysis. For liquid microextraction, di-2-pyridylketone benzoylhydrazone (dPKBH) dissolved in octan-1-ol was selected as the extracting agent due to its ability to transport inorganic Cu species from seawater samples. The optimum chemical and physical conditions for copper micro-extraction were sample pH 8, a dPKBH concentration of 0.010 mol L-1, a stirring speed of 800 rpm and an extraction time of 10 min. A graphite furnace temperature program was optimised to assure the complete elimination of the solvent bar matrix, and the atomisation step took place at 2200 °C. The method exhibited a limit of detection of 0.026 μg L-1 of copper and a linear range up to 1.50 μg L-1, showing great repeatability and reproducibility (4.07% and 4.43%, respectively). Suitability of the method was confirmed by analysing a certified reference material (CASS-4) under optimum conditions, being the first time ever that a direct solid analysis-based method has been used for the determination of total dissolved copper concentration in seawater. Furthermore, the method was applied to the determination of the operationally defined transportable Cu fraction in seawater samples at natural conditions and the results were compared with theoretical data provided by Visual MINTEQ® 3.1 software. A mathematical model that permits to estimate total dissolved copper concentration was obtained, and the non-transportable copper fraction was calculated by difference.
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Affiliation(s)
- Rafael Jesús González-Álvarez
- Department of Analytical Chemistry, Faculty of Marine and Environmental Sciences, Instituto de Investigación Marina (INMAR). University of Cádiz, 11510, Puerto Real, Spain
| | - Dolores Bellido-Milla
- Department of Analytical Chemistry, Faculty of Sciences, University of Cádiz, 11510, Puerto Real, Spain
| | - Juan José Pinto
- Department of Analytical Chemistry, Faculty of Marine and Environmental Sciences, Instituto de Investigación Marina (INMAR). University of Cádiz, 11510, Puerto Real, Spain.
| | - Carlos Moreno
- Department of Analytical Chemistry, Faculty of Marine and Environmental Sciences, Instituto de Investigación Marina (INMAR). University of Cádiz, 11510, Puerto Real, Spain
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Kamata T, Sumimoto M, Shiba S, Kurita R, Niwa O, Kato D. Increased electrode activity during geosmin oxidation provided by Pt nanoparticle-embedded nanocarbon film. NANOSCALE 2019; 11:8845-8854. [PMID: 31012904 DOI: 10.1039/c9nr00793h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The musty odor compound geosmin was electrochemically detected by using Pt nanoparticle (PtNP)-embedded nanocarbon (Pt-C) films formed with unbalanced magnetron (UBM) co-sputtering. The sputtered Pt components formed NPs (typically 1.53-4.75 nm in diameter) spontaneously in the carbon films, owing to the poor intermiscibility of Pt with carbon. The surface concentrations of PtNPs embedded in the nanocarbon film were widely controllable (Pt = 4.8-35.9 at%) by regulating the target powers of the Pt and carbon individually. The obtained film had a flat surface (Ra = 0.17-0.18 nm) despite the fact the PtNPs were partially exposed at the surface. Compared with a Pt film electrode, some Pt-C films exhibited higher electrode activity against geosmin although the surface Pt concentrations of these Pt-C films were much lower than that of the Pt film electrode, thanks to the wider potential window and lower background current that resulted from the ultraflat and stable carbon-based film prepared by UBM co-sputtering. Computational experiments revealed that the theoretical oxidation potential (Eox) value for geosmin was relatively similar to that obtained in electrochemical experiments using our Pt-C film electrode. Moreover, we also theoretically estimated the possible oxidation site of geosmin molecules and the advantage of the NP shape of the electroactive Pt parts as regards the electrochemical oxidation of geosmin. We successfully used the Pt-C film (10.6 at%) electrode to detect geosmin in combination with HPLC at a low detection limit of 100 ng L-1.
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Affiliation(s)
- Tomoyuki Kamata
- National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
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Wang C, Yu J, Guo Q, Zhao Y, Cao N, Yu Z, Yang M. Simultaneous quantification of fifty-one odor-causing compounds in drinking water using gas chromatography-triple quadrupole tandem mass spectrometry. J Environ Sci (China) 2019; 79:100-110. [PMID: 30784435 DOI: 10.1016/j.jes.2018.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/13/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
A wide range of compounds with various structural features can cause taste and odor (T&O) problems in drinking water. It would be desirable to determine all of these compounds using a simple analytical method. In this paper, a sensitive method combining liquid-liquid extraction (LLE) with gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS/MS) was established to simultaneously analyze 51 odor-causing compounds in drinking water, including organic sulfides, aldehydes, benzenes, phenols, ethers, esters, ketones, nitrogenous heterocyclic compounds, 2-methylisoborneol and geosmin. Three deuterated analogs of target analytes, dimethyl disulfide-d6, benzaldehyde-d6 and o-cresol-3,4,5,6-d4, were used to correct the variations in recovery, and five isotope-labeled internal standards (4-chlorotoluene-d4, 1, 4-dichlorobenzene-d4, naphthalene-d8, acenaphthene-d10, phenanthrene-d10 respectively) were used prior to analysis to correct the variations arising from instrument fluctuations and injection errors. The calibration curves of the target compounds showed good linearity (R2 > 0.99, level = 7), and method detection limits (MDLs) below 1/10 of the odor threshold concentrations were achieved for most of the odorants (0.10-20.55 ng/L). The average recoveries of most of the analytes in tap water samples were between 70% and 120%, and the method was reproducible (RSD < 20%, n = 7). Additionally, concentrations of odor-causing compounds in water samples collected from three drinking water treatment plants (DWTPs) were analyzed by this method. According to the results, dimethyl trisulfide, dimethyl disulfide and indole were considered to be the key odorants responsible for the swampy/septic odor. 2-Methylisoborneol and geosmin were detected as the main odor-causing compounds for musty/earthy odor in DWTP B.
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Affiliation(s)
- Chunmiao Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianwei Yu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Qingyuan Guo
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Environmental Science & Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Yu Zhao
- Beijing Waterworks Group, Beijing 100031, China
| | - Nan Cao
- Beijing Waterworks Group, Beijing 100031, China
| | - Zhiyong Yu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Min Yang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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14
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Automated determination of picogram-per-liter level of water taste and odor compounds using solid-phase microextraction arrow coupled with gas chromatography-mass spectrometry. Anal Bioanal Chem 2019; 411:2653-2662. [DOI: 10.1007/s00216-019-01711-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/16/2019] [Accepted: 02/19/2019] [Indexed: 11/26/2022]
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15
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Bristow R, Young I, Pemberton A, Williams J, Maher S. An extensive review of the extraction techniques and detection methods for the taste and odour compound geosmin (trans-1, 10-dimethyl-trans-9-decalol) in water. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.10.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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17
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Chen L, Wang X, Liu Y, Di X. Dual-target screening of bioactive components from traditional Chinese medicines by hollow fiber-based ligand fishing combined with liquid chromatography–mass spectrometry. J Pharm Biomed Anal 2017. [DOI: 10.1016/j.jpba.2017.06.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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18
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Determination of diamondoids in crude oils using gas purge microsyringe extraction with comprehensive two dimensional gas chromatography-time-of-flight mass spectrometry. J Chromatogr A 2016; 1478:75-83. [DOI: 10.1016/j.chroma.2016.11.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 11/03/2016] [Accepted: 11/26/2016] [Indexed: 01/15/2023]
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19
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Nie J, Chen F, Song Z, Sun C, Li Z, Liu W, Lee M. Large volume of water samples introduced in dispersive liquid-liquid microextraction for the determination of 15 triazole fungicides by gas chromatography-tandem mass spectrometry. Anal Bioanal Chem 2016; 408:7461-71. [PMID: 27580608 DOI: 10.1007/s00216-016-9835-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/19/2016] [Accepted: 07/26/2016] [Indexed: 12/15/2022]
Abstract
A novel method of large volume of water samples directly introduced in dispersive liquid-liquid microextraction was developed, which is based on ultrasound/manual shaking-synergy-assisted emulsification and self-generating carbon dioxide gas (CO2) breaking down the emulsion for the determination of 15 triazole fungicides by gas chromatography-tandem mass spectrometry. This technique makes low-density extraction solvent toluene (180 μL) dissolve in 200 mL of samples containing 0.05 mol L(-1) of HCl and 5 % of NaCl (w/v) to form a well emulsion by synergy of ultrasound and manual shaking, and injects NaHCO3 solution (1.0 mol L(-1)) to generate CO2 achieving phase separation with the assistance of ultrasound. The entire process is accomplished within 8 min. The injection of NaHCO3 to generate CO2 achieves phase separation that breaks through the centrifugation limited large volume aqueous samples. In addition, the device could be easily cleaned, and this kind of vessel could be reconfigured for any volume of samples. Under optimal conditions, the low limits of detection ranging from 0.7 to 51.7 ng L(-1), wide linearity, and enrichment factors obtained were in the range 924-3669 for different triazole fungicides. Southern end of the Beijing-Hangzhou Grand Canal water (Hangzhou, China) was used to verify the applicability of the developed method. Graphical Abstract Flow chart of ultrasound/manual shaking-synergy-assisted emulsification and self-generating carbon dioxide gas breaking down the emulsion.
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Affiliation(s)
- Jing Nie
- College of Chemical Engineering, Zhejiang University of Technology, Xiacheng District, Hangzhou, Zhejiang, 310014, China
| | - Fujiang Chen
- College of Chemical Engineering, Zhejiang University of Technology, Xiacheng District, Hangzhou, Zhejiang, 310014, China
| | - Zhiyu Song
- College of Chemical Engineering, Zhejiang University of Technology, Xiacheng District, Hangzhou, Zhejiang, 310014, China
| | - Caixia Sun
- Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, China.,Key Laboratory of Detection for Pesticide Residues, Ministry of Agriculture, Hangzhou, Zhejiang, 310021, China
| | - Zuguang Li
- College of Chemical Engineering, Zhejiang University of Technology, Xiacheng District, Hangzhou, Zhejiang, 310014, China.
| | - Wenhan Liu
- College of Chemical Engineering, Zhejiang University of Technology, Xiacheng District, Hangzhou, Zhejiang, 310014, China.
| | - Mawrong Lee
- Department of Chemistry, National Chung-Hsing University, Taichung, 40227, ROC, Taiwan
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20
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Bai X, Zhang T, Li H, Yang Z. Simultaneous dispersive liquid-liquid microextraction based on a low-density solvent and derivatization followed by gas chromatography for the simultaneous determination of chloroanisoles and the precursor 2,4,6-trichlorophenol in water samples. J Sep Sci 2016; 39:2146-55. [DOI: 10.1002/jssc.201600098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/18/2016] [Accepted: 03/18/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Xiuzhi Bai
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan P.R. China
| | - Ting Zhang
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan P.R. China
| | - Haipu Li
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan P.R. China
| | - Zhaoguang Yang
- College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 Hunan P.R. China
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21
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Hu L, Qian H, Yang X, Li S, Zhang S, Lu R, Zhou W, Gao H. Effervescence-assisted dispersive liquid–liquid microextraction based on the solidification of a floating ionic liquid with a special collection method for the rapid determination of benzoylurea insecticides in water samples. RSC Adv 2016. [DOI: 10.1039/c6ra17889h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dispersion liquid–liquid microextraction based on the solidification of a floating ionic liquid.
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Affiliation(s)
- Lu Hu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Heng Qian
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Xiaoling Yang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Songqing Li
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Sanbing Zhang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Runhua Lu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Wenfeng Zhou
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Haixiang Gao
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
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22
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Recent developments in the analysis of musty odour compounds in water and wine: A review. J Chromatogr A 2016; 1428:72-85. [DOI: 10.1016/j.chroma.2015.09.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/01/2015] [Accepted: 09/03/2015] [Indexed: 02/05/2023]
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23
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Vortex and air assisted liquid–liquid microextraction as a sample preparation method for high-performed liquid chromatography determinations. Talanta 2014; 130:171-6. [DOI: 10.1016/j.talanta.2014.06.066] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/26/2014] [Accepted: 06/27/2014] [Indexed: 12/20/2022]
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24
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TDDFT study on the sensing mechanism of a fluorescent sensor based on Si O bond for fluoride anion. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.10.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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