1
|
Shabelko AR, Derevyanko NA, Ishchenko AA, Yu Tananaiko O. Indopolycarbocyanine dyes as perspective analytical reagents for spectrophotometric determination of nitrite by radical nitration. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124728. [PMID: 38955070 DOI: 10.1016/j.saa.2024.124728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 05/31/2024] [Accepted: 06/25/2024] [Indexed: 07/04/2024]
Abstract
A spectrophotometric method for the quantitative determination of nitrite was developed, based on the radical nitration of indopolycarbocyanine dyes in the presence of 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO). The rate of the reaction of the studied dyes with nitrite increases with the lengthening of the polymethine chain and the presence of hydrophilic sulfo groups in the side chain of the dye. TEMPO acts as a co-reagent, significantly accelerating the reaction rate and increasing the sensitivity of nitrite determination. The proposed reaction mechanism is supported by spectrophotometric and HPLC/MS studies. For Ind2 (tetramethine indocarbocyanine cationic dye), the limit of detection for nitrite is 0.50 µM within a linearity range of 1-13 µM. The developed method is sensitive, with a LOD 130 times lower than the maximum contaminant level (MCL) of nitrite in drinking water (65 μM), as specified by the WHO. The method is of low-toxicity and good selectivity, as the determination of nitrite is not significantly affected by the main components of water. The method was successfully applied for the analysis of nitrite in natural and bottled water.
Collapse
Affiliation(s)
- Andrii R Shabelko
- Taras Shevchenko National University of Kyiv 01601, Kyiv, Str. Volodymyrska, 64/13, Ukraine
| | - Nadiya A Derevyanko
- Institute of Organic Chemistry of the NAS of Ukraine, 02660 Kyiv, Str. Akademika Kuharya,5, Ukraine
| | - Alexander A Ishchenko
- Institute of Organic Chemistry of the NAS of Ukraine, 02660 Kyiv, Str. Akademika Kuharya,5, Ukraine
| | - Oksana Yu Tananaiko
- Taras Shevchenko National University of Kyiv 01601, Kyiv, Str. Volodymyrska, 64/13, Ukraine.
| |
Collapse
|
2
|
Wang T, Niu J, Pang H, Meng X, Sun R, Xie J. Development of a Portable Residual Chlorine Detection Device with a Combination of Microfluidic Chips and LS-BP Algorithm to Achieve Accurate Detection of Residual Chlorine in Water. MICROMACHINES 2024; 15:1045. [PMID: 39203696 PMCID: PMC11356599 DOI: 10.3390/mi15081045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2024] [Revised: 08/06/2024] [Accepted: 08/16/2024] [Indexed: 09/03/2024]
Abstract
Chlorine is widely used for sterilization and disinfection of water, but the presence of excess residual chlorine in water poses a substantial threat to human health. At present, there is no portable device which can achieve accurate, rapid, low-cost, and convenient detection of residual chlorine in water. Therefore, it is necessary to develop a device that can perform accurate, rapid, low-cost, and convenient detection of residual chlorine in water. In this study, a portable residual chlorine detection device was developed. A microfluidic chip was studied to achieve efficient mixing of two-phase flow. This microfluidic chip was used for rapid mixing of reagents in the portable residual chlorine detection device, reducing the consumption of reagents, detection time, and device volume. A deep learning algorithm was proposed for predicting residual chlorine concentration in water, achieving precise detection. Firstly, the microfluidic chip structure for detecting mixed reagents was optimized, and the microfluidic chip was fabricated by a 3D-printing method. Secondly, a deep learning (LS-BP) algorithm was constructed and proposed for predicting residual chlorine concentration in water, which can realize dual-channel signal reading. Thirdly, the corresponding portable residual chlorine detection device was developed, and the detection device was compared with residual chlorine detection devices and methods in other studies. The comparison results indicate that the portable residual chlorine detection device has high detection accuracy, fast detection speed, low cost, and good convenience. The excellent performance of the portable residual chlorine detection device makes it suitable for detecting residual chlorine in drinking water, swimming pool water, aquaculture and other fields.
Collapse
Affiliation(s)
- Tongfei Wang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (T.W.); (H.P.); (X.M.); (R.S.); (J.X.)
| | - Jiping Niu
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China
| | - Haoran Pang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (T.W.); (H.P.); (X.M.); (R.S.); (J.X.)
| | - Xiaoyu Meng
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (T.W.); (H.P.); (X.M.); (R.S.); (J.X.)
| | - Ruqian Sun
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (T.W.); (H.P.); (X.M.); (R.S.); (J.X.)
| | - Jiaqing Xie
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (T.W.); (H.P.); (X.M.); (R.S.); (J.X.)
| |
Collapse
|
3
|
Kant T, Shrivas K, Tejwani A, Tandey K, Sharma A, Gupta S. Progress in the design of portable colorimetric chemical sensing devices. NANOSCALE 2023; 15:19016-19038. [PMID: 37991896 DOI: 10.1039/d3nr03803c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
The need for precise determination of heavy metals, anions, biomolecules, pesticides, drugs, and other substances is vital across clinical, environmental, and food safety domains. Recent years have seen significant progress in portable colorimetric chemical sensing devices, revolutionizing on-the-spot analysis. This review offers a comprehensive overview of these advancements, covering handheld colorimetry, RGB-based colorimetry, paper-based colorimetry, and wearable colorimetry devices. It explores the underlying principles, functional materials (chromophoric reagents/dyes and nanoparticles), detection mechanisms, and their applications in environmental monitoring, clinical care, and food safety. Noble metal nanoparticles (NPs) have arisen as promising substitutes in the realm of sensing materials. They display notable advantages, including heightened sensitivity, the ability to fine-tune their plasmonic characteristics for improved selectivity, and the capacity to induce visible color changes, and simplifying detection. Integration of NPs fabricated paper device with smartphones and wearables facilitates reagent-free, cost-effective, and portable colorimetric sensing, enabling real-time analysis and remote monitoring.
Collapse
Affiliation(s)
- Tushar Kant
- Shaheed Kawasi Rodda Pedda, Govt. College Kuakonda, Dantewada-494552, CG, India.
| | - Kamlesh Shrivas
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492010, CG, India.
| | - Ankita Tejwani
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492010, CG, India.
| | - Khushali Tandey
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur-492010, CG, India.
| | - Anuradha Sharma
- Department of Zoology, Govt. Nagarjuna P.G. College of Science, Raipur-492010, CG, India
| | - Shashi Gupta
- Department of Zoology, Govt. Nagarjuna P.G. College of Science, Raipur-492010, CG, India
| |
Collapse
|
4
|
Nario NA, Vidal E, Grünhut M, Domini CE. 3D-printed device for the kinetic determination of As(III) in groundwater samples by digital movie analysis. Talanta 2023; 261:124625. [PMID: 37201338 DOI: 10.1016/j.talanta.2023.124625] [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: 02/07/2023] [Revised: 04/30/2023] [Accepted: 05/01/2023] [Indexed: 05/20/2023]
Abstract
High concentrations of inorganic arsenic in groundwater for human consumption is a worldwide common problem. Particularly, the determination of As(III) becomes important, since this species is more toxic than organic, pentavalent and elemental arsenic forms. In this work, a 3D-printed device that included a 24-well microplate was developed to perform the colourimetric kinetic determination of arsenic (III) by digital movie analysis. A smartphone camera attached to the device was used to take the movie during the process where As(III) inhibited the decolourization of methyl orange. The movie images were subsequently transformed from RGB to YIQ space to obtain a new analytical parameter called "d", which was related to the chrominance of the image. Then, this parameter allowed the determination of the inhibition time of reaction (tin), which was linearly correlated with the concentration of As(III). A linear calibration curve (R = 0.9995) in the range from 5 μg L-1 to 200 μg L-1 was obtained. The method was precise (RSD = 1.2%), and the limits of detection (LOD) and quantification (LOQ) were 1.47 μg L-1 and 4.44 μg L-1, respectively. These values were lower than the limit established by the World Health Organization for total arsenic in drinking water (10 μg L-1). The accuracy of the method was assessed by a recovery study with optimal results (94.3%-104.0%). Additionally, the Analytical GREEnness metric approach was applied, obtaining a score 1.7 times higher than previously published works. The method is simple, portable and low-cost, being in compliance with various principles of green analytical chemistry.
Collapse
Affiliation(s)
- Nicolás A Nario
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional Del Sur, Av. Alem 1253, B8000CPB, Bahía Blanca, Argentina
| | - Ezequiel Vidal
- Department of Chemistry, Universidad Nacional Del Sur, Av. Alem 1253, B8000CPB, Bahía Blanca, Argentina
| | - Marcos Grünhut
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional Del Sur, Av. Alem 1253, B8000CPB, Bahía Blanca, Argentina.
| | - Claudia E Domini
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional Del Sur, Av. Alem 1253, B8000CPB, Bahía Blanca, Argentina.
| |
Collapse
|
5
|
A new ultrasound-assisted liquid-liquid microextraction method utilizing a switchable hydrophilicity solvent for spectrophotometric determination of nitrite in food samples. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
|
6
|
Silva GME, Garcia JA, Garitta JDA, Cunha DGF, Finkler NR, Mendiondo EM, Ghiglieno F. Smartphone-based spectrometry system as a prescreening assessment of copper and iron for real time control of water pollution. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116214. [PMID: 36115238 DOI: 10.1016/j.jenvman.2022.116214] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 09/05/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Due to anthropogenic actions, the presence of pollutants in water bodies, such as toxic metals, are increasingly negatively affecting water quality, biodiversity and sustainable goals worldwide. Therefore, decentralization of water pollution monitoring with low-cost devices, such as using smartphones, suggests an innovative green technology for in situ and real-time control. In this study, a Handheld Smartphone Spectrophotometry System (HSSS) was developed to estimate copper and iron concentration water samples. The system mainly comprises a portable commercial spectrometer (GoSpectro) that can measure the spectrum of light in the visible region. The HSSS LOD and LOQ for copper were equal to 0.589 and 1.784 mg/L, respectively, and 0.479 and 1.450 mg/L, respectively for iron. In addition, the results of copper and iron concentrations in samples with unknown concentrations using HSSS were close to the Benchtop Spectrophometer (BS). Finally, HSSS performance showed to be a new green technology for water quality management with potential applications for monitoring water resources and also providing further possibilities to measure other pollutants by the same technique, in addition to metals.
Collapse
Affiliation(s)
- Gabriel Marinho E Silva
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
| | | | | | - Davi Gasparini Fernandes Cunha
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Nícolas Reinaldo Finkler
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Eduardo Mario Mendiondo
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Filippo Ghiglieno
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil; Department of Physics, Federal University of São Carlos, São Carlos, SP, Brazil
| |
Collapse
|
7
|
Shahvalinia M, Larki A, Ghanemi K. Smartphone-based colorimetric determination of triclosan in aqueoussamples after ultrasound assisted-dispersive liquid-liquid microextraction under optimized response surface method conditions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 278:121323. [PMID: 35526443 DOI: 10.1016/j.saa.2022.121323] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/13/2022] [Accepted: 04/25/2022] [Indexed: 06/14/2023]
Abstract
In the present study, a simple and low cost methodology based on ultrasonic assisted-dispersive liquid-liquid microextraction (UA-DLLME) followed by smartphone-based colorimetric measurement was introduced for the separation and determination of Triclosan (TCS) from contaminated waters. This method is based on the formation of an azo compound from the alkaline reaction of TCS with a diazonium ion, resulting from the reaction of sodium nitrite and p-sulfanilic acid in an acidic medium. The orange-brown color product was extracted into a low volume of organic phase by UA-DLLME method and RGB values were recorded with free Android app Color Grab. The effective parameters in this procedure, namely solution pH, p-sulfanilic acid and nitrite concentration, reaction time and volume of the extraction solvent were investigated and optimized by response surface methodology (RSM) based on a Box-Behnken design (BBD) model. Under optimum conditions, the calibration graph was linear in the range of 3.0 and 200 μg L-1 of TCS. The limit of detection (LOD) and limit of quantification (LOQ) were 0.8 and 2.7 μg L-1, respectively. The proposed method was successfullyused for the analyses of triclosan in several water and wastewater samples and satisfactory results were obtained.
Collapse
Affiliation(s)
- Monireh Shahvalinia
- Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
| | - Arash Larki
- Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.
| | - Kamal Ghanemi
- Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
| |
Collapse
|
8
|
Catalan-Carrio R, Saez J, Fernández Cuadrado LÁ, Arana G, Basabe-Desmonts L, Benito-Lopez F. Ionogel-based hybrid polymer-paper handheld platform for nitrite and nitrate determination in water samples. Anal Chim Acta 2022; 1205:339753. [DOI: 10.1016/j.aca.2022.339753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/04/2022] [Accepted: 03/20/2022] [Indexed: 11/01/2022]
|
9
|
El Hani O, Karrat A, Digua K, Amine A. Development of a simplified spectrophotometric method for nitrite determination in water samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120574. [PMID: 34772633 DOI: 10.1016/j.saa.2021.120574] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/20/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
A new eco-friendly, rapid, and sensitive spectrophotometric method was developed to determine small quantities of nitrite, based on a diazotization mechanism. In an acidic solution, sulfathiazole was first diazotized with sodium nitrite, followed by adding phosphate buffer to form a yellow-colored compound, which showed maximum absorption at 450 nm, without the need for the addition of coupling agents such as N-(1-naphthyl) ethylenediamine. The effects of reagents amount and the optimal experimental conditions were examined by Central composite design. The simplified method presented a wide linear range of nitrite between 0.091 μg mL-1 and 1.47 μg mL-1, a sensitivity of 0.447 Abs mL µg-1, a determination coefficient of 0.998, and a low limit of detection of 0.053 μg mL-1. The simplified method was found to be comparable to the Griess method. It was evaluated for the measurements of nitrite using the accuracy profile approach. The validation procedure results established that 80% of the future results would be within the acceptability limit of 10% over the validation domain ranging from 0.174 μg mL-1 to 1.37 μg mL-1. The developed method was furtherly applied in the determination of nitrite using a developed paper-based analytical device that detected a nitrite concentration of 3 μg mL-1 which is considered by the World Health Organization to be the maximal permissible limit of nitrite in drinking water.
Collapse
Affiliation(s)
- Ouarda El Hani
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P. A. 146., Mohammedia, Morocco
| | - Abdelhafid Karrat
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P. A. 146., Mohammedia, Morocco
| | - Khalid Digua
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P. A. 146., Mohammedia, Morocco
| | - Aziz Amine
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P. A. 146., Mohammedia, Morocco.
| |
Collapse
|
10
|
Sáez-Hernández R, Mauri-Aucejo AR, Morales-Rubio A, Pastor A, Cervera ML. Phosphate determination in environmental, biological and industrial samples using a smartphone as a capture device. NEW J CHEM 2022. [DOI: 10.1039/d1nj05425b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A lab-made device was built to analyse phosphate in four different matrices using a smartphone as a capturing device.
Collapse
Affiliation(s)
- Roberto Sáez-Hernández
- Department of Analytical Chemistry, University of Valencia, Dr Moliner, 50, Burjassot, València, Spain
| | - Adela R. Mauri-Aucejo
- Department of Analytical Chemistry, University of Valencia, Dr Moliner, 50, Burjassot, València, Spain
| | - Angel Morales-Rubio
- Department of Analytical Chemistry, University of Valencia, Dr Moliner, 50, Burjassot, València, Spain
| | - Agustin Pastor
- Department of Analytical Chemistry, University of Valencia, Dr Moliner, 50, Burjassot, València, Spain
| | - M. L. Cervera
- Department of Analytical Chemistry, University of Valencia, Dr Moliner, 50, Burjassot, València, Spain
| |
Collapse
|
11
|
Cai R, Lu D, She Q, You R, Feng S, Lin X, Lu Y. Reusable 3D silver superposed silica SERS substrate based on the Griess reaction for the ratiometric detection of nitrite. Anal Bioanal Chem 2021; 413:4751-4761. [PMID: 34132820 DOI: 10.1007/s00216-021-03429-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/26/2021] [Accepted: 05/21/2021] [Indexed: 10/21/2022]
Abstract
When nitrite is ingested and absorbed by the body, it can be converted into highly toxic nitrosamines (carcinogens, teratogens, and mutagens), posing health risks to the general population. Therefore, it calls for establishing a method for determination of nitrite. In this paper, the glass-SiO2-Ag surface-enhanced Raman scattering (SERS) substrate with a large number of "hot spots" were prepared by two kinds of silane coupling agents. The SERS substrate had high sensitivity and repeatability. Silicon dioxide supported the silver nanoparticles (Ag NPs), which increased surface roughness of the substrate, generated a great quantity of hot spots and enhanced the SERS signal. In the SERS spectrum, the intensity ratio of the two characteristic peaks (1287 cm-1 and 1076 cm-1) had a good linear correlation with the logarithm of the concentration of nitrite, R2 = 0.9652. The recoveries of 50 μM and 100 μM nitrite in three kinds of foods, three kinds of cosmetics and tap water were 90.9-105.3%.
Collapse
Affiliation(s)
- Rongyuan Cai
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Dechan Lu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China.,Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350117, Fujian, China
| | - Qiutian She
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Ruiyun You
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Shangyuan Feng
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350117, Fujian, China
| | - Xueliang Lin
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350117, Fujian, China
| | - Yudong Lu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, 350007, Fujian, China.
| |
Collapse
|
12
|
Use of universal 3D-Printed smartphone spectrophotometer to develop a time-based analysis for hypochlorite. Anal Chim Acta 2021; 1151:338249. [PMID: 33608080 DOI: 10.1016/j.aca.2021.338249] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/13/2021] [Accepted: 01/19/2021] [Indexed: 12/18/2022]
Abstract
A fully-functional smartphone-based spectrophotometer was designed and built using 3D printing. The major advantage of this approach is its capacity to be interfaced with a variety of smartphones, allowing the use of the smartphone's camera and display, and regardless of the relative position of the camera. The analytical performance of the device was analyzed using a model dye (crystal violet), leading to a proportional response for concentrations in the 0.06-15.0 mg L-1 range, with a variability of 1.0% (intra-day) and 2.6% (inter-day). To demonstrate the functionality of the device, the degradation process of the dye by sodium hypochlorite was studied. The results obtained were applied to develop a paper-based test for NaClO in sanitation solutions, in which the time required to bleach the dye was used to estimate the concentration of the solution. This device represents a simple and inexpensive tool for everyday laboratory use and could address important analytical challenges in low-income communities and features a versatile arrangement, that is compatible with a wide variety of smartphones and software platforms.
Collapse
|
13
|
Silver-miang nanocomposites: A green, rapid and simple approach for selective determination of nitrite in water and meat samples. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
14
|
Electrochemical sensor for nitrite detection in water samples using flexible laser-induced graphene electrodes functionalized by CNT decorated by Au nanoparticles. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114893] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
15
|
Koohkan R, Kaykhaii M, Sasani M, Paull B. Fabrication of a Smartphone-Based Spectrophotometer and Its Application in Monitoring Concentrations of Organic Dyes. ACS OMEGA 2020; 5:31450-31455. [PMID: 33324857 PMCID: PMC7726945 DOI: 10.1021/acsomega.0c05123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 11/04/2020] [Indexed: 06/12/2023]
Abstract
In this study, an in-house constructed paper-based spectrophotometer is presented and demonstrated for detecting three organic dyes, namely, methylene blue, malachite green, and rhodamine B, and monitoring the efficiency of their removal from a wastewater sample with Sistan sand as a costless adsorbent. The compact design and light weight of this simple spectrophotometer delivered portability, with materials costing less than a dollar. Spectral analysis of the captured images was performed using free downloadable software from the Google Play store. The main experimental parameters affecting the efficiency of dye adsorption including pH, sorbent dosage, initial dye concentration, and contact time were investigated and optimized using the Taguchi design experimental method. Validation experiments were performed using a standard commercial bench-top spectrophotometer, and results were compared in terms of analytical performance, speed, and cost of analysis. The smartphone-based spectrometer was able to measure accurately, as confirmed using the commercial spectrometer, with enhanced sensitivity for methylene blue and rhodamine B. The combination of the high spectral accuracy of the paper-based spectrophotometer, together with sand as a readily accessible sorbent, enabled us to develop a powerful yet simple approach and tool for the removal and monitoring of dyes within wastewater samples, which is potentially available to everybody who owns a smartphone.
Collapse
Affiliation(s)
- Razieh Koohkan
- Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan 98135, Iran
| | - Massoud Kaykhaii
- Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan 98155-674, Iran
- Smartphone Analytical Sensors Research
Centre, University of Sistan and Baluchestan, Zahedan 98135-674, Iran
| | - Mojtaba Sasani
- Research Laboratory of Spectrometry &
Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16844, Iran
- Young Researchers and Elite Club, Zahedan Branch, Islamic Azad University, Zahedan 1584743311, Iran
| | - Brett Paull
- Australian Centre for Research on Separation Science
(ACROSS), School of Natural Sciences, University
of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
| |
Collapse
|