1
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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.
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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.
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2
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Development of a Simple and Accurate Analytical Method for the Determination of Nitrite in Processed Meat Products by Using an Optical Solid Chemosensor and Smartphone. FOOD ANAL METHOD 2021. [DOI: 10.1007/s12161-021-02155-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Ledezma-Zamora K, Sánchez-Gutiérrez R, Ramírez-Leiva A, Mena-Rivera L. Residual nitrite in processed meat products in Costa Rica: Method validation, long-term survey and intake estimations. Food Chem 2021; 361:130082. [PMID: 34029910 DOI: 10.1016/j.foodchem.2021.130082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 03/29/2021] [Accepted: 05/08/2021] [Indexed: 10/21/2022]
Abstract
Ingestion of high amounts of nitrite due processed meat consumption could produce negative effects in human health. Here, we investigate long-term residual sodium nitrite content in processed meat products in Costa Rica to provide the first estimations of nitrite daily intake. An extensively validated analytical procedure was applied for the long-term analysis of 1350 samples from 2014 to 2018. Mean residual sodium nitrite concentration was 76.5 mg kg-1, ranging from < 11 to 278.0 mg kg-1. Significant differences among product and meat types were found, but no temporal differences were observed. Nitrite daily intake was estimated in 0.0122 ± 0.0039 mg kg-1 bw-1 d-1, which accounts for 17.4% of the acceptable daily intake (ADI). This information underlies the importance of studying residual nitrite kinetics in processed meat products as well as establishing long-term programs for the accurate estimation of nitrite daily intake rates.
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Affiliation(s)
- Kimberly Ledezma-Zamora
- Laboratory of Chemical Analysis, School of Chemistry, Universidad Nacional, Heredia 86-3000, Costa Rica.
| | | | - Ailyn Ramírez-Leiva
- Laboratory of Chemical Analysis, School of Chemistry, Universidad Nacional, Heredia 86-3000, Costa Rica
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4
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Li YS, Zhao CL, Li BL, Gao XF. Evaluating nitrite content changes in some Chinese home cooking with a newely-developed CDs diazotization spectrophotometry. Food Chem 2020; 330:127151. [DOI: 10.1016/j.foodchem.2020.127151] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/04/2020] [Accepted: 05/24/2020] [Indexed: 12/28/2022]
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5
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Abd Hamid NFH, Khan MM, Lim LH. Assessment of nitrate, nitrite and chloride in selected cured meat products and their exposure to school children in Brunei Darussalam. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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de Oliveira LMA, Dos Santos VB, da Silva EKN, Lopes AS, Dantas-Filho HA. An environment-friendly spot test method with digital imaging for the micro-titration of citric fruits. Talanta 2019; 206:120219. [PMID: 31514888 DOI: 10.1016/j.talanta.2019.120219] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/26/2019] [Accepted: 08/01/2019] [Indexed: 12/17/2022]
Abstract
A new method to determine the total titratable acidity of orange, lemon and passion fruit, based on a spot test obtained from digital images and using anthocyanins as the biodegradable indicator, is presented for the first time. The colorimetric reactions were carried out by acid-base titration on a microscale, employing anthocyanin with a microplate for spot test purposes, with detection by digital imaging. To obtain highly precise data, a chamber based on a diffuser was developed to control the illumination supplied by the light emitting diodes, and coupled to a smartphone to acquire adequate digital images. High precision was obtained with a relative standard deviation of 0.758% for n = 95. The RGB values were extracted from the digital images and used as analytical signals, the values being correlated with the micro-volume of the titrant and used to construct the titration curves and obtain the first and second derivatives, respectively. For comparative purposes, the official AOAC (Association of Official Analytical Chemists) and MAPA (Ministry of Agriculture, Livestock and Food Supply of Brazil) methods were used and the results compared by applying the paired t-test at the 95% confidence level (n = 3). No difference was found between the values and the relative errors were less than 2.8%. The micro-titrimetric method was fast, uses anthocyanins as the natural indicator, is practical, and permits a reduction of 922 times or 99.9% of the volume required in a conventional titration. It is therefore ideal for routine analyses leading to a reduction in the waste generated, according to the principles of green chemistry.
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Affiliation(s)
| | - Vagner Bezerra Dos Santos
- Institute of Exact and Natural Science, Federal University of Pará, Belém, PA, Brazil; Fundamental Chemistry Department, Federal University of Pernambuco, Recife, PE, Brazil.
| | - Emelle K N da Silva
- Institute of Exact and Natural Science, Federal University of Pará, Belém, PA, Brazil
| | - Alessandra Santos Lopes
- Faculty of Food Engineering (FEA), Institute of Technology (ITEC), Federal University of Pará (UFPA), 66075-110, Belém, Pará, Brazil
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7
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Azeem SMA, Madbouly MD, El-Shahat MF. Determination of Nitrite in Processed Meat Using Digital Image Method and Powdered Reagent. J Food Compost Anal 2019. [DOI: 10.1016/j.jfca.2019.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Silvestre ALP, Milani MI, Rossini EL, Pezza L, Pezza HR. A paper platform for colorimetric determination of aluminum hydrochloride in antiperspirant samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:432-435. [PMID: 29966896 DOI: 10.1016/j.saa.2018.06.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/11/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
A simple, fast, low-cost, portable, and eco-friendly method using a spot test on a paper platform, together with diffuse reflectance spectroscopy, was developed and validated for the quantification of aluminum hydrochloride, a potential neurotoxic agent, in antiperspirant samples. The determination of aluminum hydrochloride was performed at a wavelength of 615 nm, by measuring consumption of the purple colorimetric reagent Alizarin S, due to reaction with aluminum. The linear range was from 10.0 to 125.0 mg L-1 and could be described by the equation: AR = 0.4479 - 0.002543 CAl (R = 0.999). The limits of detection (LOD) and quantification (LOQ) were 3.06 and 10.2 mg L-1, respectively. The method was specific, accurate, and repeatable, with relative standard deviation (RSD) <5.0%. The recovery was between 92.2 and 103.4%. The method was successfully used for the determination of aluminum hydrochloride in commercial antiperspirant samples, revealing concentrations below the maximum permitted by current legislation.
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Affiliation(s)
- Amanda Letícia Polli Silvestre
- Instituto de Química, Universidade Estadual Paulista "Julio de Mesquita Filho", UNESP, R. Prof. Francisco Degni 55, P.O. Box 355, 14800-900 Araraquara, SP, Brazil
| | - Maria Izabel Milani
- Instituto de Química, Universidade Estadual Paulista "Julio de Mesquita Filho", UNESP, R. Prof. Francisco Degni 55, P.O. Box 355, 14800-900 Araraquara, SP, Brazil
| | - Eduardo Luiz Rossini
- Instituto de Química, Universidade Estadual Paulista "Julio de Mesquita Filho", UNESP, R. Prof. Francisco Degni 55, P.O. Box 355, 14800-900 Araraquara, SP, Brazil
| | - Leonardo Pezza
- Instituto de Química, Universidade Estadual Paulista "Julio de Mesquita Filho", UNESP, R. Prof. Francisco Degni 55, P.O. Box 355, 14800-900 Araraquara, SP, Brazil
| | - Helena Redigolo Pezza
- Instituto de Química, Universidade Estadual Paulista "Julio de Mesquita Filho", UNESP, R. Prof. Francisco Degni 55, P.O. Box 355, 14800-900 Araraquara, SP, Brazil.
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9
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Fluorescence quenching capillary analysis for determining trace-level nitrite in food based on the citric acid/ethylenediamine nanodots/nitrite reaction. Food Chem 2018; 274:162-169. [PMID: 30372922 DOI: 10.1016/j.foodchem.2018.08.112] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 08/11/2018] [Accepted: 08/24/2018] [Indexed: 12/17/2022]
Abstract
We found that nitrite after protonation can react with amine radical on citric acid/ethylenediamine carbon nanodots (CA/EDA-CDs) to form nitrosamines, and fluorescence quenching of CA/EDA-CDs occurred during this process. Using the reaction mechanism a fluorescence quenching capillary analysis (FQCA) was developed. After optimized reaction conditions, the following results were obtained: the required concentration of CA/EDA-CDs was 12 mg/L, HCl concentration was 32 mmol/L, and the reaction conducted in room temperature for 20 min. Under optimized conditions, FQCA has a linear response in 20-500 μg/L in which RSD was less 4.5% (n = 11), the detection limit was 6.5 μg/L and the recovery was in 95-105%. The measured results were consistent with the national standard method. FQCA has been used for determining nitrite in foods and nature waters. The capillary in FQCA was used as the container for CA/EDA-CDs/NO2- reaction and NO2- determination, and realized trace-level analysis for micro-volume samples (<10 μL/time).
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10
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Preconcentration and indirect quantification of trace nitrite, nitrate and total nitrite in selected beverage and milk samples using ion-pairing cloud-point extraction with acridine orange. J Food Compost Anal 2018. [DOI: 10.1016/j.jfca.2018.03.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Toledo PRAB, Toci AT, Pezza HR, Pezza L. Green Determination of Urea in Moisturizers by Diffuse Reflectance Spectroscopy. ANAL LETT 2017. [DOI: 10.1080/00032719.2016.1255223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Aline Theodoro Toci
- Latin American Institute of Science of Life and Nature, Federal University of Latin American Integration – UNILA, Paraná, Brazil
| | | | - Leonardo Pezza
- Institute of Chemistry, São Paulo State University – UNESP, São Paulo, Brazil
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12
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Cheng D, Zhang X, Li X, Hou L, Wang C. Determination of Aluminum in Edible Jellyfish Using Chrome Azurol S with Spot Test on Filter Paper. ANAL SCI 2017; 33:185-189. [PMID: 28190838 DOI: 10.2116/analsci.33.185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Aluminum (Al) has been well known as an environmental factor that may affect several enzymes and other biomolecules related to Alzheimer's disease. The increasing use of Al in the preparation and storage of food currently represents the main form of Al exposure for the general public. The present study was aimed to develop a household procedure for the rapid test determination of Al in edible jellyfish. The method was developed based on the reaction of Chrome Azurol S with Al in acidic medium, forming a colored compound on the surface of filter paper. Experimental design methodologies were used to optimize the measurement conditions. The proposed method was applied successfully to the analysis of Al in edible jellyfish products in clinical laboratory and household settings.
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Affiliation(s)
- Dai Cheng
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology
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13
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Greenawald LA, Boss GR, Reeder A, Bell S. Development of a Hydrogen Sulfide End-of-Service-Life Indicator for Respirator Cartridges Using Cobinamide. SENSORS AND ACTUATORS. B, CHEMICAL 2016; 230:658-666. [PMID: 27022206 PMCID: PMC4807636 DOI: 10.1016/j.snb.2016.02.129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An inexpensive paper-based sensor was developed for detecting low ppm concentrations of hydrogen sulfide gas. A piece of filter paper containing aquohydroxocobinamide [OH(H2O)Cbi] was placed on the end of a bifurcated optical fiber, and the reflectance spectrum of the OH(H2O)Cbi was monitored during exposure to 10.0 ppm hydrogen sulfide gas (NIOSH recommended exposure limit). Reaction of sulfide (HS-) yielded an increase in reflectance from 400-450 nm, and decrease from 470-550 nm. Spectral changes were monitored as a function of time at 25, 50, and 85% relative humidity. Spectral shifts at high-er humidity suggested reduction of the Cbi(III) compound. The sensor was used to detect hydrogen sulfide breakthrough from respirator carbon beds and results correlated well with a standard electrochemical detector. The simple paper-based sensor could provide a real-time end-of-service-life alert for hydrogen sulfide gas.
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14
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Noor NSM, Tan LL, Heng LY, Chong KF, Tajuddin SN. Acrylic microspheres-based optosensor for visual detection of nitrite. Food Chem 2016; 207:132-8. [PMID: 27080889 DOI: 10.1016/j.foodchem.2016.03.088] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 03/21/2016] [Accepted: 03/28/2016] [Indexed: 10/22/2022]
Abstract
A new optosensor for visual quantitation of nitrite (NO2(-)) ion has been fabricated by physically immobilizing Safranine O (SO) reagent onto a self-adhesive poly(n-butyl acrylate) [poly(nBA)] microspheres matrix, which was synthesized via facile microemulsion UV lithography technique. Evaluation and optimization of the optical NO2(-) ion sensor was performed with a fiber optic reflectance spectrophotometer. Scanning electron micrograph showed well-shaped and smooth spherical morphology of the poly(nBA) microspheres with a narrow particles size distribution from 0.6 μm up to 1.8 μm. The uniform size distribution of the acrylic microspheres promoted homogeneity of the immobilized SO reagent molecules on the microspheres' surfaces, thereby enhanced the sensing response reproducibility (<5% RSD) with a linear range obtained from 10 to 100 ppm NO2(-) ion. The micro-sized acrylic immobilization matrix demonstrated no significant barrier for diffusion of reactant and product, and served as a good solid state ion transport medium for reflectometric nitrite determination in food samples.
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Affiliation(s)
- Nur Syarmim Mohamed Noor
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang Darul Makmur, Malaysia.
| | - Ling Ling Tan
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI-UKM), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia.
| | - Lee Yook Heng
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI-UKM), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia.
| | - Kwok Feng Chong
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang Darul Makmur, Malaysia.
| | - Saiful Nizam Tajuddin
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang Darul Makmur, Malaysia.
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15
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Yuan Y, Huang X, Liu S, Yang J, Duan R, Hu X. Determination of hypochlorite by quenching the fluorescence of 1-pyrenylboronic acid in tap water. RSC Adv 2016. [DOI: 10.1039/c5ra23367d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
In neutral conditions, a new probe based on the oxidative conversion of 1-pyrenylboronic acid to 1-hydroxypyrene was established for the fluorescence signaling of practical hypochlorite.
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Affiliation(s)
- Yusheng Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Xin Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Shaopu Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Jidong Yang
- College of Chemical and Environmental Engineering
- Chongqing Three Gorges University
- Chongqing 404100
- China
| | - Ruilin Duan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Xiaoli Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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16
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Greenawald LA, Snyder JL, Fry NL, Sailor MJ, Boss GR, Finklea HO, Bell S. Development of a cobinamide-based end-of-service-life indicator for detection of hydrogen cyanide gas. SENSORS AND ACTUATORS. B, CHEMICAL 2015; 221:379-385. [PMID: 26213448 PMCID: PMC4511729 DOI: 10.1016/j.snb.2015.06.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We describe an inexpensive paper-based sensor for rapid detection of low concentrations (ppm) of hydrogen cyanide gas. A piece of filter paper pre-spotted with a dilute monocyanocobinamide [CN(H2O)Cbi] solution was placed on the end of a bifurcated optical fiber and the reflectance spectrum of the CN(H2O)Cbi was monitored during exposure to 1.0-10.0 ppm hydrogen cyanide gas. Formation of dicyanocobinamide yielded a peak at 583 nm with a simultaneous decrease in reflectance from 450-500 nm. Spectral changes were monitored as a function of time at several relative humidity values: 25, 50, and 85% relative humidity. With either cellulose or glass fiber papers, spectral changes occurred within 10 s of exposure to 5.0 ppm hydrogen cyanide gas (NIOSH recommended short-term exposure limit). We conclude that this sensor could provide a real-time end-of-service-life alert to a respirator user.
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Affiliation(s)
- Lee A. Greenawald
- Centers for Disease Control and Prevention/National Institute for Occupational Safety and Health/National Personal Protective Technology Laboratory (CDC/NIOSH/NPPTL), 1095 Willowdale Road, Morgantown, WV 26505, USA
- Corresponding author. (L.A. Greenawald)
| | | | - Nicole L. Fry
- Department of Chemistry and Biochemistry, 9500 Gilman Drive, University of California, San Diego, La Jolla, CA 92093, USA
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry, 9500 Gilman Drive, University of California, San Diego, La Jolla, CA 92093, USA
| | - Gerry R. Boss
- Department of Medicine, 9500 Gilman Drive, University of California, San Diego, La Jolla, CA 92093, USA
| | - Harry O. Finklea
- C. Eugene Bennett Department of Chemistry, 217 Clark Hall, West Virginia University, Morgantown, WV 26506, USA
| | - Suzanne Bell
- C. Eugene Bennett Department of Chemistry, 217 Clark Hall, West Virginia University, Morgantown, WV 26506, USA
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17
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WITHDRAWN: Preconcentration and indirect quantification of trace nitrite, nitrate and total nitrite in selected beverage and milk samples using ion-pairing cloud-point extraction with acridine orange. J Food Compost Anal 2015. [DOI: 10.1016/j.jfca.2015.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Menart E, Jovanovski V, Hočevar SB. Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.01.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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19
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Daneshvar Tarigh G, Shemirani F. Development of a selective and pH-independent method for the analysis of ultra trace amounts of nitrite in environmental water samples after dispersive magnetic solid phase extraction by spectrofluorimetry. Talanta 2014; 128:354-9. [PMID: 25059171 DOI: 10.1016/j.talanta.2014.05.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/06/2014] [Accepted: 05/11/2014] [Indexed: 10/25/2022]
Abstract
This paper describes an innovative and rapidly dispersive magnetic solid phase extraction spectrofluorimetry (DMSPE-FL) method for the analysis of trace amounts of nitrite in some environmental water samples. The method includes derivatization of aqueous nitrite with 2, 3-diaminonaphthalene (DAN), analysis of highly fluorescent 2, 3-naphthotriazole (NAT) derivative using spectrofluorimetry after DSPME. The novelty of our method is based on forming NAT that was independent with the pH-responsive and was adsorbed on MMWCNT by hydrophobic attractions in both acidic and basic media. The extraction efficiency of the sorbent was investigated by extraction of nitrite. The optimum extraction conditions for NO2(-) were obtained as of extraction time, 1.5 min; 10mg sorbent from 160 mL of the sample solution, and elution with 1 mL of acetone/KOH. Under the optimal conditions, the calibration curves were obtained in the range of 0.1-80 µg L(-1) (R(2)=0.999) and LOD (S/N=3) was obtained in 34 ng L(-1). Relative standard deviations (RSD) were 0.6 % (five replicates at 5 μg L(-1)). In addition, the feasibility of the method was demonstrated with extraction and determination of nitrite from some real samples containing tap, mineral, sea, rain, snow and ground waters, with the recovery in standard addition to real matrix of 94-102 % and RSDs of 1.8-10.6%.
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Affiliation(s)
- Ghazale Daneshvar Tarigh
- Department of Analytical Chemistry, University College of Science, University of Tehran, PO Box 14155-6455, Tehran, Iran.
| | - Farzaneh Shemirani
- Department of Analytical Chemistry, University College of Science, University of Tehran, PO Box 14155-6455, Tehran, Iran.
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20
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A non-diazotization-coupling reaction-based colorimetric determination of nitrite in tap water and milk. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2215-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Development and Optimization of a SERS Method for On-site Determination of Nitrite in Foods and Water. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9829-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Ait Ramdane-Terbouche C, Terbouche A, Djebbar S, Hauchard D. Electrochemical sensors using modified electrodes based on copper complexes formed with Algerian humic acid modified with ethylenediamine or triethylenetetramine for determination of nitrite in water. Talanta 2014; 119:214-25. [DOI: 10.1016/j.talanta.2013.10.049] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 10/20/2013] [Accepted: 10/22/2013] [Indexed: 11/29/2022]
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Yue Q, Sun L, Shen T, Gu X, Zhang S, Liu J. Synthesis of Fluorescent Gold Nanoclusters Directed by Bovine Serum Albumin and Application for Nitrite Detection. J Fluoresc 2013; 23:1313-8. [DOI: 10.1007/s10895-013-1265-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 07/01/2013] [Indexed: 11/28/2022]
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