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Baltzis D, Zacharis CK, Tsogas GZ, Tzanavaras PD. High-throughput and green optical sensing of thiocyanate in human saliva based on microplates and an overhead book scanner as detector. J Pharm Biomed Anal 2024; 248:116317. [PMID: 38936170 DOI: 10.1016/j.jpba.2024.116317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/29/2024]
Abstract
An instrumental-free, high-throughput assay has been developed for the quantification of thiocyanate in human saliva. The proposed green method is based on the rapid reaction of the analyte with Fe(III) under acidic pH in a microplates format to form a colored complex that is captured as an image by an overhead book scanner. Optimization included the effects of the amount concentration of Fe(III), acidity and reaction time / complex stability using a total volume of 300 μL per well. Validation towards the matrix effect was focused on the specific application and was performed using both artificial and human saliva. The linearity of the developed assay was up to 500 μM thiocyanate offering a lower limit of quantification (LLOQ) of 30 μM. The green potentials were evaluated by both the Green Analytical Procedure (GAPI) and Blue Applicability Grade (BAGI) indexes. The thiocyanate content in the saliva of non-smoking volunteers ranged between 750 and 1350 μΜ, while elevated concentrations were verified in smoking individuals (1860-3080 μΜ). Statistical agreement with a corroborative method was assessed using the Bland-Altman plot.
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Affiliation(s)
- Dimitrios Baltzis
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124, Greece.
| | - Constantinos K Zacharis
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, Aristotle University of Thessaloniki, 54124, Greece.
| | - George Z Tsogas
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124, Greece.
| | - Paraskevas D Tzanavaras
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124, Greece.
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2
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Hassan RO. Microextraction with smartphone detection of thiocyanate in saliva of tobacco smokers using paper-based analytical method. J Sep Sci 2024; 47:e2300596. [PMID: 37968809 DOI: 10.1002/jssc.202300596] [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: 08/19/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/17/2023]
Abstract
This study presents a novel, cost-effective approach involving spectrophotometric and smartphone paper-based (SPB) methods and a distinctive salting-out air-assisted dispersive microextraction procedure to quantify thiocyanate in saliva samples. The method relies on the inhibitory effect of thiocyanate on quinoneimine dye formation during the Emerson reaction with sodium hypochlorite. Spectrophotometry quantifies the extracted dye by monitoring quinoneimine color intensity reduction at 525 nm. In the SPB method, extracted dye is applied to a paper strip, a smartphone captures the colored paper, and an application analyzes red, green, and blue components. All analyte determination and extraction variables were explored. Both methods exhibit good linearity (10-100 μg/L) with a coefficient of determination of 0.9991 and a limit of detection of 7.5 μg/L for the spectrophotometric method, and a coefficient of determination of 0.9988 and a limit of detection of 8.8 μg/L for the SPB method. The calculated values for the enrichment factor and extraction recovery of the developed extraction methodology were 46% and 93%, respectively. The methods detect thiocyanate in saliva samples, producing results comparable to a validated method.
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Affiliation(s)
- Rebwar Omar Hassan
- Department of Chemistry, College of Science, Salahaddin University, Erbil, Kurdistan Region, Iraq
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3
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Li X, Ji Y, Zu T, Huang X, Wang J, Cao Y, Cui Z. Simultaneous determination of cyanide and thiocyanate in milk by GC-MS/MS using cetyltrimethylammonium bromide as both phase transfer catalyst and protein precipitant. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2023; 40:1025-1034. [PMID: 37410937 DOI: 10.1080/19440049.2023.2227742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/11/2023] [Accepted: 06/12/2023] [Indexed: 07/08/2023]
Abstract
A method was developed for simultaneous determination of cyanide and thiocyanate in milk by gas chromatography-tandem quadrupole mass spectrometry (GC-MS/MS). Cyanide and thiocyanate were derivatized with pentafluorobenzyl bromide (PFBBr) as PFB-CN and PFB-SCN, respectively. Cetyltrimethylammonium bromide (CTAB) was employed both as a phase transfer catalyst and a protein precipitant in the sample pretreatment, which facilitates the separation of the organic and aqueous phases, and greatly simplifies the pretreatment procedures to achieve simultaneous and rapid determination of cyanide and thiocyanate. Under the optimized conditions, the limits of detection (LODs) of cyanide and thiocyanate in milk were 0.006 mg/kg and 0.015 mg/kg, and the spiked recoveries ranged from 90.1% to 98.2% and from 91.8% to 98.9% with relative standard deviations (RSDs) less than 18.9% and 15.2%, respectively. The proposed method was validated as a simple, fast and highly sensitive method for the determination of cyanide and thiocyanate in milk.
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Affiliation(s)
- Xing Li
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
- Imported Science and Technology (Beijing) Co., Ltd, Beijing, P.R. China
| | - Yongyan Ji
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
- Department of Environmental Science & Engineering, Fudan University, Shanghai, P.R. China
| | - Tiehong Zu
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
| | - Xuezhe Huang
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
| | - Jing Wang
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
| | - Yanzhong Cao
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
| | - Zongyan Cui
- Technology Center of Qinhuangdao Customs, Qinhuangdao, P.R. China
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4
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Campanella B, Legnaioli S, Onor M, Benedetti E, Bramanti E. The Role of the Preanalytical Step for Human Saliva Analysis via Vibrational Spectroscopy. Metabolites 2023; 13:metabo13030393. [PMID: 36984834 PMCID: PMC10055013 DOI: 10.3390/metabo13030393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 03/10/2023] Open
Abstract
Saliva is an easily sampled matrix containing a variety of biochemical information, which can be correlated with the individual health status. The fast, straightforward analysis of saliva by vibrational (ATR-FTIR and Raman) spectroscopy is a good premise for large-scale preclinical studies to aid translation into clinics. In this work, the effects of saliva collection (spitting/swab) and processing (two different deproteinization procedures) were explored by principal component analysis (PCA) of ATR-FTIR and Raman data and by investigating the effects on the main saliva metabolites by reversed-phase chromatography (RPC-HPLC-DAD). Our results show that, depending on the bioanalytical information needed, special care must be taken when saliva is collected with swabs because the polymeric material significantly interacts with some saliva components. Moreover, the analysis of saliva before and after deproteinization by FTIR and Raman spectroscopy allows to obtain complementary biological information.
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Affiliation(s)
- Beatrice Campanella
- Institute of Chemistry of Organometallic Compounds (ICCOM), Consiglio Nazionale delle Ricerche(CNR), 56124 Pisa, Italy
| | - Stefano Legnaioli
- Institute of Chemistry of Organometallic Compounds (ICCOM), Consiglio Nazionale delle Ricerche(CNR), 56124 Pisa, Italy
| | - Massimo Onor
- Institute of Chemistry of Organometallic Compounds (ICCOM), Consiglio Nazionale delle Ricerche(CNR), 56124 Pisa, Italy
| | - Edoardo Benedetti
- Hematology Unit of Azienda Ospedaliero Universitaria Pisana (AOUP), 56100 Pisa, Italy
| | - Emilia Bramanti
- Institute of Chemistry of Organometallic Compounds (ICCOM), Consiglio Nazionale delle Ricerche(CNR), 56124 Pisa, Italy
- Correspondence: ; Tel.: +39-050-315-2293
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Wang G, Lv Z, Wang C, Chen D, Zhang X, Zhang L, Fan F, Fu Y, Wang T. A portable and miniaturized lab-on-fiber sensor based on a responsive Fabry-Perot resonance cavity for the detection of thiocyanate. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3766-3772. [PMID: 36106840 DOI: 10.1039/d2ay01110g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Thiocyanate (SCN-) detection is highly significant because of the toxicity of SCN-. Herein, a portable and miniaturized lab-on-fiber (LOF) sensor is reported for the detection of SCN- through integrating a Fabry-Perot (F-P) optical resonance cavity based on anionic-responsive metal-insulator-metal (MIM) onto an optical fiber tip. The responsive MIM optical resonance cavity is constructed with an intermediate cationic polymer brush layer (poly[2-(methacryloyloxy)ethyl] trimethylammonium chloride, PMETAC) and two silver layers via a facile in situ "layer-by-layer" construction method. When the fabricated LOF sensor was immersed in SCN- solutions, an obvious reflection dip shift can be observed, which is feasible for the quantitative detection of SCN-. What's more, the fabricated LOF sensor exhibits outstanding selectivity and anti-interference against other interfering anions. Furthermore, the fabricated LOF sensor also displays other excellent advantages endowed by the polymer brush film, such as a fast response rate and outstanding reproducibility. Therefore, it is believed that the fabricated miniaturized LOF sensor would show great potential as a portable sensor in future applications, such as environmental monitoring and clinical diagnosis.
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Affiliation(s)
- Guangrong Wang
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Zhixin Lv
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Chengyang Wang
- College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Dan Chen
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Xuemin Zhang
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Liying Zhang
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Fuqiang Fan
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Yu Fu
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
| | - Tieqiang Wang
- College of Science, Northeastern University, Shenyang 110819, P. R. China.
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6
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Sundaram E, Servarayan KL, Vasantha VS. Optical detection of thiocyanate in human saliva based on the colorimetric response of (2-(2-hydroxyphenyl)-1H-benzo[d]imidazol-5-yl)(phenyl) methanone (HBPM)/Co 2+ ions conjugate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 266:120423. [PMID: 34637987 DOI: 10.1016/j.saa.2021.120423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/18/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Simple colorimetric biosensor was designed for the quantification SCN- ions based on the principle of colorimetric reactions between Co2+ and SCN- ions reaction using synthesized chromophore (2-(2-hydroxyphenyl)-1H-benzo[d]imidazol-5-yl)(phenyl) methanone (HBPM)/Co2+ ions conjugate which was synthesized via greener ultrawave sonication method. The structural characterization of the HBPM chromophore was confirmed by using NMR, ESI-MASS spectral techniques and the photophysical properties, sensor studies were done by using UV-Vis Spectrophotometer. Our designed HBPM/Co2+ ions conjugates have selectively detected SCN- ions qualitatively and quantitatively in the presence of other human salivary interferents. As per clinical point of view, three different ranges of SCN- ions from 0.1 to 2 mM for normal, 3 to 10 mM for disease, and 100-600 µM for below normal ranges were tested successfully by our developed sensor and the LoD was calculated as 5.43 nM. The real potent application of the developed biosensor was tested in human salivary samples of both smokers and non-smokers under different ages and obtained results shown good agreement with existing clinical methods.
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Affiliation(s)
- Ellairaja Sundaram
- Dept. of Chemistry, Vivekananda College, Tiruvedakam West, Madurai 625 234, Tamil Nadu, India
| | - Karthika Lakshmi Servarayan
- Dept. of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 21, Tamil Nadu, India
| | - Vairathevar Sivasamy Vasantha
- Dept. of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 21, Tamil Nadu, India.
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A colorimetric paper-based optode sensor for highly sensitive and selective determination of thiocyanate in urine sample using cobalt porphyrin derivative. Talanta 2021; 231:122371. [PMID: 33965036 DOI: 10.1016/j.talanta.2021.122371] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/27/2022]
Abstract
In this work, a highly sensitive colorimetric paper-based optode for the determination of thiocyanate in urine samples was developed for the first time. The cocktail solution of the optode was composed of 5,10,15,20-tetrakis(4-octyloxyphenyl)porphyrin cobalt(II) complex (L), tridodecylmethylammonium chloride (TDMACl), 2-nitrophenyl octyl ether, and polyvinyl chloride as an ionophore, an ion exchanger, a plasticizer, and a polymer, respectively. The paper-based optode responded to thiocyanate by increasing the blue component in the RGB index and a visible change, with the naked-eye, of the optode color from pink to green was observed. From the central composite design, the optimized conditions that yielded the highest sensitivity were 4.70 mmol/kg TDMACl and 13.75 mmol/kg L. The developed optode sensor was highly selective and responded to thiocyanate over other anions, with a working range of 0.001-5 mM and with a coefficient of determination (R2) of 0.9915. The limits of detection using naked-eye and camera were determined to be 50.0 μM and 1.26 μM, respectively. In addition, the LOD and LOQ estimated from the standard deviation of the blank were 0.65 and 1.87 μM, respectively. Furthermore, this sensor was successfully applied to the detection of thiocyanate in urine samples from non-smokers and smokers. The results were in good agreement with the standard ion chromatography (IC) technique. This developed paper-based optode sensor was simple, low-cost, portable, and easy to use as a sensing device without any complicated instrument.
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8
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Paiva AC, Crucello J, de Aguiar Porto N, Hantao LW. Fundamentals of and recent advances in sorbent-based headspace extractions. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116252] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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9
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Vilbaste M, Tammekivi E, Leito I. Uncertainty contribution of derivatization in gas chromatography/mass spectrometric analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8704. [PMID: 31845399 DOI: 10.1002/rcm.8704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/29/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE The purpose of the current work is to realistically assess the uncertainty contribution in gas chromatography/mass spectrometry (GC/MS) analysis originating from less-than-ideal derivatization efficiency. METHODS As the exemplary analytical method a two-step derivatization method with KOH and BSTFA (N,O-bis(trimethylsilyl)trifluoroacetamide), applied for the analysis of fatty acid triglycerides (using real measurement data), was selected. The derivatization efficiencies were in the range 0.89-1.04. In this study, two approaches for bottom-up uncertainty evaluation were compared: the traditional GUM approach and the Monte Carlo method (MCM). Both were used with and without taking correlation between input quantities into account. RESULTS The most reliable uncertainty estimates were in the range 0.07-0.08 (expanded uncertainties at 95% coverage probability). A strong negative correlation was found between the slope and intercept of the calibration graph (r = -0.71) and it markedly influenced the uncertainty estimate of derivatization efficiency. The MCM was found to give somewhat higher uncertainty estimates, which are considered more realistic. CONCLUSIONS Derivatization directly affects the analysis result. Thus, in the case of this exemplary analysis, just derivatization alone (i.e. if all other uncertainty sources are neglected) causes relative expanded uncertainty around 8%, being thus an important and in some cases the dominant uncertainty contributor.
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Affiliation(s)
- Martin Vilbaste
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
| | - Eliise Tammekivi
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
| | - Ivo Leito
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
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10
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Dugheri S, Mucci N, Bonari A, Marrubini G, Cappelli G, Ubiali D, Campagna M, Montalti M, Arcangeli G. Liquid phase microextraction techniques combined with chromatography analysis: a review. ACTA CHROMATOGR 2020. [DOI: 10.1556/1326.2019.00636] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Sample pretreatment is the first and the most important step of an analytical procedure. In routine analysis, liquid–liquid microextraction (LLE) is the most widely used sample pre-treatment technique, whose goal is to isolate the target analytes, provide enrichment, with cleanup to lower the chemical noise, and enhance the signal. The use of extensive volumes of hazardous organic solvents and production of large amounts of waste make LLE procedures unsuitable for modern, highly automated laboratories, expensive, and environmentally unfriendly. In the past two decades, liquid-phase microextraction (LPME) was introduced to overcome these drawbacks. Thanks to the need of only a few microliters of extraction solvent, LPME techniques have been widely adopted by the scientific community. The aim of this review is to report on the state-of-the-art LPME techniques used in gas and liquid chromatography. Attention was paid to the classification of the LPME operating modes, to the historical contextualization of LPME applications, and to the advantages of microextraction in methods respecting the value of green analytical chemistry. Technical aspects such as description of methodology selected in method development for routine use, specific variants of LPME developed for complex matrices, derivatization, and enrichment techniques are also discussed.
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Affiliation(s)
- Stefano Dugheri
- 1 Industrial Hygiene and Toxicology Laboratory, Careggi University Hospital, Florence, Italy
| | - Nicola Mucci
- 2 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Alessandro Bonari
- 2 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | | | - Giovanni Cappelli
- 2 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Daniela Ubiali
- 3 Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Marcello Campagna
- 4 Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Manfredi Montalti
- 2 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Giulio Arcangeli
- 2 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
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Urbanowicz M, Sadowska K, Pijanowska DG, Pomećko R, Bocheńska M. Potentiometric Solid-Contact Ion-Selective Electrode for Determination of Thiocyanate in Human Saliva. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2817. [PMID: 32429165 PMCID: PMC7288078 DOI: 10.3390/s20102817] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 12/13/2022]
Abstract
A new solid-contact potentiometric ion-selective electrode for the determination of SCN- (SCN-ISE) has been described. Synthesized phosphonium derivative of calix[4]arene was used as a charged ionophore. The research included selection of the ion-selective membrane composition, determination of the ISEs metrological parameters and SCN-ISE application for thiocyanate determination in human saliva. Preparation of the ISEs included selection of a plasticizer for the ion-selective membrane composition and type of the electrode material. The study was carried out using ISE with liquid internal electrolyte (LE-ISE) and solid-contact electrodes made of glassy carbon (GC-ISE) and gold rods (Au-ISE). The best parameters were found for GC sensors for which the ion-selective membrane contained chloroparaffin as a plasticizer (S = 59.9 mV/dec, LOD = 1.6 ´ 10-6 M). The study of potentiometric selectivity coefficients has shown that the thiocyanate-selective sensor could be applied in biomedical research for determination of SCN- concentration in human saliva. The accuracy of the SCN- determination was verified by testing 59 samples of volunteers' saliva by potentiometric sensors and UV-Vis spectrophotometry as a reference technique. Moreover, SCN- concentrations in the smokers' and non-smokers' saliva were compared. In order to investigate the influence of various factors (sex, health status, taken medications) on the thiocyanate level in the saliva, more extensive studies on a group of 100 volunteers were carried out. Additionally, for a group of 18 volunteers, individual profiles of SCN- concentration in saliva measured on a daily basis for over a month were collected.
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Affiliation(s)
- Marcin Urbanowicz
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Kamila Sadowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Dorota G. Pijanowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Radosław Pomećko
- Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (R.P.); (M.B.)
| | - Maria Bocheńska
- Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (R.P.); (M.B.)
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12
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Dugheri S, Marrubini G, Speltini A, Mucci N, Cappelli G, Bartolucci G, Arcangeli G. Fully Automated Determination of Trimellitic Anhydride in Saturated Polyester Resins Using Programmed Temperature Vaporization-Large Volume Injection-Gas Chromatography Previous Aqueous Derivatization with Triethyloxonium Tetrafluoroborate. Chromatographia 2020. [DOI: 10.1007/s10337-020-03877-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Hussain A, Pu H, Sun DW. SERS detection of sodium thiocyanate and benzoic acid preservatives in liquid milk using cysteamine functionalized core-shelled nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:117994. [PMID: 31951941 DOI: 10.1016/j.saa.2019.117994] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 12/25/2019] [Accepted: 12/25/2019] [Indexed: 05/04/2023]
Abstract
A cysteamine functionalized core shelled nanoparticles (Au@Ag-CysNPs) was presented for simultaneous and rapid detection of sodium thiocyanate (STC) and benzoic acid (BA) preservatives in liquid milk using surface-enhanced Raman spectroscopy (SERS) technique. A spectrum covering 350-2350 cm-1 region was selected to detect STC with concentrations ranging from 0.5 to 10 mg/L and BA with concentrations ranging from 15 to 240 mg/L in milk samples. Characterization of nanoparticles using high-resolution TEM confirmed that the successful synthesis of Au@AgNPs with core (gold) size of 28 nm and shell (silver) thickness of about 5 nm was grafted with 120 μL of 0.1 nM cysteamine hydrochloride. Results showed that Au@Ag-CysNPs could be used to detect STC up to 0.03 mg/L with a limit of quantification (LOQ) of 0.039 mg/L and a coefficient of determination (R2) of 0.9833 in the milk sample. For detecting BA, it could be screened up to 9.8 mg/L with LOQ of 10.2 mg/L and R2 of 0.9903. The proposed substrate was also highly sensitive and the employed method involved only minor sample pretreatment steps. It is thus hoped that the new substrate could be used in the screening of prohibited chemicals in complex food matrices in future studies.
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Affiliation(s)
- Abid Hussain
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
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14
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Pagliano E. Versatile derivatization for GC-MS and LC-MS: alkylation with trialkyloxonium tetrafluoroborates for inorganic anions, chemical warfare agent degradation products, organic acids, and proteomic analysis. Anal Bioanal Chem 2020; 412:1963-1971. [PMID: 31915869 DOI: 10.1007/s00216-019-02299-8] [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: 10/08/2019] [Revised: 11/04/2019] [Accepted: 11/21/2019] [Indexed: 10/25/2022]
Abstract
Analytical chemists resort to derivatization for improving the detection performance of certain categories of analytes. Within this context, alkylation reactions are regarded as an important asset for many methods based on GC-MS and LC-MS. Trialkyloxonium tetrafluoroborates (R[Formula: see text][BF4]-) are powerful alkylating agents with ionic liquid properties: they are nonvolatile salts soluble in water which are easier and safer to handle with respect to common alkylating agents like diazomethane. R[Formula: see text][BF4]- can perform the alkylation in both organic and aqueous media at pH conditions ranging from acidic to alkaline. Recent analytical applications of trialkyloxonium derivatizations include the high-precision determination of inorganic anions in complex matrices, the qualitative confirmation of chemical warfare agent degradation products in soils, the profiling of carboxylic acids in urine, and the detection of protein post-translational modifications induced by carbon dioxide. The common denominator for all methods presented can be found in the simplicity of the alkylation protocol which, in most of the cases, requires a single step addition of the reagent directly to the sample. Graphical Abstract Alkylation with trialkyloxonium salts for GC-MS and LC-MS analysis.
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Affiliation(s)
- Enea Pagliano
- National Research Council Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada.
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15
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Er EÖ, Akkaya E, Özbek B, Bakırdere S. A powerful combination of quadruple isotope dilution strategy with dispersive magnetic solid phase extraction for the accurate and precise multi-analyte determination of tadalafil, sildenafil, avanafil and vardenafil in human plasma and urine samples using LC-ESI-Tandem MS. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Urbanowicz M, Pijanowska DG, Jasiński A, Ekman M, Bocheńska MK. A miniaturized solid-contact potentiometric multisensor platform for determination of ionic profiles in human saliva. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04429-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Abstract
This paper describes a miniaturized multisensor platform (MP-ISES) consisting of electrodes: a reference one (RE) and ion-selective electrodes (ISEs) for monitoring Na+, K+, Ca2+, Mg2+, Cl−, and SCN− ions and pH in human saliva. Gold electrode surface was modified by deposition of two layers: electrosynthesized PEDOT:PSS forming an intermediate layer, and ion-selective membrane. The developed ISEs were characterized by a wide linear range and sensitivity consistent with the Nernst model. The entire MP-ISEs are characterized by satisfactory metrological parameters demonstrating their applicability in biomedical research, in particular in measurements concerning determination of ionic profiles of saliva. Saliva samples of 18 volunteers aged from 20 to 26 participating in a month experiment had been daily collected and investigated using the MP-ISEs assigned individually to each person. Personalized profiles of ions (ionograms) in saliva, such as Na+, K+, Ca2+, Mg2+, Cl−, SCN−, and H+, were obtained.
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Dosedělová V, Ďurč P, Dolina J, Konečný Š, Foret F, Kubáň P. Analysis of bicarbonate, phosphate and other anions in saliva by capillary electrophoresis with capacitively coupled contactless conductivity detection in diagnostics of gastroesophageal reflux disease. Electrophoresis 2019; 41:116-122. [PMID: 31680268 DOI: 10.1002/elps.201900319] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/10/2019] [Accepted: 10/31/2019] [Indexed: 01/10/2023]
Abstract
Bicarbonate and phosphate constitute major salivary buffering components, and their importance consists in the neutralization of acidic gastric contents during reflux episodes. In this work, capillary electrophoresis with capacitively coupled contactless conductivity detector was applied for the analysis of bicarbonate, phosphate, and another inorganic (chloride, nitrite, nitrate, sulfate, thiocyanate) and organic anions (acetate, butyrate) to evaluate their levels in saliva. The background electrolytes of different composition and pH between 6.02-9.41 were assessed for the bicarbonate and phosphate determination by comparison of the real analyses of a model solution with the simulation by PeakMaster software. The optimized background electrolyte was composed of 10 mM 2-(N-morpholino)ethanesulfonic acid, 20 mM arginine, and 30 µM cetyltrimethylammonium bromide, pH 8.95. Using this BGE, the anion levels were compared in saliva from 20 patients suffering from gastroesophageal reflux disease (GERD) and saliva from 12 healthy subjects. Bicarbonate levels were significantly elevated in saliva from GERD patients suggesting the possible applicability of bicarbonate as a biomarker in non-invasive diagnostics of GERD by CE-C4 D.
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Affiliation(s)
- Věra Dosedělová
- Department of Bioanalytical Instrumentation, CEITEC Masaryk University, Brno, Czech Republic
| | - Pavol Ďurč
- Department of Bioanalytical Instrumentation, CEITEC Masaryk University, Brno, Czech Republic.,Department of Chemistry, Masaryk University, Brno, Czech Republic
| | - Jiří Dolina
- Department of Internal Gastroenterology, Faculty Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Štefan Konečný
- Department of Internal Gastroenterology, Faculty Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - František Foret
- Department of Bioanalytical Instrumentation, CEITEC Masaryk University, Brno, Czech Republic
| | - Petr Kubáň
- Department of Bioanalytical Instrumentation, CEITEC Masaryk University, Brno, Czech Republic
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18
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Seetasang S, Kaneta T. Development of a miniaturized photometer with paired emitter-detector light-emitting diodes for investigating thiocyanate levels in the saliva of smokers and non-smokers. Talanta 2019; 204:586-591. [PMID: 31357338 DOI: 10.1016/j.talanta.2019.06.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/05/2019] [Accepted: 06/07/2019] [Indexed: 12/19/2022]
Abstract
A simple, small and inexpensive photometer that uses a pair of light-emitting diodes (LEDs) and a simple operational amplifier was developed for investigating thiocyanate levels in saliva obtained from smokers and non-smokers. The photometer is based on paired emitter-detector diodes (PEDDs), and the entire system can be purchased for less than a hundred US dollars. The PEDD-based photometer can measure the transmittance of a solution in a 1-cm disposable polystyrene cuvette using only rechargeable dry-cell batteries, which makes it suitable for analysis outside of equipped laboratories. The metal complex formation between Fe (III) and thiocyanate ions in an acidic condition permits colorimetric detection of thiocyanate ions using LEDs emitting at 465 nm, because the complex shows maximum absorption at 457 nm. The developed photometer exhibits excellent performance with linearity ranging from 0.05 mmol L-1 to 0.75 mmol L-1 and a correlation coefficient (r2) > 0.999. The limits of detection and quantification were 0.01 mmol L-1 and 0.05 mmol L-1, respectively. Both intra- and inter-day precision were obtained with relative standard deviations (RSD) of less than 1% in the determination of thiocyanate. The proposed method is simple, facile, and sensitive enough to investigate the levels of thiocyanate in the saliva samples of smokers and non-smokers with centrifugation being the only special treatment for samples. The results showed that the concentrations of thiocyanate were approximately 5-fold higher in smokers than in non-smokers.
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Affiliation(s)
- Sasikarn Seetasang
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Takashi Kaneta
- Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.
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Pagliano E, LeBlanc KL, Mester Z. Selective Gas Chromatography Mass Spectrometry Method for Ultratrace Detection of Selenocyanate. Anal Chem 2019; 91:12162-12166. [PMID: 31464419 DOI: 10.1021/acs.analchem.9b02615] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The recent interest in the determination of selenocyanate (SeCN-) in wastewater systems has spurred the development of analytical methods for its determination at the ultratrace level. Since most of the current procedures require complex and costly instrumental configurations, we have developed a simple and rapid gas chromatography tandem mass spectrometry (GC/MS/MS) method able to detect SeCN- in water samples with a LOD of 0.1 ng/g Se. A 1 mL volume of aqueous sample was buffered with sodium bicarbonate and treated with triethyloxonium tetrafluoroborate for conversion of the analyte into volatile EtSeCN. The derivatization yield was higher than 90%, and it could tolerate concentrations of chloride or sulfate up to 2%. The EtSeCN was extracted in chloroform and could be detected in electron ionization and also in negative chemical ionization mode with a further gain in signal-to-noise ratio by a factor of 2. The method was applied for the analysis of natural waters with quantitation of SeCN- in the low ng/g region. The Se13C15N- internal standard could be used for isotope dilution. Quantitative spike recoveries of 1 ng/g Se were obtained from seawater and river water, and 1 ng/g Se could be quantified within a standard uncertainty of 15%.
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Affiliation(s)
- Enea Pagliano
- National Research Council Canada , 1200 Montreal Road , Ottawa , Ontario K1A 0R6 , Canada
| | - Kelly L LeBlanc
- National Research Council Canada , 1200 Montreal Road , Ottawa , Ontario K1A 0R6 , Canada
| | - Zoltán Mester
- National Research Council Canada , 1200 Montreal Road , Ottawa , Ontario K1A 0R6 , Canada
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Chandler JD, Horati H, Walker DI, Pagliano E, Tirouvanziam R, Veltman M, Scholte BJ, Janssens HM, Go YM, Jones DP. Determination of thiocyanate in exhaled breath condensate. Free Radic Biol Med 2018; 126:334-340. [PMID: 30144632 PMCID: PMC6166650 DOI: 10.1016/j.freeradbiomed.2018.08.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/09/2018] [Accepted: 08/11/2018] [Indexed: 01/09/2023]
Abstract
Thiocyanate is a heme peroxidase substrate that scavenges oxidants produced during inflammation and regulates host defense. In cystic fibrosis (CF) patients, increased airway thiocyanate levels are associated with improved lung function. Research on airway thiocyanate is limited, however, because convenient non-invasive airway sampling methods, such as exhaled breath condensate (EBC), yield low concentrations that are difficult to detect with available assays. In the present study, we developed a method for the determination of thiocyanate in dilute samples using isotope dilution headspace gas chromatography-coupled high-resolution, accurate-mass mass spectrometry (GC-HRMS). The method reliably quantified as little as 4 pmol thiocyanate in EBC and could detect even lower amounts. We successfully measured thiocyanate in EBC from seven healthy donors, with a mean ± SD of 27 ± 16 nM and a median inter-assay coefficient of variation of 10.4% over six months. The method was applied to other biological fluids (plasma from the same visit as EBC donation; bronchoalveolar lavage fluid [BALF] from infants with CF; and healthy adult mouse BALF), giving reliable quantification of samples ranging from 10 nM to 100 µM. Thiocyanate concentrations in fluids besides EBC were (from lowest to highest): 0.73 ± 0.39 µM in BALF of healthy adult mice (n = 6); 1.4 ± 1.4 µM in BALF from infants with CF (n = 24); 46 ± 22 µM in the plasma of adult volunteers (n = 7). These results demonstrate the utility of this new method for clinical determination of thiocyanate in EBC and other biological fluids.
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Affiliation(s)
- Joshua D Chandler
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Hamed Horati
- Department of Pediatric Pulmonology, Erasmus MC, Rotterdam, the Netherlands; Department of Cell Biology, Erasmus MC, Rotterdam, the Netherlands
| | - Douglas I Walker
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Enea Pagliano
- Measurement Science and Standards, National Research Council of Canada, Ottawa, Canada
| | - Rabindra Tirouvanziam
- Division of Pulmonary, Allergy & Immunology, Cystic Fibrosis and Sleep, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Mieke Veltman
- Department of Pediatric Pulmonology, Erasmus MC, Rotterdam, the Netherlands; Department of Cell Biology, Erasmus MC, Rotterdam, the Netherlands
| | - Bob J Scholte
- Department of Pediatric Pulmonology, Erasmus MC, Rotterdam, the Netherlands; Department of Cell Biology, Erasmus MC, Rotterdam, the Netherlands
| | - Hettie M Janssens
- Department of Pediatric Pulmonology, Erasmus MC, Rotterdam, the Netherlands
| | - Young-Mi Go
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Dean P Jones
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.
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Pagliano E, Campanella B, D'Ulivo A, Mester Z. Derivatization chemistries for the determination of inorganic anions and structurally related compounds by gas chromatography - A review. Anal Chim Acta 2018; 1025:12-40. [DOI: 10.1016/j.aca.2018.03.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/12/2022]
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22
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Gavrilenko NA, Saranchina NV, Sukhanov AV, Fedan DA, Gavrilenko MA. Kinetic Determination of Thiocyanate by the Reaction of Bromate with Crystal Violet Immobilized in a Polymethacrylate Matrix. JOURNAL OF ANALYTICAL CHEMISTRY 2018. [DOI: 10.1134/s1061934818090034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Nguelo BB, Dedzo GK, Tonle IK, Detellier C, Ngameni E. Sensitive Amperometric Determination of Thiocyanates at Ionic Liquid Nanohybrid Kaolinite Modified Glassy Carbon Electrode. ELECTROANAL 2018. [DOI: 10.1002/elan.201700821] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bruno Boniface Nguelo
- Laboratoire de Chimie Analytique, Faculté des Sciences; Université de Yaoundé 1; B.P. 812 Yaoundé Cameroun
| | - Gustave Kenne Dedzo
- Laboratoire de Chimie Analytique, Faculté des Sciences; Université de Yaoundé 1; B.P. 812 Yaoundé Cameroun
- Department of Chemistry and Biomolecular Sciences, and Centre for Catalysis Research and Innovation; University of Ottawa; Ontario K1N 6N5 Canada
| | - Ignas Kenfack Tonle
- Laboratoire de Chimie Analytique, Faculté des Sciences; Université de Yaoundé 1; B.P. 812 Yaoundé Cameroun
- Electrochemistry and Chemistry of Materials, Department of Chemistry, Faculty of Science; University of Dschang; P.O. Box 67 Dschang Cameroon
| | - Christian Detellier
- Department of Chemistry and Biomolecular Sciences, and Centre for Catalysis Research and Innovation; University of Ottawa; Ontario K1N 6N5 Canada
| | - Emmanuel Ngameni
- Laboratoire de Chimie Analytique, Faculté des Sciences; Université de Yaoundé 1; B.P. 812 Yaoundé Cameroun
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Peng CF, Pan N, Zhi-Juan Q, Wei XL, Shao G. Colorimetric detection of thiocyanate based on inhibiting the catalytic activity of cystine-capped core-shell Au@Pt nanocatalysts. Talanta 2017; 175:114-120. [DOI: 10.1016/j.talanta.2017.06.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/20/2017] [Accepted: 06/02/2017] [Indexed: 11/24/2022]
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25
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Narkowicz S, Jaszczak E, Polkowska Ż, Kiełbratowska B, Kotłowska A, Namieśnik J. Determination of thiocyanate as a biomarker of tobacco smoke constituents in selected biological materials of human origin. Biomed Chromatogr 2017; 32. [PMID: 29027680 DOI: 10.1002/bmc.4111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 09/29/2017] [Accepted: 09/29/2017] [Indexed: 11/06/2022]
Abstract
In order to protect human health, it is necessary to biomonitor toxic substances originating from tobacco smoke in biological materials sampled from persons with different exposures to tobacco smoke constituents. Thiocyanate anion is a biomarker of exposure to tobacco smoke components which is characterized by a relatively long half-life in the human body, i.e. 6 days. In this work, we present the results of thiocyanate determinations performed on samples of placenta, meconium, saliva, breast milk, sweat and blood. The placenta samples were subjected to accelerated solvent extraction with water. The thiocyanate concentrations were determined using ion chromatography. The analyzed biological materials were compared with regard to their applicability for biomonitoring toxic substances originating from tobacco smoke. The highest mean concentrations of thiocyanate were observed in the samples of biological materials collected from active smokers.
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Affiliation(s)
- Sylwia Narkowicz
- Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology, Gdańsk, Poland
| | - Ewa Jaszczak
- Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology, Gdańsk, Poland
| | - Żaneta Polkowska
- Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology, Gdańsk, Poland
| | | | - Alicja Kotłowska
- Department of Bromatology, Faculty of Pharmacy with Subfaculty of Laboratory Medicine, Medical University of Gdańsk, Gdańsk, Poland
| | - Jacek Namieśnik
- Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology, Gdańsk, Poland
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Study on the potential application of salivary inorganic anions in clinical diagnosis by capillary electrophoresis coupled with contactless conductivity detection. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1014:70-4. [DOI: 10.1016/j.jchromb.2016.01.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 01/30/2016] [Accepted: 01/31/2016] [Indexed: 11/21/2022]
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27
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Pena-Pereira F, Lavilla I, Bendicho C. Paper-based analytical device for instrumental-free detection of thiocyanate in saliva as a biomarker of tobacco smoke exposure. Talanta 2016; 147:390-6. [PMID: 26592623 DOI: 10.1016/j.talanta.2015.10.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/02/2015] [Accepted: 10/05/2015] [Indexed: 01/22/2023]
Abstract
This work describes a fast and simple assay for in situ detection of thiocyanate, i.e., a biomarker of tobacco smoke exposure, in human saliva. The assay is based on the formation of an iron(III)-thiocyanate colored complex in a paper-based sensing platform and subsequent image analysis using a scanner as detection device. Experimental parameters influencing the color intensity of the complex were fully evaluated, including the selection of detection conditions, type of paper substrate, test zone dimensions and composition as well as the stability of the paper-based device. Under optimal conditions, the detection limit was 0.06mM of thiocyanate, and the repeatability, expressed as relative standard deviation, was 3%. The proposed method, characterized by its simplicity, portability and low sample consumption, was applied to the detection of thiocyanate in a series of human saliva samples. Average thiocyanate levels in the ranges 0.28-0.87mM and 0.78-4.28mM were found for non-smokers and smokers, respectively. Recovery studies were carried out at two concentration levels, showing recovery values in the range of 96.1-103.6%.
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Affiliation(s)
- Francisco Pena-Pereira
- Analytical and Food Chemistry Department, Faculty of Chemistry, University of Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - Isela Lavilla
- Analytical and Food Chemistry Department, Faculty of Chemistry, University of Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - Carlos Bendicho
- Analytical and Food Chemistry Department, Faculty of Chemistry, University of Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain.
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Lu Q, Liu Y, Hou Y, Wang H, Zhang Y, Yao S. Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant. Analyst 2015; 140:7645-9. [DOI: 10.1039/c5an01605c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have found that hydroxyl-rich carbon dots (C-dots) have the ability to reduce Au3+to form gold nanoparticles (AuNPs) which can be used as an optical sensor to detect SCN−in raw milk with satisfactory results.
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Affiliation(s)
- Qiujun Lu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Yalan Liu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Yuxin Hou
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Haiyan Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Youyu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
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