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Potărniche IA, Saroși C, Terebeș RM, Szolga L, Gălătuș R. Classification of Food Additives Using UV Spectroscopy and One-Dimensional Convolutional Neural Network. SENSORS (BASEL, SWITZERLAND) 2023; 23:7517. [PMID: 37687972 PMCID: PMC10490620 DOI: 10.3390/s23177517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/20/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023]
Abstract
Food additives are utilized in countless food products available for sale. They enhance or obtain a specific flavor, extend the storage time, or obtain a desired texture. This paper presents an automatic classification system for five food additives based on their absorbance in the ultraviolet domain. Solutions with different concentrations were created by dissolving a measured additive mass into distilled water. The analyzed samples were either simple (one additive solution) or mixed (two additive solutions). The substances presented absorbance peaks between 190 nm and 360 nm. Each substance presents a certain number of absorbance peaks at specific wavelengths (e.g., acesulfame potassium presents an absorbance peak at 226 nm, whereas the peak associated with potassium sorbate is at 254 nm). Therefore, each additive has a distinctive spectrum that can be used for classification. The sample classification was performed using deep learning techniques. The samples were associated with numerical labels and divided into three datasets (training, validation, and testing). The best classification results were obtained using CNN (convolutional neural network) models. The classification of the 404 spectra with a CNN model with three convolutional layers obtained a mean testing accuracy of 92.38% ± 1.48%, whereas the mean validation accuracy was 93.43% ± 2.01%.
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Affiliation(s)
- Ioana-Adriana Potărniche
- Basis of Electronics Department, Faculty of Electronics, Telecommunication and Information Technology, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania; (L.S.); (R.G.)
| | - Codruța Saroși
- Department of Polymer Composites, Institute of Chemistry “Raluca Ripan”, Babes-Bolyai University, 400294 Cluj-Napoca, Romania;
| | - Romulus Mircea Terebeș
- Communications Department, Faculty of Electronics, Telecommunication and Information Technology, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania;
| | - Lorant Szolga
- Basis of Electronics Department, Faculty of Electronics, Telecommunication and Information Technology, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania; (L.S.); (R.G.)
| | - Ramona Gălătuș
- Basis of Electronics Department, Faculty of Electronics, Telecommunication and Information Technology, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania; (L.S.); (R.G.)
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2
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Zhu K, Chen Y, Yu L, Hou C, Qiao X, Wang T. Determination of neotame in various foods by high-performance liquid chromatography coupled with ultraviolet and mass spectrometric detection. Food Chem 2023; 416:135863. [PMID: 36898340 DOI: 10.1016/j.foodchem.2023.135863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/06/2023]
Abstract
A new analytical technique involving protein precipitation, heating, lipid degreasing, and SPE procedures combined with HPLC-UV and HPLC-MS/MS has been developed for the determination of neotame in a variety of food samples. This method is applicable for high-protein, high-lipid, or gum-based solid samples. The limit of detection of the HPLC-UV method was 0.5 μg/mL, while that of the HPLC-MS/MS method was 3.3 ng/mL. The spiked recoveries of neotame in 73 kinds of foods were in the range of 81.1-107.2 % with UV detection. The spiked recoveries obtained by HPLC-MS/MS in 14 kinds of foods ranged from 81.6 % to 105.8 %. This technique was successfully used to determine the contents of neotame in two positive samples, indicating its applicability in food analysis.
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Affiliation(s)
- Kenan Zhu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China
| | - Yihui Chen
- Ningbo Customs Technology Center, Ningbo 315040, PR China.
| | - Lanlan Yu
- Ningbo Customs Technology Center, Ningbo 315040, PR China
| | - Chunyan Hou
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA.
| | - Xiaoqiang Qiao
- College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Tingting Wang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China; Zhejiang Institute of Tianjin University, Ningbo 315201, PR China.
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3
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Ivanova B, Spiteller M. Stochastic dynamic ultraviolet photofragmentation and high collision energy dissociation mass spectrometric kinetics of triadimenol and sucralose. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:32348-32370. [PMID: 36462070 DOI: 10.1007/s11356-022-24259-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 11/13/2022] [Indexed: 06/17/2023]
Abstract
The major goal of the paper is to provide empirical proof of view that innovative stochastic dynamic mass spectrometric equation D″SD = 2.6388·10-17·(< I2 > - < I > 2) determines the exact analyte concentration in solution via quantifying experimental variable intensity (I) of an analyte ion per any short span of scan time of any measurement, which also appears applicable to quantify laser-induced ultraviolet photofragmentation and high energy collision dissociation mass spectrometric processes. Triadimenol (1) and sucralose (2) using positive and negative polarity are examined. Laser irradiation energy λex = 213 nm is utilized. The issue is of central importance for monitoring organic micro-pollutants in surface, ground, and drinking water as well as tasks of risk assessment for environment and human health from contamination with organics. Despite the significant importance of the topic, answering the question of functional kinetic relations of such processes is by no means straightforward, so far, due to a lack of in-depth knowledge of mechanistic aspects of fragment paths of analytes in environment and foods as well as kinetics of processes under ultraviolet laser irradiation. Although there is truth in the classical theory of first-order reaction kinetics, it does not describe all kinetic data on analytes (1) and (2). A new damped sine wave functional response to a large amount of kinetics is presented. High-resolution mass spectrometric data and chemometrics are used. The study provides empirical evidence for claim that temporal behavior of mass spectrometric variable intensity under negative polarity obeys a certain scientific law written by means of equation above. It is the same for positive and negative soft-ionization mass spectrometric conditions.
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Affiliation(s)
- Bojidarka Ivanova
- Lehrstuhl Für Analytische Chemie, Institut Für Umweltforschung, Fakultät Für Chemie Und Chemische Biologie, Universität Dortmund, Otto-Hahn-Straße 6, 44221, Dortmund, Nordrhein-Westfalen, Germany.
| | - Michael Spiteller
- Lehrstuhl Für Analytische Chemie, Institut Für Umweltforschung, Fakultät Für Chemie Und Chemische Biologie, Universität Dortmund, Otto-Hahn-Straße 6, 44221, Dortmund, Nordrhein-Westfalen, Germany
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4
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Elucidation of Natural Components of Gardenia thunbergia Thunb. Leaves: Effect of Methanol Extract and Rutin on Non-Alcoholic Fatty Liver Disease. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020879. [PMID: 36677937 PMCID: PMC9866290 DOI: 10.3390/molecules28020879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/06/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
The rising prevalence of non-alcoholic fatty liver disease NAFLD has strained the healthcare system. Natural products could solve this problem, so the current study focused on the impact of G. thunbergia Thunb. against this ailment. LC-ESI-MS/MS revealed the phytochemical profile of the methanol extract from Gardenia thunbergia leaves (GME). Forty-eight compounds were tentatively identified, and stigmasterol, fucosterol, ursolic acid, and rutin were isolated. The separation of the last three compounds from this plant had not before been achieved. The anti-NAFLD effect of the methanol extract of the leaves of G. thunbergia, and its major metabolite, rutin, was assessed in mice against high-fructose diet (HFD)-induced obesity. Male mice were allocated into nine groups: (1) saline (control), (2) 30% fructose (diseased group), (3) HFD, and 10 mg/kg of simvastatin. Groups 4-6 were administered HFD and rutin 50, 75, and 100 mg/kg. Groups (7-9) were administered HFD and methanol extract of leaves 100, 200, and 300 mg/kg. Methanol extract of G. thunbergia leaves at 200 mg/kg, and rutin at 75 mg/kg significantly reduced HFD-induced increments in mice weight and hepatic damage indicators (AST and ALT), steatosis, and hypertrophy. The levels of total cholesterol, LDL-C, and triglycerides in the blood decreased. In addition, the expressions of CYP2E1, JNK1, and iNOS in the diseased mice were downregulated. This study found that GME and rutin could ameliorate NAFLD in HFD-fed mice, with results comparable to simvastatin, validating G. thunbergia's hepatoprotective effects.
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da Silva Santana N, Mothé CG, Nele de Souza M, Mothé MG. Thermal and rheological study of artificial and natural powder tabletop sweeteners. Food Res Int 2022; 162:112039. [DOI: 10.1016/j.foodres.2022.112039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 09/16/2022] [Accepted: 10/10/2022] [Indexed: 11/04/2022]
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Morlock GE, Sabir G. Reagent sequence for planar chromatographic analysis of eight sweeteners in food products approved in the European Union. JPC-J PLANAR CHROMAT 2022. [DOI: 10.1007/s00764-022-00178-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractSweeteners, which are regulated as food additives in the European Union, are used as tabletop sweeteners or added to foods for sweetening with the aim of reducing the calorie content. For their simple analysis, a quantitative high-performance thin-layer chromatography multi-imaging (HPTLC−UV/Vis/FLD) method was developed, which used a reagent sequence to detect eight important sweeteners in eight different food products. The samples were dissolved or diluted and separated on HPTLC plates silica gel 60 F254 with a mixture of ethyl acetate, methanol, and acetic acid 5:1:1, V/V. Due to the different structures and detectabilities of the sweeteners, different post-chromatographic derivatization reagents were compared for multi-detection of the sweeteners on the same plate. First, the UV absorbance was detected, and then the derivatization reagent sequence was performed with the primuline reagent, then ninhydrin glacial acetic acid reagent, and finally 2-naphthol sulfuric acid reagent. It was important to arrange and use the reagents according to their increasing acidity. Zones of interest can be confirmed by mass spectrometry. Compared to the status quo analysis of sweeteners, the whole method is simple, robust, and rapid considering the minimalist sample preparation and reagent sequence applied on the same plate. In addition, the influence of food sample matrix on the results is easily understood due to the image-giving nature and multi-detection.
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Greibe E, Leth‐Møller M, Stampe S, Ovesen P, Pedersen M, Hoffmann‐Lücke E. Development and validation of an LC‐MS/MS method for quantification of artificial sweeteners in human matrixes. Biomed Chromatogr 2022; 36:e5350. [PMID: 35092038 PMCID: PMC9285464 DOI: 10.1002/bmc.5350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 11/09/2022]
Abstract
Artificial sweeteners are widely used as substitutes for sugar. The sweeteners are generally considered safe, however their whereabouts during pregnancy and lactation and the effect on child development are poorly explored. There is a need for new tools to measure these substances during pregnancy and lactation. Here, we describe the development and validation of a sensitive liquid chromatography–tandem mass spectrometry method for the simultaneous quantification of acesulfame, cyclamate, saccharin and sucralose in human plasma, umbilical cord blood, amniotic fluid and breast milk. The samples were prepared by protein precipitation and separated on a Luna Omega Polar C18 column (2.1 × 50 mm, 1.6 μm). Electrospray ionization in negative mode and multiple reaction monitoring were used to monitor the ion transitions. The validated concentration ranges were from 1 to 500 ng/ml (10–500 ng/ml for sucralose). Interassay precisions were all ≤15% and the accuracies were within ±15%. Stability, linearity, dilution integrity, carryover and recovery were also examined and satisfied the validation criteria. Finally, this analytical method was successfully applied on spiked samples of plasma, umbilical cord blood, amniotic fluid and breast milk, proving its suitability for use in clinical studies on artificial sweeteners, including during pregnancy and lactation.
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Affiliation(s)
- Eva Greibe
- Department of Clinical Biochemistry Aarhus University Hospital, and Institute for Clinical Medicine, Health, Aarhus University Denmark
| | - Magnus Leth‐Møller
- Comparative Medicine Lab Aarhus University Denmark
- Department of Gynecology and Obstetrics Aarhus University Hospital, Steno Diabetes Centre Aarhus, and Institute for Clinical Medicine, Health, Aarhus University Denmark
| | - Sofie Stampe
- Comparative Medicine Lab Aarhus University Denmark
- Department of Gynecology and Obstetrics Aarhus University Hospital, Steno Diabetes Centre Aarhus, and Institute for Clinical Medicine, Health, Aarhus University Denmark
| | - Per Ovesen
- Department of Gynecology and Obstetrics Aarhus University Hospital, Steno Diabetes Centre Aarhus, and Institute for Clinical Medicine, Health, Aarhus University Denmark
| | | | - Elke Hoffmann‐Lücke
- Department of Clinical Biochemistry Aarhus University Hospital, and Institute for Clinical Medicine, Health, Aarhus University Denmark
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Sezgin B, Arli G, Can NÖ. Simultaneous HPLC-DAD determination of seven intense sweeteners in foodstuffs and pharmaceuticals using a core-shell particle column. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2020.103768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Li X, Li S, Li H, Wang J, Luo Q, Yin X. Quantification of artificial sweeteners in alcoholic drinks using direct analysis in real-time QTRAP mass spectrometry. Food Chem 2020; 342:128331. [PMID: 33097326 DOI: 10.1016/j.foodchem.2020.128331] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/04/2020] [Accepted: 10/05/2020] [Indexed: 01/01/2023]
Abstract
Artificial sweeteners have been widely used as replacements for sugars in foods. Rapid determination of artificial sweeteners contained in various foods are highly desirable for the routine analysis. Here, we report a robust approach based on direct analysis in real time coupled with QTRAP mass spectrometry to screen and quantitate simultaneously seven artificial sweeteners, including aspartame, saccharin, acesulfame-K, neotame, sucralose, cyclamate and alitame in alcoholic drinks. The detection method merely involved a simple sample pretreatment process, with a good linearity, low limit of quantification, satisfied recovery and relative standard deviation for each target compound. More importantly, the approach is highly sensitive and accurate in monitoring the seven artificial sweeteners in whisky, Chinese liquors, beer and wines obtained from the supermarket. The results demonstrated that the approach described here could be suitable for large-scale application in routine quality control analysis of artificial sweeteners.
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Affiliation(s)
- Xiaomin Li
- Laboratory of Food Safety, Division of Metrology in Chemistry, National Institute of Metrology China, Beijing 100029, PR China
| | - Shuangqing Li
- Laboratory of Food Safety, Division of Metrology in Chemistry, National Institute of Metrology China, Beijing 100029, PR China
| | - Hongmei Li
- Laboratory of Food Safety, Division of Metrology in Chemistry, National Institute of Metrology China, Beijing 100029, PR China.
| | - Jing Wang
- Laboratory of Food Safety, Division of Metrology in Chemistry, National Institute of Metrology China, Beijing 100029, PR China
| | - Qin Luo
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Xiong Yin
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, PR China.
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10
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Herniman JM, Langley GJ. Development of ultrahigh-performance liquid chromatography/mass spectrometry and ultrahigh-performance supercritical fluid chromatography/mass spectrometry assays to determine the concentration of Bitrex™ and sodium saccharin in homemade facemask fit testing solutions. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8848. [PMID: 32492215 PMCID: PMC7300544 DOI: 10.1002/rcm.8848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/01/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
UNLABELLED Fast and easily transferable chromatography/mass spectrometry assays were required to detect and quantify the amount of Bitrex™ and sodium saccharin in homemade facemask fit testing solutions. METHODS Bitrex™ solutions were analysed using reversed-phase ultrahigh-performance liquid chromatography coupled with positive ion electrospray ionisation mass spectrometry (UHPLC/ESI-MS). Separation was achieved using a mobile phase gradient with an Acquity BEH C18-packed column. Sodium saccharin solutions were analysed using ultrahigh-performance supercritical fluid chromatography coupled with negative ion electrospray ionisation (UHPSFC/ESI-MS). Separation was achieved using isocratic elution with an Acquity UPC2 Torus Diol packed column and a methanol (25 mM ammonium acetate) co-solvent. RESULTS The calibration curves obtained using the ratio of the active compound to an internal standard generated linear regression values (R2 ) >0.99. Samples analysed prior to and after an autoclave sterilisation process and bottling gave repeatable measurements within 10% of the expected concentration. CONCLUSIONS The two assays afford a fast robust and quantitative analytical method for the detection of the active components used to test the efficacy of the homemade facemask testing solutions.
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Affiliation(s)
- Julie M. Herniman
- School of Chemistry, Faculty of Engineering and Physical SciencesUniversity of Southampton, HighfieldSouthamptonSO17 1BJUK
| | - G. John Langley
- School of Chemistry, Faculty of Engineering and Physical SciencesUniversity of Southampton, HighfieldSouthamptonSO17 1BJUK
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Cárdenas-Soracá DM, Singh V, Nazdrajić E, Vasiljević T, Grandy JJ, Pawliszyn J. Development of thin-film solid-phase microextraction coating and method for determination of artificial sweeteners in surface waters. Talanta 2020; 211:120714. [DOI: 10.1016/j.talanta.2020.120714] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/01/2020] [Accepted: 01/02/2020] [Indexed: 01/10/2023]
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Ma K, Li X, Zhang Y, Liu F. Determining High-Intensity Sweeteners in White Spirits Using an Ultrahigh Performance Liquid Chromatograph with a Photo-Diode Array Detector and Charged Aerosol Detector. Molecules 2019; 25:molecules25010040. [PMID: 31861939 PMCID: PMC6983009 DOI: 10.3390/molecules25010040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/13/2019] [Accepted: 12/14/2019] [Indexed: 12/03/2022] Open
Abstract
In China, white spirit is not only an alcoholic drink but also a cultural symbol. A novel and accurate method for simultaneously determining nine sweeteners (most authorized for use in China) in white spirits by ultrahigh performance liquid chromatography (UHPLC) with a photo-diode array detector (PDA) and charged aerosol detector (CAD) was developed. The sweeteners were acesulfame, alitame, aspartame, dulcin, neotame, neohesperidine dihydrochalcone, saccharin, sodium cyclamate, and sucralose. The sweeteners were separated within 16 min using a BEH C18 column and linear gradient-elution program. The optimized method allowed low concentrations (micrograms per gram) of sweeteners to be simultaneously detected. The CAD gave good linearities (correlation coefficients > 0.9936) for all analytes at concentrations of 0.5 to 50.0 μg/g. The limits of detection were 0.16 to 0.77 μg/g. Acesulfame, dulcin, neohesperidine dihydrochalcone, and saccharin were determined using the PDA detector, which gave correlation coefficients > 0.9994 and limits of detection of 0.16 to 0.22 μg/g. The recoveries were 95.1% to 104.9% and the relative standard deviations were 1.6% to 3.8%. The UHPLC-PDA-CAD method is more convenient and cheaper than LC-MS/MS methods. The method was successfully used in a major project called “Special Action against Counterfeit and Shoddy white spirits” and to monitor risks posed by white spirits in China.
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Affiliation(s)
- Kang Ma
- Division of Chemical Metrology and Analytical Science, National Institute for Metrology of China, Beijing 100013, China
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
- Correspondence: (K.M.); (F.L.); Tel.: +86-010-64524783 (K.M.); +86-010-82321027 (F.L.); Fax: +86-010-6452478 (K.M.); +86-010-82321081 (F.L.)
| | - Xiaojia Li
- College of Chemistry and Bioengineering, University of Science and Technology Beijing, Beijing 100083, China;
| | - Yiwen Zhang
- Beijing Institute of Metrology, Beijing 100021, China;
| | - Fei Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
- Correspondence: (K.M.); (F.L.); Tel.: +86-010-64524783 (K.M.); +86-010-82321027 (F.L.); Fax: +86-010-6452478 (K.M.); +86-010-82321081 (F.L.)
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Lin CS, Yang CJ, Chen PJ, Liu KW, Lin HP, Lin CC, Lee YC, Cheng WC, Wei CI, Tsai YH. Assessment of Microbiological and Chemical Quality of Bubble Tea Beverages Vended in Taiwan. J Food Prot 2019; 82:1384-1389. [PMID: 31335185 DOI: 10.4315/0362-028x.jfp-18-517] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bubble tea beverages (n = 105) purchased from vendors in Taiwan were tested to determine their microbiological and chemical quality. Nearly half of the tested samples (48.6%, 51 of 105) had aerobic plate counts (APCs) higher than the Taiwan Food and Drug Administration guideline of 4.0 log CFU/mL, and 55 (52.4%) had coliform counts (most probable number [MPN]) higher than the 10 MPN/mL guideline. Escherichia coli, Salmonella, Staphylococcus aureus, sweeteners, preservatives, maleic acid, and coumarin were not detected in any sample. However, catechins were not detected to 188 mg/mL, and caffeine was 10.1 to 457.6 mg/mL. Bubble tea samples obtained from vendors in southern Taiwan had a mean APC of 2.6 log CFU/mL and a mean coliform count of 61.7 MPN/mL; these values were significantly lower (P < 0.05) than those from samples collected from vendors in northern, eastern, or central Taiwan. Samples obtained from southern Taiwan had the highest mean catechin concentrations of 21.3 mg/mL (P < 0.05). About 60% (63 of 105) of the bubble tea samples were not labeled with the origin of the tea leaves, which is in violation of Taiwanese food labeling regulations. In general, the bubble tea beverages tested had satisfactory microbial and chemical qualities.
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Affiliation(s)
| | | | | | | | | | - Chih-Cheng Lin
- 1 Department of Food Science.,2 Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsin-Chu, 300 Taiwan, Republic of China
| | - Yi-Chen Lee
- 3 Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung, 811 Taiwan, Republic of China
| | - Wei-Chih Cheng
- 4 Food and Drug Administration, Ministry of Health and Welfare Taipei, 115 Taiwan, Republic of China
| | - Cheng-I Wei
- 5 International Programs in Agriculture and Natural Resources, College of Agriculture and Natural Resources, University of Maryland, College Park, Maryland 20904, USA
| | - Yung-Hsiang Tsai
- 3 Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung, 811 Taiwan, Republic of China
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Simultaneous extraction and analysis of preservatives and artificial sweeteners in juices by salting out liquid-liquid extraction method prior to ultra-high performance liquid chromatography. Food Chem 2018; 277:586-594. [PMID: 30502189 DOI: 10.1016/j.foodchem.2018.10.107] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/16/2018] [Accepted: 10/22/2018] [Indexed: 11/21/2022]
Abstract
A novel and fast salting out liquid-liquid extraction method was developed for simultaneous determination of food additives with different polarities in juices. Chromatographic separation was achieved in less than 6 min using Acquity UPLC BEH C 18 (100 mm × 2.1 mm d.i. × 1.7 µm) column with ammonium acetate with 0.01% of trifluoroacetic acid as eluent A and acetonitrile as eluent B at a flow rate of 0.2 mL min-1. The main factors affecting the extraction efficiency were optimized. The method was validated applying accuracy profile based on total error. The extraction recoveries ranged from 84.97 to 122%. Relative standard deviation ranged from 1.24 to 7.99% for intraday assay and from 1.69 to 9.16% for intermediate precision. The limits of detection for five food additives were from 0.3 to 1.42 µg mL-1. The method was successfully applied to 47 samples of juices from nine brands.
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Lim HS, Choi E, Hwang JY, Lee G, Yun SS, Kim M. Improved method for the determination of 12 non-nutritive sweeteners and monitoring in various foods using liquid chromatography-tandem mass spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2018; 35:1674-1688. [PMID: 29902385 DOI: 10.1080/19440049.2018.1486043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
An improved and highly sensitive method was developed and validated for the determination of 12 (7 permitted and 5 non-permitted in Korea) non-nutritive sweeteners in various foods using liquid chromatography-electrospray ionisation-tandem mass spectrometry. The chromatographic separation was performed on an Xbridge BEH C18 column (3 mm × 100 mm, 2.5 μm) with gradient elution using 10 mM ammonium acetate in water and 10 mM ammonium acetate in methanol. Sample preparation consisted of simple dilution, homogenisation, centrifugation and purification with a C18 cartridge prior to analysis. The relative matrix effect (%ME) was within ±20% for all sweeteners. The method also showed good linearity (R2 > 0.99). The limit of detection and limit of quantification values in sample were in the range of 0.02-2.66 and 0.06-8.05 mg kg-1, respectively. The recoveries at three concentration levels ranged between 80% and 119%, with relative standard deviation values below 10%. In addition, the expanded uncertainties determined for 12 sweeteners in 5 different food matrices were confirmed to be <14%. Finally, the method was successfully applied to the analysis of sweeteners in 681 food samples purchased in Korea, Australia and Turkey. These results demonstrate that the method is suitable for the simultaneous determination of multiple-sweeteners in a variety of foods.
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Affiliation(s)
- Ho Soo Lim
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
| | - EunA Choi
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
| | - Ju Young Hwang
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
| | - Gunyoung Lee
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
| | - Sang Soon Yun
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
| | - MeeKyung Kim
- a Food Additives and Packaging Division , National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea
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16
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Hood S, Peter T, Blanksby SJ, Marshall DL. Forensic analysis of water-based lubricants using liquid extraction surface analysis high-resolution tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1629-1636. [PMID: 29964357 DOI: 10.1002/rcm.8220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 06/18/2018] [Accepted: 06/20/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Analysis of water-based personal lubricants can provide pivotal information to law enforcement regarding sexual assault allegations, particularly in the absence of biological evidence. Traditional methodology for the extraction and analysis of water-based lubricants is cumbersome, time-consuming, and is often not sufficiently selective or sensitive to fully characterise the wide range of chemical components present within complex formulations. METHODS Liquid extraction surface analysis (LESA) was deployed in combination with high-resolution mass spectrometry (HRMS) and tandem mass spectrometry (MS/MS) to screen a range of water-based lubricants directly from contaminated cotton fabric. Rehydration of the fabric was the only sample preparation required. RESULTS Analysis of ten different water-based lubricants by nano-electrospray ionisation mass spectrometry in negative ion mode enabled discrimination based on the presence or absence of nine compounds, which were identified by comparison of their MS/MS spectra with those of available standards. Lubricants were successfully detected by LESA from stained fabric surfaces; even following extended periods of time between deposition and sampling. CONCLUSIONS A library encompassing the common components of water-based lubricants has been established using HRMS and tandem mass spectrometry to enable identification of personal lubricant formulations and differentiation between suppliers.
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Affiliation(s)
- Shiona Hood
- Forensic Chemistry Department, Qld Health Forensic and Scientific Services, 39 Kessels Road, Coopers Plains, QLD, AUSTRALIA, 4108
| | - Tony Peter
- Forensic Chemistry Department, Qld Health Forensic and Scientific Services, 39 Kessels Road, Coopers Plains, QLD, AUSTRALIA, 4108
| | - Stephen J Blanksby
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology, 2 George Street, Brisbane, QLD, AUSTRALIA, 4000
| | - David L Marshall
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology, 2 George Street, Brisbane, QLD, AUSTRALIA, 4000
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Wang XB, Zheng J, Li JJ, Yu HY, Li QY, Xu LH, Liu MJ, Xian RQ, Sun YE, Liu BJ. Simultaneous analysis of 23 illegal adulterated aphrodisiac chemical ingredients in health foods and Chinese traditional patent medicines by ultrahigh performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry. J Food Drug Anal 2018; 26:1138-1153. [PMID: 29976406 PMCID: PMC9303026 DOI: 10.1016/j.jfda.2018.02.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 01/31/2018] [Accepted: 02/12/2018] [Indexed: 12/31/2022] Open
Abstract
This paper presents an application of ultra high-performance liquid-chromatography-quadrupole-TOF high resolution mass spectrometry (UHPLC-Q-TOF HRMS) for simultaneous analysis of 23 illegal adulterated aphrodisiac type chemical ingredients in health foods and Chinese Traditional Patent Medicines (CTPMs). The mass spectrometer was operated in Information Dependent Acquisition (IDA) mode, which provides crucial information for the elemental composition analysis, structure elucidation and quantitative analysis simultaneously. Quantitative analysis was performed using the peak areas of the precursor ions in the XICs. The method validation included assessment of selectivity, sensitivity, calibration curve, accuracy, precision, recovery, matrix effect and stability. The results show good linear relationship with the concentrations of the analytes over wide concentration ranges (e.g., 0.05–10 μg/g for sildenafil) as all the fitting coefficients of determination r2 are >0.9984. The detection limits (LODs) were in the range of 0.002–0.1 μg/g. The recoveries were able to reach 82.5–103.6%, while the matrix effects ranged from 87.7 to 109.3%. The intra- and inter-day accuracies were in the range of 82.3–113.8%, while the intra- and inter-day precision ranged from 0.4 to 13.6%. Among 40 batches of health foods and 32 batches of CTPMs (including 28 capsules, 32 tablets, 10 liquid and 2 pills) samples, 28 batches of heath foods were positive. The detected chemical ingredients involved sildenafil, tadalafil, aildenafil and sulfoaildenafil. This method can be used for the screening, identification and quantification of illegal adulterated aphrodisiac chemical ingredients in health foods and CTPMs. Moreover, the LC-Q-TOF MS is very useful to structural elucidation of unknown compound.
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Kaufmann A, Widmer M, Maden K, Butcher P, Walker S. Analysis of a variety of inorganic and organic additives in food products by ion-pairing liquid chromatography coupled to high-resolution mass spectrometry. Anal Bioanal Chem 2018; 410:5629-5640. [DOI: 10.1007/s00216-018-0904-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/12/2018] [Accepted: 01/19/2018] [Indexed: 11/30/2022]
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Wibowotomo B, Eun JB, Rhee JI. Development of a Sequential Injection Analysis System for the Determination of Saccharin. SENSORS 2017; 17:s17122891. [PMID: 29231885 PMCID: PMC5751712 DOI: 10.3390/s17122891] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 12/11/2017] [Accepted: 12/11/2017] [Indexed: 11/16/2022]
Abstract
Saccharin is a powerfully sweet nonnutritive sweetener that has been approved for food-processing applications within the range of 100-1200 mg/kg. A simple, rapid, and cost-effective sequential injection analysis (SIA) technique was developed to determine the saccharin level. This method is based on the reaction of saccharin with p-chloranil in an ethanol medium with a hydrogen peroxide (H₂O₂) acceleration, and the resultant violet-red compound was detected using a UV-Vis spectrophotometer at λmax = 420 nm. To ascertain the optimal conditions for the SIA system, several parameters were investigated, including buffer flow rate and volume, p-chloranil concentration, and reactant volumes (saccharin, p-chloranil, and H₂O₂). The optimum setup of the SIA system was achieved with a buffer flow rate, buffer volume, and draw-up time of 1.2 mL/min, 2900 µL, and ~145 s, respectively. The optimal p-chloranil concentration is 30 mM, and the best reactant volumes, presented in an ordered sequence, are as follows: 30 µL of H₂O₂, 450 µL of saccharin, and 150 µL of p-chloranil. The optimized SIA configuration produced a good linear calibration curve with a correlation coefficient (R² = 0.9812) in the concentration range of 20-140 mg/L and with a detection limit of 19.69 mg/L. Analytical applications in different food categories also showed acceptable recovery values in the range of 93.1-111.5%. This simple and rapid SIA system offers great feasibility for the saccharin quality control in food-product processing.
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Affiliation(s)
- Budi Wibowotomo
- Department of Food Science and Technology and Functional Food Research Center, Chonnam National University, YongBong-Ro 77, Gwangju 61186, Korea.
- Department of Industrial Technology, The State University of Malang, Jl Semarang 5, Malang 65145, Indonesia.
| | - Jong-Bang Eun
- Department of Food Science and Technology and Functional Food Research Center, Chonnam National University, YongBong-Ro 77, Gwangju 61186, Korea.
| | - Jong Il Rhee
- School of Chemical Engineering and Research Center for Biophotonics, Chonnam National University, YongBong-Ro 77, Gwangju 61186, Korea.
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Simultaneous determination of aspartame, cyclamate, saccharin and acesulfame-K in powder tabletop sweeteners by FT-Raman spectroscopy associated with the multivariate calibration: PLS, iPLS and siPLS models were compared. Food Res Int 2017; 99:106-114. [PMID: 28784466 DOI: 10.1016/j.foodres.2017.05.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 05/04/2017] [Accepted: 05/07/2017] [Indexed: 12/19/2022]
Abstract
For the first time, a procedure for simultaneous determination of the main artificial sweeteners, aspartame (ASP), cyclamate (CYC), saccharin (SAC), and acesulfame-K (ACSK) by a spectroscopic method associated with the multivariate calibration is proposed. These analytes were quantified in tabletop sweeteners samples using FT-Raman spectroscopy. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used as reference method. Partial least squares (PLS), interval PLS (iPLS), and synergism PLS (siPLS) methods were evaluated in a comparative study where the selected interval models presented better results. Multivariate regression models, such as PLS, iPLS and siPLS were built and the lower root mean square errors for prediction (RMSEP) found were 0.027-0.031% w/w, 0.316-0.363% w/w, 0.082-0.184% w/w, and 0.040-0.049% w/w to ASP, CYC, SAC, and ACSK, respectively. The coefficient of determination for prediction (R2p) varied between 0.978 and 0.979, 0.969-0.977, 0.952-0.994, and 0.959-0.965 for ASP, CYC, SAC and ACSK, respectively. The analysis of model's residues was made by bias and permutation tests to evaluate systematic and trend errors. The selected intervals by iPLS and siPLS were evaluated and the bands related to the vibrational modes of the analytes were assigned with the aid of density functional theory calculations (DFT).
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Bathinapatla A, Kanchi S, Singh P, Sabela MI, Bisetty K. Fabrication of copper nanoparticles decorated multiwalled carbon nanotubes as a high performance electrochemical sensor for the detection of neotame. Biosens Bioelectron 2015; 67:200-7. [DOI: 10.1016/j.bios.2014.08.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/25/2014] [Accepted: 08/04/2014] [Indexed: 10/24/2022]
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