1
|
Dikici E, Önal Acet B, Acet Ö, Odabaşı M. “Lab-on-pol” colormatic sensor platforms: Melamine detection with color change on melamine imprinted membranes. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
2
|
Delatour T, Becker F, Krause J, Romero R, Gruna R, Längle T, Panchaud A. Handheld Spectral Sensing Devices Should Not Mislead Consumers as Far as Non-Authentic Food Is Concerned: A Case Study with Adulteration of Milk Powder. Foods 2021; 11:foods11010075. [PMID: 35010202 PMCID: PMC8750415 DOI: 10.3390/foods11010075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 11/16/2022] Open
Abstract
With the rising trend of consumers being offered by start-up companies portable devices and applications for checking quality of purchased products, it appears of paramount importance to assess the reliability of miniaturized sensors embedded in such devices. Here, eight sensors were assessed for food fraud applications in skimmed milk powder. The performance was evaluated with dry- and wet-blended powders mimicking adulterated materials by addition of either ammonium sulfate, semicarbazide, or cornstarch in the range 0.5-10% of profit. The quality of the spectra was assessed for an adequate identification of the outliers prior to a deep assessment of performance for both non-targeted (soft independent modelling of class analogy, SIMCA) and targeted analyses (partial least square regression with orthogonal signal correction, OPLS). Here, we show that the sensors have generally difficulties in detecting adulterants at ca. 5% supplementation, and often fail in achieving adequate specificity and detection capability. This is a concern as they may mislead future users, particularly consumers, if they are intended to be developed for handheld devices available publicly in smartphone-based applications.
Collapse
Affiliation(s)
- Thierry Delatour
- Société des Produits Nestlé S.A., Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (R.R.); (A.P.)
- Correspondence:
| | - Florian Becker
- Fraunhofer IOSB, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, Fraunhoferstrasse 1, 76131 Karlsruhe, Germany; (F.B.); (J.K.); (R.G.); (T.L.)
| | - Julius Krause
- Fraunhofer IOSB, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, Fraunhoferstrasse 1, 76131 Karlsruhe, Germany; (F.B.); (J.K.); (R.G.); (T.L.)
| | - Roman Romero
- Société des Produits Nestlé S.A., Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (R.R.); (A.P.)
| | - Robin Gruna
- Fraunhofer IOSB, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, Fraunhoferstrasse 1, 76131 Karlsruhe, Germany; (F.B.); (J.K.); (R.G.); (T.L.)
| | - Thomas Längle
- Fraunhofer IOSB, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, Fraunhoferstrasse 1, 76131 Karlsruhe, Germany; (F.B.); (J.K.); (R.G.); (T.L.)
| | - Alexandre Panchaud
- Société des Produits Nestlé S.A., Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (R.R.); (A.P.)
| |
Collapse
|
3
|
Öztürk S, Demir N. Development of a novel IMAC sorbent for the identification of melamine in dairy products by HPLC. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103931] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
4
|
Li L, Chin WS. Rapid and sensitive SERS detection of melamine in milk using Ag nanocube array substrate coupled with multivariate analysis. Food Chem 2021; 357:129717. [PMID: 33964627 DOI: 10.1016/j.foodchem.2021.129717] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/15/2021] [Accepted: 03/24/2021] [Indexed: 12/14/2022]
Abstract
In this study, a facile Ag nanocube (NC) array substrate was fabricated for rapid SERS detection of melamine in milk. This easily-prepared substrate exhibited high Raman enhancement factor (~1.02 × 105) and good reproducibility with ~10.75% spot-to-spot variation in Raman intensity. Our proposed method can detect melamine as low as 0.01 ppm in standard solutions and 0.5 ppm in real milk samples after a simple one-step solvent extraction. Two multivariate analysis tools including partial least squares and support vector machines (SVM) were explored to develop reliable regression models for quantitative SERS analysis of melamine. By comparison, SVM regression models exhibited better predictive performance, especially in liquid milk, with root mean square error (RMSE) of calibration = 5.5783, coefficient of determination (R2) of calibration = 0.9807, RMSE of prediction = 1.9636, and R2 of prediction = 0.9736. Hence, this study offers a rapid and sensitive detection of adulterant melamine in milk samples.
Collapse
Affiliation(s)
- Limin Li
- Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Wee Shong Chin
- Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| |
Collapse
|
5
|
Gerssen A, Bovee TH, van Ginkel LA, van Iersel ML, Hoogenboom RL. Food and feed safety: Cases and approaches to identify the responsible toxins and toxicants. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
6
|
Wu S, Qian L, Huang L, Sun X, Su H, Gurav DD, Jiang M, Cai W, Qian K. A Plasmonic Mass Spectrometry Approach for Detection of Small Nutrients and Toxins. NANO-MICRO LETTERS 2018; 10:52. [PMID: 30393701 PMCID: PMC6199099 DOI: 10.1007/s40820-018-0204-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 04/17/2018] [Indexed: 05/23/2023]
Abstract
Nutriology relies on advanced analytical tools to study the molecular compositions of food and provide key information on sample quality/safety. Small nutrients detection is challenging due to the high diversity and broad dynamic range of molecules in food samples, and a further issue is to track low abundance toxins. Herein, we developed a novel plasmonic matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) approach to detect small nutrients and toxins in complex biological emulsion samples. Silver nanoshells (SiO2@Ag) with optimized structures were used as matrices and achieved direct analysis of ~ 6 nL of human breast milk without any enrichment or separation. We performed identification and quantitation of small nutrients and toxins with limit-of-detection down to 0.4 pmol (for melamine) and reaction time shortened to minutes, which is superior to the conventional biochemical method currently in use. The developed approach contributes to the near-future application of MALDI MS in a broad field and personalized design of plasmonic materials for real-case bio-analysis.
Collapse
Affiliation(s)
- Shu Wu
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Linxi Qian
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China
| | - Lin Huang
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Xuming Sun
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Haiyang Su
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Deepanjali D Gurav
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Mawei Jiang
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China
| | - Wei Cai
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, Shanghai, 200092, People's Republic of China.
| | - Kun Qian
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China.
| |
Collapse
|
7
|
Frank N, Bessaire T, Tarres A, Goyon A, Delatour T. Development of a quantitative multi-compound method for the detection of 14 nitrogen-rich adulterants by LC-MS/MS in food materials. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:1842-1852. [DOI: 10.1080/19440049.2017.1372640] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Nancy Frank
- Nestlé Research Centre, Nestec Ltd., Lausanne, Switzerland
| | | | | | | | | |
Collapse
|
8
|
Automatic ionic liquid-enhanced membrane microextraction for the determination of melamine in food samples. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.03.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
Fry H, Mietle K, Mähnert E, Zinke S, Schwieters M, Pydde E, Preiß-Weigert A. Interlaboratory validation of an LC-MS/MS method for the determination of melamine and cyanuric acid in animal feed. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:1320-1332. [PMID: 28332413 DOI: 10.1080/19440049.2017.1307527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Melamine and cyanuric acid have been mixed illegally into food and feed to increase the nitrogen content, which results in deceptively high protein contents. As a consequence, a maximum level for melamine of 2.5 mg kg-1 feed was established by the European Union under Directive 2002/32/EC. The Technical Committee (TC) 327 of the European Committee for Standardisation (CEN) commissioned the standardisation of a method for the analysis of melamine and cyanuric acid in animal feed. One main task in the standardisation process is the performance of a full international collaborative trial, which is described in this paper. After performing a pre-trial study, in the main study eight different feed samples with different concentration levels of melamine and/or cyanuric acid were distributed as double-blind samples to 13 participants. The minimum criterion of eight laboratories submitting results per sample is fulfilled for melamine but only partly for cyanuric acid. The evaluation showed for both analytes a Horwitz ratio (HorRat) well below 2, and meets the requirements stated in the appropriate international protocols. The results demonstrated that the method seems to be suitable for the analysis of melamine and cyanuric acid in animal feed.
Collapse
Affiliation(s)
- Hildburg Fry
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Kerstin Mietle
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Eileen Mähnert
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Sebastian Zinke
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Mandy Schwieters
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Emanuele Pydde
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| | - Angelika Preiß-Weigert
- a Department Safety in the Food Chain , Federal Institute for Risk Assessment , Berlin , Germany
| |
Collapse
|
10
|
Peris-Vicente J, Albiol-Chiva J, Roca-Genovés P, Esteve-Romero J. Advances on melamine determination by micellar liquid chromatography: A review. J LIQ CHROMATOGR R T 2016. [DOI: 10.1080/10826076.2016.1152482] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Juan Peris-Vicente
- Química Bioanalítica, QFA, ESTCE, Campus del Riu Sec, Universitat Jaume I, Castelló, Spain
| | - Jaume Albiol-Chiva
- Química Bioanalítica, QFA, ESTCE, Campus del Riu Sec, Universitat Jaume I, Castelló, Spain
| | - Pasqual Roca-Genovés
- Química Bioanalítica, QFA, ESTCE, Campus del Riu Sec, Universitat Jaume I, Castelló, Spain
| | - Josep Esteve-Romero
- Química Bioanalítica, QFA, ESTCE, Campus del Riu Sec, Universitat Jaume I, Castelló, Spain
| |
Collapse
|
11
|
Raman spectral imaging for quantitative contaminant evaluation in skim milk powder. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2016. [DOI: 10.1007/s11694-016-9316-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Nieuwoudt MK, Holroyd SE, McGoverin CM, Simpson MC, Williams DE. Raman spectroscopy as an effective screening method for detecting adulteration of milk with small nitrogen-rich molecules and sucrose. J Dairy Sci 2016; 99:2520-2536. [PMID: 26874427 DOI: 10.3168/jds.2015-10342] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 12/10/2015] [Indexed: 11/19/2022]
Abstract
Adulteration of milk for commercial gain is acknowledged as a serious issue facing the dairy industry. Several analytical techniques can be used to detect adulteration but they often require time-consuming sample preparation, expensive laboratory equipment, and highly skilled personnel. Here we show that Raman spectroscopy provides a simple, selective, and sensitive method for screening milk, specifically for small nitrogen-rich compounds, such as melamine, urea, ammonium sulfate, dicyandiamide, and for sucrose. Univariate and multivariate statistical methods were used to determine limits of detection and quantification from Raman spectra of milk spiked with 50 to 1,000 mg/L of the N-rich compounds and 0.25 to 4% sucrose. Partial least squares (PLS) calibration provided limit of detection minimum thresholds <200mg/L (0.02%) for the 4 N-rich compounds and <0.8% for sucrose, without the need for surface-enhanced Raman spectroscopy. The results show high reproducibility (7% residual standard deviation) and 100% efficiency for screening of milk for these adulterants.
Collapse
Affiliation(s)
- M K Nieuwoudt
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand; The Photon Factory, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand; School of Chemical Sciences, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand.
| | - S E Holroyd
- Fonterra Research & Development Centre, Private Bag 11029, Palmerston North, New Zealand
| | - C M McGoverin
- The Dodd Walls Centre for Photonic and Quantum Technologies, New Zealand; Department of Physics, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand
| | - M C Simpson
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand; The Photon Factory, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand; School of Chemical Sciences, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand; The Dodd Walls Centre for Photonic and Quantum Technologies, New Zealand; Department of Physics, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand
| | - D E Williams
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand; School of Chemical Sciences, The University of Auckland, 23 Symonds St., Auckland, 1142 New Zealand
| |
Collapse
|
13
|
de Jong J, López P, Mol H, Baeten V, Fernández Pierna JA, Vermeulen P, Vincent U, Boix A, von Holst C, Tomaniova M, Hajslova J, Yang Z, Han L, MacDonald S, Haughey SA, Elliott CT. Analytical strategies for the early quality and safety assurance in the global feed chain. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
14
|
Al Bakain RZ, Al-Degs YS, El-Sheikh AH, Al-Reyahi AY, Abu-Wardeh AH. A Quick Detection of Melamine Adulteration in Milk and Dairy Products Using First-Order Multivariate Calibration. J FOOD PROCESS PRES 2015. [DOI: 10.1111/jfpp.12522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramia Z. Al Bakain
- Department of Chemistry; Faculty of Science; The University of Jordan; Amman Jordan
| | - Yahya S. Al-Degs
- Chemistry Department; The Hashemite University; PO Box 150459 Zarqa Jordan
| | - Amjad H. El-Sheikh
- Chemistry Department; The Hashemite University; PO Box 150459 Zarqa Jordan
| | - Anas Y. Al-Reyahi
- Orientation Year Deanship; Sattam Bin Abdul-Aziz University; Al-Kharj Saudi Arabia
| | | |
Collapse
|
15
|
|
16
|
Meng Z, Shi Z, Liang S, Dong X, Lv Y, Sun H. Rapid screening and quantification of cyromazine, melamine, ammelide, ammeline, cyanuric acid, and dicyandiamide in infant formula by ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry and triple quadrupole mass spectrometry. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.02.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
17
|
Huang Y, Tian K, Min S, Xiong Y, Du G. Distribution assessment and quantification of counterfeit melamine in powdered milk by NIR imaging methods. Food Chem 2015; 177:174-81. [DOI: 10.1016/j.foodchem.2015.01.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 04/22/2014] [Accepted: 01/03/2015] [Indexed: 12/01/2022]
|
18
|
A novel dispersive micro solid phase extraction using PCX as the sorbent for the determination of melamine and cyromazine in milk and milk powder by UHPLC-HRMS/MS. Talanta 2015; 134:144-152. [DOI: 10.1016/j.talanta.2014.10.036] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 10/13/2014] [Accepted: 10/16/2014] [Indexed: 11/22/2022]
|
19
|
Domingo EDC, Tireli AA, Nunes CA, Batista AV, Guerreiro MC, Pinto SM. Rapid extraction of melamine in powdered milk for direct electrospray ionization tandem mass spectrometry analysis. Talanta 2015; 132:535-40. [DOI: 10.1016/j.talanta.2014.10.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 09/25/2014] [Accepted: 10/01/2014] [Indexed: 10/24/2022]
|
20
|
Lu Y, Xia Y, Pan M, Wang X, Wang S. Development of a surface plasmon resonance immunosensor for detecting melamine in milk products and pet foods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:12471-12476. [PMID: 25473730 DOI: 10.1021/jf504055g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A sensitive and stable surface plasmon resonance (SPR) immunosensor based on the inhibition format was developed and validated for detecting melamine (MEL) in milk products and pet foods. The sensitivity and the limit of detection (LOD) of the proposed method for MEL were 2.32 × 10(-2) and 1.4 × 10(-3) μg/mL, respectively. The immunosensor was highly specific to MEL, which displayed only low cross-reactivity (CR) (<0.01%) for cyanuric acid, cyanuric chloride, and atrazine. The assay was validated for the detection of MEL in full-cream milk, skim milk powder, infant formula, dog food, and cat food. Most of the recovery results ranged between 76 and 115%. The sensitivities of the assay in each type of sample were 2.57 × 10(-2) μg/mL, 2.32 × 10(-2) μg/kg, 2.51 × 10(-2) μg/kg, 2.66 × 10(-2) μg/kg, and 2.68 × 10(-2) μg/kg, respectively, which were much lower than the maximum residue levels (MRLs) of MEL.
Collapse
Affiliation(s)
- Yang Lu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology , Tianjin 300457, China
| | | | | | | | | |
Collapse
|
21
|
Domingo E, Tirelli AA, Nunes CA, Guerreiro MC, Pinto SM. Melamine detection in milk using vibrational spectroscopy and chemometrics analysis: A review. Food Res Int 2014. [DOI: 10.1016/j.foodres.2013.11.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
22
|
Zhang S, Yu Z, Hu N, Sun Y, Suo Y, You J. Sensitive determination of melamine leached from tableware by reversed phase high-performance liquid chromatography using 10-methyl-acridone-2-sulfonyl chloride as a pre-column fluorescent labeling reagent. Food Control 2014. [DOI: 10.1016/j.foodcont.2013.10.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
23
|
Gong Y, Zhang M, Wang M, Chen Z, Xi X. Development of Immuno-Based Methods for Detection of Melamine. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2014. [DOI: 10.1007/s13369-014-1116-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
24
|
Colorimetric and visual read-out determination of cyanuric acid exploiting the interaction between melamine and silver nanoparticles. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1163-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Khlifi A, Gam-Derouich S, Jouini M, Kalfat R, Chehimi MM. Melamine-imprinted polymer grafts through surface photopolymerization initiated by aryl layers from diazonium salts. Food Control 2013. [DOI: 10.1016/j.foodcont.2012.10.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
26
|
Multi-class method for determination of veterinary drug residues and other contaminants in infant formula by ultra performance liquid chromatography–tandem mass spectrometry. Food Chem 2013; 138:827-34. [DOI: 10.1016/j.foodchem.2012.09.130] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 09/04/2012] [Accepted: 09/23/2012] [Indexed: 11/19/2022]
|
27
|
Analytical chemistry, toxicology, epidemiology and health impact assessment of melamine in infant formula: Recent progress and developments. Food Chem Toxicol 2013; 56:325-35. [DOI: 10.1016/j.fct.2013.02.044] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/18/2013] [Accepted: 02/21/2013] [Indexed: 11/23/2022]
|
28
|
Wang P, Dong JX, Li NB, Luo HQ. Highly sensitive detection of melamine based on gemini surfactant using enhanced resonance Rayleigh scattering signals. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:38-44. [PMID: 23257328 DOI: 10.1016/j.saa.2012.10.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/09/2012] [Accepted: 10/25/2012] [Indexed: 06/01/2023]
Abstract
We present here a resonance Rayleigh scattering (RRS) spectrum method for the determination of melamine at the nanogram level using a gemini surfactant (disodium 4-dodecyl-2,4'-oxydibenzenesulfonate, DDOF). It was found that DDOF could react with cationic melamine to form an ion-association complex, which induced the enhancement of RRS intensity and the appearance of a new RRS spectrum in acetate buffer (pH 3.6). The RRS spectral characteristics of the melamine-DDOF system, the optimum conditions of the reaction, and the influencing factors have been investigated. Under optimum conditions, the enhanced RRS intensity was proportional to the concentration of melamine in the range of 0.38-6.30 μg/mL. The method has high sensitivity, and the detection limit for melamine is 8.48 ng/mL. Furthermore, the reaction mechanism and the reasons of RRS enhancement were evaluated.
Collapse
Affiliation(s)
- Peng Wang
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | | | | | | |
Collapse
|
29
|
Viñas P, Campillo N, Férez-Melgarejo G, Hernández-Córdoba M. Determination of Melamine and Derivatives in Foods by Liquid Chromatography Coupled to Atmospheric Pressure Chemical Ionization Mass Spectrometry and Diode Array Detection. ANAL LETT 2012. [DOI: 10.1080/00032719.2012.694941] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
30
|
Hilding-Ohlsson A, Fauerbach JA, Sacco NJ, Bonetto MC, Cortón E. Voltamperometric discrimination of urea and melamine adulterated skimmed milk powder. SENSORS (BASEL, SWITZERLAND) 2012; 12:12220-34. [PMID: 23112709 PMCID: PMC3478836 DOI: 10.3390/s120912220] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/06/2012] [Accepted: 08/15/2012] [Indexed: 11/16/2022]
Abstract
Nitrogen compounds like urea and melamine are known to be commonly used for milk adulteration resulting in undesired intoxication; a well-known example is the Chinese episode occurred in 2008. The development of a rapid, reliable and economic test is of relevance in order to improve adulterated milk identification. Cyclic voltammetry studies using an Au working electrode were performed on adulterated and non-adulterated milk samples from different independent manufacturers. Voltammetric data and their first derivative were subjected to functional principal component analysis (f-PCA) and correctly classified by the KNN classifier. The adulterated and non-adulterated milk samples showed significant differences. Best results of prediction were obtained with first derivative data. Detection limits in milk samples adulterated with 1% of its total nitrogen derived from melamine or urea were as low as 85.0 mg · L(-1) and 121.4 mg · L(-1), respectively. We present this method as a fast and robust screening method for milk adulteration analysis and prevention of food intoxication.
Collapse
Affiliation(s)
- Astrid Hilding-Ohlsson
- Biosensors and Bioanalysis Lab, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (IQUIBICEN, CONICET), CABA 1428, Argentina; E-Mails: (A.H.-O.); (N.J.S.); (M.C.B.)
| | - Jonathan A. Fauerbach
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (CIHIDECAR, CONICET), CABA 1428, Argentina; E-Mail:
| | - Natalia J. Sacco
- Biosensors and Bioanalysis Lab, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (IQUIBICEN, CONICET), CABA 1428, Argentina; E-Mails: (A.H.-O.); (N.J.S.); (M.C.B.)
| | - M. Celina Bonetto
- Biosensors and Bioanalysis Lab, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (IQUIBICEN, CONICET), CABA 1428, Argentina; E-Mails: (A.H.-O.); (N.J.S.); (M.C.B.)
| | - Eduardo Cortón
- Biosensors and Bioanalysis Lab, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (IQUIBICEN, CONICET), CABA 1428, Argentina; E-Mails: (A.H.-O.); (N.J.S.); (M.C.B.)
| |
Collapse
|
31
|
Filazi A, Sireli UT, Ekici H, Can HY, Karagoz A. Determination of melamine in milk and dairy products by high performance liquid chromatography. J Dairy Sci 2012; 95:602-8. [PMID: 22281324 DOI: 10.3168/jds.2011-4926] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Accepted: 10/13/2011] [Indexed: 11/19/2022]
Abstract
A simple, precise, accurate, and validated reverse-phase HPLC method was developed for the determination of melamine in milk (pasteurized and UHT milk) and dairy products (powdered infant formula, fruit yogurt, soft cheese, and milk powder). Following extraction with acetonitrile:water (50:50, vol/vol), samples were purified by filter (0.45 μm), separated on a Nucleosil C8 column (4.6 mm × 250 mm, 3 μm) with acetonitrile:10 mmol/L sodium L-octane sulfonate (pH 3.1; 15:85, vol/vol) as mobile phase at a flow rate of 1 mL/min, and determined by a photodiode array detector. A linear calibration curve was obtained in the concentration range from 0.05 to 5 mg/kg. Milk and dairy products were fortified with melamine at 4 levels producing average recovery yields of 95 to 109%. The limits of detection and quantification of melamine were 35 to 110 and 105 to 340 μg/kg, respectively. The method was then used to analyze 300 samples of milk and dairy products purchased from major retailers in Turkey. Melamine was not found in infant formulas and pasteurized UHT milk, whereas 2% of cheese, 8% of milk powder, and 44% of yogurt samples contained melamine at the 121, 694±146, and 294±98 μg/kg levels, respectively. These findings were below the limits set by the Codex Alimentarius Commission and European Union legislation. This is the first study to confirm the existence of melamine in milk and dairy products in Turkey. Consumption of foods containing these low levels of melamine does not constitute a health risk for consumers.
Collapse
Affiliation(s)
- A Filazi
- Department of Pharmacology and Toxicology, Ankara University, Faculty of Veterinary Medicine, Ankara, Turkey 06110.
| | | | | | | | | |
Collapse
|
32
|
Wang GL, Jiao HJ, Zhu XY, Dong YM, Li ZJ. Enhanced fluorescence sensing of melamine based on thioglycolic acid-capped CdS quantum dots. Talanta 2012; 93:398-403. [DOI: 10.1016/j.talanta.2012.02.062] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 02/23/2012] [Accepted: 02/25/2012] [Indexed: 11/26/2022]
|
33
|
Kämmer E, Dörfer T, Csáki A, Schumacher W, Da Costa Filho PA, Tarcea N, Fritzsche W, Rösch P, Schmitt M, Popp J. Evaluation of Colloids and Activation Agents for Determination of Melamine Using UV-SERS. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:6083-6091. [PMID: 22428076 PMCID: PMC3304507 DOI: 10.1021/jp211863y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 02/10/2012] [Indexed: 05/27/2023]
Abstract
UV-SERS measurements offer a great potential for environmental or food (detection of food contaminats) analytics. Here, the UV-SERS enhancement potential of various kinds of metal colloids, such as Pd, Pt, Au, Ag, Au-Ag core-shell, and Ag-Au core-shell with different shapes and sizes, were studied using melamine as a test molecule. The influence of different activation (KF, KCl, KBr, K(2)SO(4)) agents onto the SERS activity of the nanomaterials was investigated, showing that the combination of a particular nanoparticle with a special activation agent is extremely crucial for the observed SERS enhancement. In particular, the size dependence of spherical nanoparticles of one particular metal on the activator has been exploited. By doing so, it could be shown that the SERS enhancement increases or decreases for increasing or decreasing size of a nanoparticle, respectively. Overall, the presented results demonstrate the necessity to adjust the nanoparticle size and the activation agent for different experiments in order to achieve the best possible UV-SERS results.
Collapse
Affiliation(s)
- Evelyn Kämmer
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
- Institute of Photonic
Technology, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Thomas Dörfer
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
- Institute of Photonic
Technology, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Andrea Csáki
- Institute of Photonic
Technology, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Wilm Schumacher
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
| | | | - Nicolae Tarcea
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
| | - Wolfgang Fritzsche
- Institute of Photonic
Technology, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Petra Rösch
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry
and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
- Institute of Photonic
Technology, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| |
Collapse
|
34
|
Huang HY, Lin CL, Jiang SH, Singco B, Cheng YJ. Capillary electrochromatography–mass spectrometry determination of melamine and related triazine by-products using poly(divinyl benzene-alkene-vinylbenzyl trimethylammonium chloride) monolithic stationary phases. Anal Chim Acta 2012; 719:96-103. [DOI: 10.1016/j.aca.2011.12.073] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 12/26/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
|
35
|
Koh G, Chia RSC, Lin Q, Cheow PS, Teo TL, Lee TK. Determination of melamine in milk powder using gas chromatography-high-resolution isotope dilution mass spectrometry. J Sep Sci 2011; 34:3043-52. [DOI: 10.1002/jssc.201100285] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 07/05/2011] [Accepted: 07/29/2011] [Indexed: 11/09/2022]
|
36
|
Lutter P, Savoy-Perroud MC, Campos-Gimenez E, Meyer L, Goldmann T, Bertholet MC, Mottier P, Desmarchelier A, Monard F, Perrin C, Robert F, Delatour T. Screening and confirmatory methods for the determination of melamine in cow’s milk and milk-based powdered infant formula: Validation and proficiency-tests of ELISA, HPLC-UV, GC-MS and LC-MS/MS. Food Control 2011. [DOI: 10.1016/j.foodcont.2010.11.022] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Hou S, Ding M. Determination of Cyanuric Acid in Milk Powder and Swimming Pool Water by Ion-pair Reversed-phase Liquid Chromatography. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
38
|
Guo Z, Gai P, Hao T, Wang S, Wei D, Gan N. Determination of melamine in dairy products by an electrochemiluminescent method combined with solid-phase extraction. Talanta 2011; 83:1736-41. [DOI: 10.1016/j.talanta.2010.12.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 11/20/2010] [Accepted: 12/04/2010] [Indexed: 11/16/2022]
|
39
|
Sun H, Qin X, Ge X, Wang L. Effective separation and sensitive determination of cyanuric acid, melamine and cyromazine in environmental water by reversed phase high-performance liquid chromatography. ENVIRONMENTAL TECHNOLOGY 2011; 32:317-323. [PMID: 21780700 DOI: 10.1080/09593330.2010.499543] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A new method for the simultaneous determination of cyanuric acid (CA), melamine (MM) and cyromazine (CM) in different water samples was developed by using reversed phase high-performance liquid chromatography diode-array detection (RP-HPLC-DAD). The conditions of HPLC were investigated and optimized. A KROMASIL C18 column (250 x 4.6 mm ID, 5 microm) was used for the RP-HPLC using gradient elution with a mobile phase composed of 0.1 mM KH2PO4-K2HPO4 buffer solution (pH = 7.3) and methanol (75:25, v/v). The conditions for HPLC were investigated and optimized. Under optimal conditions, the linearity was satisfactory in the range of 0.04-10.00 microg/mL with a correlation coefficient of 0.999, and the method limits of detection (LODs) of the proposed method were 0.02 microg/mL for CA and CM, and 0.01 microg/mL for MM. The recoveries were: 96.0-116.0% with relative standard deviations (RSDs) of 0.9-5.7% for CA, 94.3-115.0% with RSDs of 1.5-5.3% for MM, and 91.0-112.0% with RSDs (n = 6) of 1.0-4.9% for CM. The proposed method can permit the detection of CA and CM at levels as low as 0.07 microg/mL and MM at levels as low as 0.03 microg/mL in environmental water samples.
Collapse
Affiliation(s)
- Hanwen Sun
- College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China.
| | | | | | | |
Collapse
|
40
|
Guo L, Zhong J, Wu J, Fu F, Chen G, Chen Y, Zheng X, Lin S. Sensitive turn-on fluorescent detection of melamine based on fluorescence resonance energy transfer. Analyst 2011; 136:1659-63. [DOI: 10.1039/c0an00675k] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Sun F, Ma W, Xu L, Zhu Y, Liu L, Peng C, Wang L, Kuang H, Xu C. Analytical methods and recent developments in the detection of melamine. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2010.06.011] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
42
|
Rodriguez Mondal AM, Desmarchelier A, Konings E, Acheson-Shalom R, Delatour T. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) method extension to quantify simultaneously melamine and cyanuric acid in egg powder and soy protein in addition to milk products. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:11574-11579. [PMID: 21038852 DOI: 10.1021/jf102900k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
As a consequence of the adulteration of infant formulas and milk powders with melamine (MEL) in China in 2008, much attention has been devoted to the analysis of MEL [and cyanuric acid (CA)] in dairy products. Several methods based on high-performance liquid chromatography (HPLC), liquid chromatography-tandem mass spectrometry (LC-MS/MS), nuclear magnetic resonance (NMR), or Raman spectroscopy have been described in the literature. However, no method is available for the simultaneous determination of MEL and CA in other raw materials, which are considered as high-risk materials for economically motivated adulteration. The present paper reports the results of an interlaboratory-based performance evaluation conducted with seven laboratories worldwide. The purpose was to demonstrate the ability of a cleanup-free LC-MS/MS method, originally developed for cow's milk and milk-powdered infant formula, to quantify MEL and CA in egg powder and soy protein. Limit of detection (LOD) and limit of quantification (LOQ) were 0.02 and 0.05 mg/kg for MEL in egg powder and soy protein, respectively. For CA, LOD and LOQ were 0.05 and 0.10 mg/kg in egg powder and 1.0 and 1.50 mg/kg in soy protein, respectively. Recoveries ranged within a 97-113% range for both MEL and CA in egg powder and soy protein. Reproducibility values (RSD(R)) from seven laboratories were within a 5.4-11.7% range for both analytes in the considered matrices. Horwitz ratio (HorRat) values between 0.4 and 0.7 indicate acceptable among-laboratory precision for the method described.
Collapse
|
43
|
Rapid and High-Throughput Determination of Melamine in Milk Products and Eggs by Full Automatic On-line Polymer Monolith Microextraction Coupled to High-Performance Liquid Chromatography. FOOD ANAL METHOD 2010. [DOI: 10.1007/s12161-010-9181-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
44
|
Panuwet P, Wade EL, Nguyen JV, Montesano MA, Needham LL, Barr DB. Quantification of cyanuric acid residue in human urine using high performance liquid chromatography–tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:2916-22. [DOI: 10.1016/j.jchromb.2010.08.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 07/12/2010] [Accepted: 08/14/2010] [Indexed: 11/16/2022]
|
45
|
Cao Q, Zhao H, He Y, Li X, Zeng L, Ding N, Wang J, Yang J, Wang G. Hydrogen-bonding-induced colorimetric detection of melamine by nonaggregation-based Au-NPs as a probe. Biosens Bioelectron 2010; 25:2680-5. [DOI: 10.1016/j.bios.2010.04.046] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Revised: 04/29/2010] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
|
46
|
Rambla-Alegre M, Peris-Vicente J, Marco-Peiró S, Beltrán-Martinavarro B, Esteve-Romero J. Development of an analytical methodology to quantify melamine in milk using micellar liquid chromatography and validation according to EU Regulation 2002/654/EC. Talanta 2010; 81:894-900. [DOI: 10.1016/j.talanta.2010.01.034] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 01/08/2010] [Accepted: 01/17/2010] [Indexed: 10/19/2022]
|
47
|
Pretreatment-free fast ultraviolet detection of melamine in milk products with a disposable microfluidic device. J Chromatogr A 2010; 1217:785-9. [DOI: 10.1016/j.chroma.2009.12.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2009] [Revised: 11/21/2009] [Accepted: 12/01/2009] [Indexed: 11/21/2022]
|
48
|
WANG H, HOU S, DING M, ZHANG J. Determination of Cyanuric Acid in Milk Powder by Anion-exchange Chromatography. ANAL SCI 2010; 26:1305-8. [DOI: 10.2116/analsci.26.1305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hui WANG
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University
| | - Shengjie HOU
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University
| | - Mingyu DING
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University
| | | |
Collapse
|