1
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Walter TH, Alden BA, Berthelette K, Field JA, Lawrence NL, McLaughlin J, Patel AV. Characterization of a highly stable zwitterionic hydrophilic interaction chromatography stationary phase based on hybrid organic/inorganic particles. J Sep Sci 2021; 45:1389-1399. [PMID: 34937126 PMCID: PMC9487986 DOI: 10.1002/jssc.202100859] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 11/08/2022]
Abstract
We have characterized a sulfobetaine stationary phase based on 1.7 μm ethylene-bridged hybrid organic/inorganic particles, which is intended for use in hydrophilic interaction chromatography. The efficiency of columns packed with this material were determined as a function of flow rate, demonstrating a minimum reduced plate height of 2.4. The batch-to-batch reproducibility was assessed using the separation of a mixture of acids, bases and neutrals. We compared the retention and selectivity of the hybrid sulfobetaine stationary phase to that of several benchmark materials. The hybrid sulfobetaine material gave strong retention for polar neutrals and high selectivity for methyl groups, hydroxy groups and configurational isomers. Large differences in cation and anion retention were observed among the columns. We characterized the acid and base stability of the hybrid sulfobetaine stationary phase, using accelerated tests at pH 1.3 and 11.0, both at 70°C. The results support a recommended pH range of 2 to 10. We also investigated the performance of columns packed with this material for metal-sensitive analytes, comparing conventional stainless steel column hardware to hardware that incorporates hybrid surface technology to mitigate interactions with metal surfaces. Compared to the conventional columns, the hybrid surface technology columns showed greatly improved peak shape. This article is protected by copyright. All rights reserved.
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2
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El-Shahawi M, Khraibah N. Development of a highly sensitive voltametric sensor for trace determination of melamine residues in milk and water samples. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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3
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Long F, Zhang M, Yuan J, Du J, Ma A, Pan J. A simple, versatile, and automated pulse-diffusion-focusing strategy for sensitive milliliter-level-injection HILIC-MS/MS analysis of hydrophilic toxins. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122318. [PMID: 32092652 DOI: 10.1016/j.jhazmat.2020.122318] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 01/16/2020] [Accepted: 02/14/2020] [Indexed: 06/10/2023]
Abstract
The measurement of trace hydrophilic toxins in complex aqueous-rich matrices is a daunting challenge. To address this analytical bottleneck, pulse diffusion focusing (PDF), a novel sample injection technique for hydrophilic interaction chromatography-tandem mass spectrometry (HILIC-MS/MS), was developed. Theoretical and experimental investigations of the mechanism and key parameters revealed that the pulse-injection approach, assisted by solvent diffusion, efficiently solved the volume overload problem. This milliliter-level-injection HILIC-MS/MS technique was reported for the first time herein, and provided a significant enhancement in sensitivity compared to the conventional injection method, in addition to being an efficient approach to address the solvent incompatibility of off-line sample preparation and HILIC. The automated PDF-HILIC-MS/MS system was obtained by slightly modifying a commercial LC-MS/MS instrument in an easy and economical manner. The efficiency of the system was demonstrated through the detection of trace tetrodotoxin contents in plasma and urine samples. Low limits of detection (i.e., 0.65 and 2.2 ng·mL-1) were obtained using the simplified sample preparation method. The recoveries were in the range 91-113.3 % with intra-day and inter-day precisions of ≤9.6 %. Further experimental results proved the method to be versatile for various hydrophilic toxins.
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Affiliation(s)
- Fei Long
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China
| | - Mei Zhang
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China
| | - Jiahao Yuan
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China
| | - Juan Du
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China
| | - Ande Ma
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China.
| | - Jialiang Pan
- Department of Hygiene Detection Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, Guangdong, China.
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da Silva MR, Mauro Lanças F. Evaluation of ionic liquids supported on silica as a sorbent for fully automated online solid-phase extraction with LC-MS determination of sulfonamides in bovine milk samples. J Sep Sci 2018. [DOI: 10.1002/jssc.201701148] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Sensitive determination of melamine in milk and powdered infant formula samples by high-performance liquid chromatography using dabsyl chloride derivatization followed by dispersive liquid–liquid microextraction. Food Chem 2017; 221:139-146. [DOI: 10.1016/j.foodchem.2016.10.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/08/2016] [Accepted: 10/02/2016] [Indexed: 11/21/2022]
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6
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Optimization of a rapid QuEChERS sample treatment method for HILIC-MS 2 analysis of paralytic shellfish poisoning (PSP) toxins in mussels. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.07.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Figueiredo L, Santos L, Alves A. Synthesis of a Molecularly Imprinted Polymer for Melamine Analysis in Milk by HPLC with Diode Array Detection. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21506] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Leandro Figueiredo
- LEPABE - Laboratory for Process Engineering, Environment; Biotechnology and Energy; Faculdade de Engenharia da Universidade do Porto; 4200-465 Porto Portugal
| | - Lúcia Santos
- LEPABE - Laboratory for Process Engineering, Environment; Biotechnology and Energy; Faculdade de Engenharia da Universidade do Porto; 4200-465 Porto Portugal
| | - Arminda Alves
- LEPABE - Laboratory for Process Engineering, Environment; Biotechnology and Energy; Faculdade de Engenharia da Universidade do Porto; 4200-465 Porto Portugal
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8
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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]
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9
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Wang T, Zhu Y, Ma J, Xuan R, Gao H, Liang Z, Zhang L, Zhang Y. Hydrophilic solid-phase extraction of melamine with ampholine-modified hybrid organic-inorganic silica material. J Sep Sci 2014; 38:87-92. [PMID: 25330461 DOI: 10.1002/jssc.201400900] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 09/21/2014] [Accepted: 10/09/2014] [Indexed: 12/27/2022]
Abstract
In this work, an ampholine-functionalized hybrid organic-inorganic silica sorbent was successfully used to extract melamine from a milk formula sample by a hydrophilic interaction solid-phase extraction protocol. Primary factors affecting the extraction efficiency of the material such as extraction solvent, elution solvent, sample loading volume, and elution volume have been thoroughly optimized. Under the optimized hydrophilic solid-phase extraction conditions, the recoveries of melamine spiked in milk formula samples ranged from 86.2 to 101.8% with relative standard deviations of 4.1-9.4% (n = 3). The limit of detection (S/N = 3) was 0.32 μg/g. The adsorption capacity toward melamine was 30 μg of melamine per grams of sorbent. Due to its simplicity, rapidity and cost effectiveness, the newly developed hydrophilic solid-phase extraction method should provide a promising tool for daily monitoring of doped melamine in milk formula.
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Affiliation(s)
- Tingting Wang
- College of Chemical Engineering, Ningbo University of Technology, Ningbo, China
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10
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Hazra C, Adusumalli VNKB, Mahalingam V. 3,5-Dinitrobenzoic acid-capped upconverting nanocrystals for the selective detection of melamine. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7833-9. [PMID: 24742261 DOI: 10.1021/am5011089] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In this Research Article, we report for the first time the use of upconverting nanoparticles to detect melamine up to nanomolar concentration. Detection of melamine is important as it is one of the adulterant in protein rich food products due to its high nitrogen content. In this work, we have shown how the electron deficient 3,5-dinitrobenzoic acid (DNB)-coated Er/Yb-NaYF4 nanocrystals can specifically bind to electron rich melamine and alter the upconverting property of the nanocrystals. This selective binding led to the quenching of the upconversion emission from the nanocrystals. The high selectivity is verified by the addition of various analytes similar in structure with that of melamine. In addition, the selective quenching of the upconversion emission is reversible with the addition of dilute acid. This process has been repeated for more than five cycles with only a slight decrease in the sensing ability. The study was also extended to real milk samples, where the milk adulterated with melamine quenches the emission intensity of the DNB coated NaYF4:Er/Yb nanocrystals, whereas hardly any change is noted for the unadulterated milk sample. The high robustness and the sharp emission peaks make Er(3+)/Yb(3+)-doped NaYF4 nanocrystals a potential melamine sensing material over other organic fluorophores and nanocrystals possessing broad emissions.
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Affiliation(s)
- Chanchal Hazra
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Kolkata , Mohanpur Campus, West Bengal 741252, India
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11
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Zitka O, Heger Z, Kominkova M, Skalickova S, Krizkova S, Adam V, Kizek R. Preconcentration based on paramagnetic microparticles for the separation of sarcosine using hydrophilic interaction liquid chromatography coupled with coulometric detection. J Sep Sci 2014; 37:465-575. [DOI: 10.1002/jssc.201301188] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/16/2013] [Accepted: 12/18/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Ondrej Zitka
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
| | - Marketa Kominkova
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
| | - Sylvie Skalickova
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
| | - Sona Krizkova
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry; Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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12
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Zhou L, Liu X, Kang S, Zhang F, Pan C. A rapid determination method for ethylenethiourea in potato and cucumber by modified QuEChERS – High performance liquid chromatography–tandem mass spectrometry. Food Chem 2013; 138:1355-9. [DOI: 10.1016/j.foodchem.2012.11.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 04/14/2012] [Accepted: 11/08/2012] [Indexed: 11/16/2022]
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13
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Wang Q, Yin CR, Xu L. Optimization of hydrophilic interaction LC by univariate and multivariate methods and its combination with salting-out liquid-liquid extraction for the determination of antihypertensive drugs in the environmental waters. J Sep Sci 2013; 36:1007-14. [DOI: 10.1002/jssc.201200985] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Revised: 12/14/2012] [Accepted: 12/14/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Qing Wang
- Tongji School of Pharmacy; Huazhong University of Science and Technology; Wuhan P. R. China
| | - Chen-ru Yin
- Tongji School of Pharmacy; Huazhong University of Science and Technology; Wuhan P. R. China
| | - Li Xu
- Tongji School of Pharmacy; Huazhong University of Science and Technology; Wuhan P. R. China
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14
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Xu Q, Wei HP, Du S, Li HB, Ji ZP, Hu XY. Detection of subnanomolar melamine based on electrochemical accumulation coupled with enzyme colorimetric assay. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:1810-1817. [PMID: 23373873 DOI: 10.1021/jf304034e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Based on the synergetic effect of the electrochemical accumulation process and the signal amplification of enzymes, a new sensitive method has been developed for the detection of subnanomolar melamine. There are two steps involved in the sensor construction process: (1) accumulation of melamine on an electrode by cyclic voltammetric method and (2) chemical coupling of horseradish peroxidase (HRP) with the accumulated melamine through the linkage of glutaraldehyde. The coupled HRP catalyzes the oxidation of guaiacol to generate an amber-colored product. Quantitative analysis of melamine is performed by measuring the absorption intensities of the colored product. Under the optimal conditions, the method showed a wide linearity in the concentration range from 1.0 × 10(-11) to 1.0 × 10(-8) M for melamine detection. Moreover, it has been successfully applied to detect melamine in different infant formula powders and fish feed samples.
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Affiliation(s)
- Qin Xu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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15
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Hu K, Zhang Y, Liu J, Chen K, Zhao W, Zhu W, Song Z, Ye B, Zhang S. Development and application of a new 25,27-bis
(
l
-phenylalaninemethylester-N
-carbonylmethoxy)-26,28-dihydroxy-para
-tert
-butylcalix[4]arene stationary phase. J Sep Sci 2013; 36:445-53. [DOI: 10.1002/jssc.201200850] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 10/07/2012] [Accepted: 10/09/2012] [Indexed: 12/20/2022]
Affiliation(s)
- Kai Hu
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
| | - Yanhao Zhang
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
| | - Junwei Liu
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
| | - Kangkang Chen
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
| | - Wenjie Zhao
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou P. R. China
| | - Weixia Zhu
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
- Center of Technology; Henan Entry-Exit Inspection & Quarantine Bureau; Zhengzhou P. R. China
| | - Zhichao Song
- Institute of Henan Veterinary Drug Control; Zhengzhou P. R. China
| | - Baoxian Ye
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
| | - Shusheng Zhang
- College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou P. R. China
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16
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Systematic optimisation of coupled microwave-assisted extraction-solid phase extraction for the determination of pesticides in infant milk formula via LC–MS/MS. Food Chem 2012; 134:2473-80. [DOI: 10.1016/j.foodchem.2012.04.076] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 11/03/2011] [Accepted: 04/14/2012] [Indexed: 11/19/2022]
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17
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18
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New trends in fast liquid chromatography for food and environmental analysis. J Chromatogr A 2012; 1228:298-323. [DOI: 10.1016/j.chroma.2011.10.091] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 10/16/2011] [Accepted: 10/21/2011] [Indexed: 11/22/2022]
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19
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Yassine MM, Dabek-Zlotorzynska E, Celo V. Development of a hydrophilic interaction liquid chromatography-mass spectrometry method for detection and quantification of urea thermal decomposition by-products in emission from diesel engine employing selective catalytic reduction technology. J Chromatogr A 2012; 1229:208-15. [PMID: 22318005 DOI: 10.1016/j.chroma.2012.01.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 01/10/2012] [Accepted: 01/17/2012] [Indexed: 11/27/2022]
Abstract
The use of urea based selective catalytic reduction (SCR) technology for the reduction of NOx from the exhaust of diesel-powered vehicles has the potential to emit at least six thermal decomposition by-products, ammonia, and unreacted urea from the tailpipe. These compounds may include: biuret, dicyandiamine, cyanuric acid, ammelide, ammeline and melamine. In the present study, a simple, sensitive and reliable hydrophilic interaction liquid chromatography (HILIC)-electrospray ionization (ESI)/mass spectrometry (MS) method without complex sample pre-treatment was developed for identification and determination of urea decomposition by-products in diesel exhaust. Gradient separation was performed on a SeQuant ZIC-HILIC column with a highly polar zwitterionic stationary phase, and using a mobile phase consisting of acetonitrile (eluent A) and 15 mM ammonium formate (pH 6; eluent B). Detection and quantification were performed using a quadrupole ESI/MS operated simultaneously in negative and positive mode. With 10 μL injection volume, LODs for all target analytes were in the range of 0.2-3 μg/L. The method showed a good inter-day precision of retention time (RSD<0.5%) and peak area (RSD<3%). Satisfactory extraction recoveries from spiked blanks ranged between 96 and 98%. Analyses of samples collected during transient chassis dynamometer tests of a bus engine equipped with a diesel particulate filter (DPF) and urea based SCR technology showed the presence of five target analytes with cyanuric acid and ammelide the most abundant compounds in the exhaust.
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Affiliation(s)
- Mahmoud M Yassine
- Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Science and Technology Branch, Environment Canada, Ottawa, Ontario, Canada K1A 0H3
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20
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Ping H, Zhang M, Li H, Li S, Chen Q, Sun C, Zhang T. Visual detection of melamine in raw milk by label-free silver nanoparticles. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.07.009] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Chen W, Deng HH, Hong L, Wu ZQ, Wang S, Liu AL, Lin XH, Xia XH. Bare gold nanoparticles as facile and sensitive colorimetric probe for melamine detection. Analyst 2012; 137:5382-6. [DOI: 10.1039/c2an35962f] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Tan J, Li R, Jiang ZT. Determination of Melamine in Liquid Milk and Milk Powder by Titania-Based Ligand-Exchange Hydrophilic Interaction Liquid Chromatography. FOOD ANAL METHOD 2011. [DOI: 10.1007/s12161-011-9350-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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23
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Bernal J, Ares AM, Pól J, Wiedmer SK. Hydrophilic interaction liquid chromatography in food analysis. J Chromatogr A 2011; 1218:7438-52. [DOI: 10.1016/j.chroma.2011.05.004] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 05/02/2011] [Accepted: 05/03/2011] [Indexed: 12/01/2022]
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24
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Chirita RI, West C, Zubrzycki S, Finaru AL, Elfakir C. Investigations on the chromatographic behaviour of zwitterionic stationary phases used in hydrophilic interaction chromatography. J Chromatogr A 2011; 1218:5939-63. [DOI: 10.1016/j.chroma.2011.04.002] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Revised: 03/30/2011] [Accepted: 04/01/2011] [Indexed: 11/17/2022]
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25
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Jurado-Sanchez B, Ballesteros E, Gallego M. Gas chromatographic determination of N-nitrosamines, aromatic amines, and melamine in milk and dairy products using an automatic solid-phase extraction system. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:7519-7526. [PMID: 21604719 DOI: 10.1021/jf2013919] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A reliable analytical method was presented for the simultaneous determination of six N-nitrosamines, nine aromatic amines, and melamine in milk and dairy products using gas chromatography coupled with mass spectrometry. The sample treatment includes the precipitation of proteins with acetonitrile, centrifugation, solvent changeover by evaporation, and continuous solid-phase extraction for cleanup and preconcentration purposes. Samples (5 g) containing 0.15-500 ng of each amine were analyzed, and low detection limits (15-130 ng/kg) were achieved. Recoveries for milk and dairy products samples spiked with 1, 10, and 50 μg/kg ranged from 92% to 101%, with intraday and interday relative standard deviation values below 7.5%. The method was successfully applied to determine amine residues in several milk types (human breast, cow, and goat) and dairy products.
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26
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Dai X, Qian X, Gong B, Wei Y. Tetrazole-Functionalized Silica for Hydrophilic Interaction Chromatography of Polar Solutes. Chromatographia 2011. [DOI: 10.1007/s10337-011-1985-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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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]
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28
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CHAO YY, WEI YT, LEE CT, KOU HS, HUANG YL. Membrane Sampling with Microdialysis Coupled to HPLC/UV for On-line Simultaneous Determination of Melamine and Cyanuric Acid in Non-dairy Coffee Creamer. ANAL SCI 2011; 27:1025-30. [DOI: 10.2116/analsci.27.1025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yu-Ying CHAO
- Department of Public Health, College of Health Science, Kaohsiung Medical University
| | - Yu-Tzu WEI
- Department of Public Health, College of Health Science, Kaohsiung Medical University
| | - Cheuch-Ting LEE
- Department of Public Health, College of Health Science, Kaohsiung Medical University
| | - Hwang-Shang KOU
- Graduate Institute of Pharmaceutical Sciences, College of Pharmacy, Kaohsiung Medical University
| | - Yeou-Lih HUANG
- Department of Medical Laboratory Science and Biotechnology, College of Health Science, Kaohsiung Medical University
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29
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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]
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Xia J, Zhou N, Zhou C, Chen B, Wu Y, Yao S. Simultaneous determination of melamine and related compounds by hydrophilic interaction liquid chromatography-electrospray mass spectrometry. J Sep Sci 2010; 33:2688-97. [DOI: 10.1002/jssc.201000262] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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