1
|
Kong Y, Yang G, Kong L, Hou Z, Yang G, Li H, Ji X, Gao M. New Application of pH-Mediated Acid Stacking Technique for Amphoteric Compounds in Capillary Electrophoresis: Example Assay of Blood Glutathiones. J Chromatogr Sci 2017; 55:477-483. [PMID: 28039154 DOI: 10.1093/chromsci/bmw205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 12/14/2016] [Indexed: 11/14/2022]
Abstract
Both reduced and oxidized forms of glutathiones were firstly stacked and detected using pH-mediated acid stacking method, in which glutathiones were stacked as cations and separated as anions. Factors, such as injection time, sweeping time, buffer pH, concentration of sodium chloride in sample matrix, that influenced stacking and separation were systematically studied and optimized. Under the optimum condition, the enhancement factors of ~20 times for both reduced and oxidized forms of glutathiones could be easily obtained within 20 min with satisfied sensitivities (limit of detections were 0.12 and 0.06 μmol/L for reduced and oxidized glutathione, respectively, at signal-to-noise ratio, S/N = 3), linearity range (0.3-300.0 and 0.6-300.0 μmol/L for reduced and oxidized glutathione, respectively), recoveries (>98%) and reproducibilities (relative standard deviation <5.1% for peak height). The proposed method provides an alternation way for assaying of glutathiones, as well as amphoteric compounds, in blood sample.
Collapse
Affiliation(s)
- Yu Kong
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Guifang Yang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Linghong Kong
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Zhanwu Hou
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Guifang Yang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Hua Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Xiaoying Ji
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| | - Meili Gao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biological Science and Engineering, School of Life Science and Technology, Institute of Mitochondrial Biology and Medicine,Xi'an Jiao Tong University, Xi'an, Shaanxi 710049, PR China
| |
Collapse
|
3
|
Affiliation(s)
- Rachel K Harstad
- University of Minnesota , Department of Chemistry, 207 Pleasant Street South East, Minneapolis, Minnesota 55455, United States
| | - Alexander C Johnson
- University of Minnesota , Department of Chemistry, 207 Pleasant Street South East, Minneapolis, Minnesota 55455, United States
| | - Megan M Weisenberger
- University of Minnesota , Department of Chemistry, 207 Pleasant Street South East, Minneapolis, Minnesota 55455, United States
| | - Michael T Bowser
- University of Minnesota , Department of Chemistry, 207 Pleasant Street South East, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
4
|
Demirhan BE, Demirhan B, Kara HS. Room-temperature phosphorescence determination of melamine in dairy products using l-cysteine-capped Mn-doped zinc sulfide (ZnS) quantum dots. J Dairy Sci 2015; 98:2992-3000. [DOI: 10.3168/jds.2014-9221] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/30/2015] [Indexed: 11/19/2022]
|
6
|
Malá Z, Šlampová A, Křivánková L, Gebauer P, Boček P. Contemporary sample stacking in analytical electrophoresis. Electrophoresis 2014; 36:15-35. [DOI: 10.1002/elps.201400313] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/05/2014] [Accepted: 08/05/2014] [Indexed: 12/14/2022]
Affiliation(s)
- Zdena Malá
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Andrea Šlampová
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Ludmila Křivánková
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Petr Gebauer
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Petr Boček
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
| |
Collapse
|
7
|
Ji YL, Chen XW, Zhang ZB, Li J, Xie TY. Efficient sample clean-up and online preconcentration for sensitive determination of melamine in milk samples by capillary electrophoresis with contactless conductivity detection. J Sep Sci 2014; 37:3000-6. [DOI: 10.1002/jssc.201400360] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 07/15/2014] [Accepted: 07/18/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Yan-ling Ji
- School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou China
| | - Xiao-wei Chen
- School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou China
| | - Zhu-bao Zhang
- School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou China
| | - Jing Li
- School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou China
| | - Tian-yao Xie
- School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou China
| |
Collapse
|
8
|
Kong Y, Wei C, Hou Z, Wang Z, Yuan J, Yu J, Zhao Y, Tang Y, Gao M. Stacking and analysis of melamine in milk products with acetonitrile-salt stacking technique in capillary electrophoresis. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2014; 2014:212697. [PMID: 25197612 PMCID: PMC4150491 DOI: 10.1155/2014/212697] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 07/22/2014] [Indexed: 06/03/2023]
Abstract
Melamine was measured in real milk products with capillary electrophoresis (CE) based on acetonitrile-salt stacking (ASS) method. Real milk samples were deproteinized with acetonitrile at a final concentration of 60% (v/v) and then injected hydrodynamically at 50 mBar for 40.0 s. The optimized buffer contains 80.0 mmol/L pH 2.8 phosphates. Melamine could be detected within 20.0 min at +10 kV with a low limit of detection (LOD) of 0.03 μmol/L. Satisfactory reproducibility (inter- and intraday RSD% both for migration time and peak area was lower than 5.0%) and a wide linearity range of 0.05 μmol/L ~ 10.0 μmol/L were achieved. The proposed method was suitable for routine assay of MEL in real milk samples that was subjected to a simple treatment step.
Collapse
Affiliation(s)
- Yu Kong
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Chong Wei
- Department of Criminal and Inspectoral, Public Security Bureau of Han Zhong City, Shaanxi, China
| | - Zhanwu Hou
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zilong Wang
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jiaqiang Yuan
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jiang Yu
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yongxi Zhao
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yuhai Tang
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Meili Gao
- Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Bioengineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| |
Collapse
|
9
|
Liu B, Cong Y, Ivory CF. Counterflow isotachophoresis in a monolithic column. J Sep Sci 2014; 37:2395-402. [DOI: 10.1002/jssc.201400392] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 06/06/2014] [Accepted: 06/06/2014] [Indexed: 12/29/2022]
Affiliation(s)
- Bingwen Liu
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA USA
| | - Yongzheng Cong
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA USA
| | - Cornelius F. Ivory
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA USA
| |
Collapse
|