Direct quantification of cysteine and glutathione by 1H NMR based on β-cyclodextrin modified silver nanoparticles

被引：7
作者：
Wei, Yao [1 ]
Jiang, Hua [2 ]
Deng, Pengchi [1 ]
机构：
[1] Sichuan Univ, Analyt & Testing Ctr, Chengdu 610064, Sichuan, Peoples R China
[2] Sichuan Acad Med Sci, Sichuan Prov Peoples Hosp, Chengdu 610064, Sichuan, Peoples R China
来源：
MICROCHEMICAL JOURNAL | 2021年 / 168卷
关键词：
Nuclear Magnetic Resonance; Cysteine; Glutathione; AgNPs; Chemical shift; Diffusion ordered spectrum; NMR; SPECTROSCOPY; VALIDATION; WATER; DOTS; CELL; H-1; 1D; PH;
D O I：
10.1016/j.microc.2021.106471
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Sulfhydryl-containing amino acids had a variety of biological functions. Herein, a method was simply set up to determine Cys and GSH with beta-CD AgNPs quantitatively. The chemical shifts of Cys and GSH both moved to higher field when beta-CD AgNPs were added. The reason was that the sulfhydryl groups could bind to the surface of AgNPs. In addition, the competitive effect of Cys and GSH in mixed solutions was explored via the 1H chemical shift deviation. Peaks at 3.05 ppm and 2.93 ppm were selected as characteristic signals. This method exhibited an excellent linearity in the range of Cys and GSH in 0.1-20 mM. The detection limits of Cys and GSH were 40 mu M and 14 mu M, respectively. This method was successfully used to quantitatively determine Cys and GSH in human serum and urine.
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页数：7
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