Quantitative Determination of Total Amino Acids Based on Surface-Enhanced Raman Scattering and Ninhydrin Derivatization

被引:8
作者
Sui, Huimin [1 ]
Chen, Lei [2 ]
Han, Xiao Xia [1 ]
Zhang, Xiaolei [1 ]
Wang, Xiaolei [1 ]
Zhao, Bing [1 ]
机构
[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun, Peoples R China
[2] Jilin Normal Univ, Key Lab Preparat & Applicat Environm Friendly Mat, Minist Educ, Changchun, Peoples R China
关键词
Amino acids; ninhydrin; SERS; determination; LIQUID-CHROMATOGRAPHIC DETERMINATION; HUMAN PLASMA; SEPARATION; PAPER;
D O I
10.2116/analsci.33.53
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In the present study, we propose a simple and sensitive method for the determination of total amino acids without any separation steps. The procedure described here is based on the ninhydrin derivatization reaction with amino acids, followed by surface-enhanced Raman scattering (SERS) measurements of the producing mixtures. A good linear correlation of excess ninhydrin SERS signals and the log values of the total amino acids concentrations is obtained; the detection limit of the method is 4.3 x 10(-9) mol L-1. The derivatization reaction is reliable and the whole experimental procedure is very simple. The sensitivity of the proposed protocol allows quantitative analysis of total amino acids at picomole levels without any separation procedures. On the basis of the conventional ninhydrin reaction, we put forward a simple SERS method for determining the total amino acids concentrations with high sensitivity, which is a promising way for routine detection.
引用
收藏
页码:53 / 57
页数:5
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