Determination of formaldehyde based on the enhancement of the chemiluminescence produced by CdTe quantum dots and hydrogen peroxide

被引：26
作者：
Han, Suqin [1 ]
Wang, Jianbo [2 ]
Jia, Shize [1 ]
机构：
[1] Shanxi Normal Univ, Sch Chem & Mat Sci, Linfen 041004, Shanxi, Peoples R China
[2] Shanxi Normal Univ, Editorial Dept Journal, Linfen 041004, Shanxi, Peoples R China
来源：
MICROCHIMICA ACTA | 2014年 / 181卷 / 1-2期
关键词：
Chemiluminescence; CdTe QDs; Formaldehyde; TRACE AMOUNTS; FOOD SAMPLES; DERIVATIZATION; NANOCRYSTALS; WATER; REAGENT; SENSOR; PHASE;
D O I：
10.1007/s00604-013-1083-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Water-soluble cadmium telluride quantum dots (CdTe QDs) capped with glutathione (GSH) display chemiluminescence (CL) emission on reaction with hydrogen peroxide (H2O2) in strongly alkaline medium. It is found that the CL is strongly enhanced on addition of formaldehyde in aqueous solution. A flow injection system was developed, and it is shown that there is good linearity between CL intensity and the concentration of formaldehyde in the 0.06-3.0 mu g L-1 range. The limit of detection is as low as 10 ng L-1. The method was successfully applied to the determination of formaldehyde in indoor air after adsorption into an aqueous phase. The recoveries for the real samples range from 97 % to 102.5 %, and the relative standard deviation is < 3.8 % for intra- and inter-assay precision.
引用
收藏
页码：147 / 153
页数：7
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