Chemiluminescence of CdTe nanocrystals catalyzed by sodium hexametaphosphate and its sensitive application for determination of estrogens.
Chemiluminescence of CdTe nanocrystals catalyzed by sodium hexametaphosphate and its sensitive application for determination of estrogens.
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DOI：
10.1016/j.saa.2012.02.019
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
Lun Wang;Fei Yuan;Hongqi Chen;Bo Ling;Juan Xu
中科院分区：
文献类型：
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作者：
Lun Wang;Fei Yuan;Hongqi Chen;Bo Ling;Juan Xu
基于六偏磷酸钠催化的 CdTe NCs-KMnO4CL 反应增强，建立了一种测定雌二醇、雌三醇和雌酮的新型流动注射纳米晶体 (NCs) 化学发光 (CL) 分析方法。在水介质中合成了谷胱甘肽（GSH）封端的 CdTe 纳米晶，并选择在 555 nm 左右发射的 CdTe NCs 作为 CdTe NCs-KMnO4 化学发光（CL）系统的发光体。研究发现，六偏磷酸钠 (SHMP) 增强了 CdTe NCs-KMnO4 系统的化学发光，而雌激素在接近中性的溶液中再次增强了这些化学发光信号。使用紫外可见光谱、光致发光（PL）光谱、透射电子显微镜（TEM）和CL光谱来表征CdTe纳米粒子并研究CL反应机理。在此基础上，建立了一种测定雌激素的流动注射化学发光新方法。在最佳实验条件下，得到了3个线性关系。该方法简单、灵敏，已成功用于自来水样品中雌激素的测定。
A novel flow injection nanocrystals (NCs) chemiluminescence (CL) analysis method has been established for the determination of estradiol, estriol and estrone based on the enhancement of CdTe NCs–KMnO4CL reaction catalyzed by sodium hexametaphosphate. Glutathione (GSH)-capped CdTe nanocrystals were synthesized in aqueous medium, and the CdTe NCs emitted at around 555nm was selected as the light emitter in CdTe NCs–KMnO4chemiluminescence (CL) system. It has been found that sodium hexametaphosphate (SHMP) enhanced the CL of the CdTe NCs–KMnO4system and estrogens increased these CL signals again in near neutral solution. UV–visible spectra, photoluminescence (PL) spectra, transmission electron microscopy (TEM) and CL spectra were used to characterize CdTe nanoparticles and investigate the mechanism of the CL reaction. On the basis of the enhancement, a novel flow-injection CL method has been established for the determination of estrogens. Under the optimum experimental conditions, three linear relationships were obtained. The method described is simple, sensitive, and has been successfully utilized for the determination of estrogens in tap water samples.