Determination of traces of silver in human scalp hair slurries by electrothermal atomic absorption spectrometry

被引：10

作者：

Bermejo-Barrera, P ^{[1
]}

Moreda-Pineiro, A ^{[1
]}

Moreda-Pineiro, J ^{[1
]}

Bermejo-Barrera, A ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Fac Chem, Dept Analyt Chem Nutr & Bromatol, Santiago De Compostela 15706, Spain

来源：

MIKROCHIMICA ACTA | 1998年 / 129卷 / 1-2期

关键词：

atomic absorption spectrometry; human scalp hair; silver; slurry sampling;

D O I：

10.1007/BF01246851

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and rapid method for the determination of traces of silver in human hair by slurry sampling and electrothermal atomic absorption spectrometry was optimized. Hair pulverization and the particle size reduction were achieved using a vibrational zirconia mill ball for 20 min. Palladium nitrate, magnesium nitrate and palladium-magnesium nitrate were investigated as chemical modifiers to thermally stabilize silver. Glycerol was used as wetting agent to stabilize the hair slurries. A limit of detection of 21.61 mu gkg(-1) was obtained for the use of palladium nitrate as best chemical modifier. The repeatibility of the overall procedure (slurry preparation and atomic absorption spectrometric determination) corresponding to eleven measurements was 14.3%. Matrix effect was significant and so, the standard addition method was used to determine silver in hair samples from healthy people. The levels found varied between 0.10 and 1.62 mg kg(-1).

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收藏

页码：71 / 76

页数：6

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