The use of chemical modifiers in the determination of cadmium in sewage sludge and tin in PVC by solid sampling-graphite furnace atomic absorption spectrometry

被引：35

作者：

Belarra, MA ^{[1
]}

Resano, M ^{[1
]}

Rodríguez, S ^{[1
]}

Urchaga, J ^{[1
]}

Castillo, JR ^{[1
]}

机构：

[1] Univ Zaragoza, Dept Analyt Chem, E-50009 Zaragoza, Spain

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 1999年 / 54卷 / 05期

关键词：

solid sampling; graphite furnace-atomic absorption spectrometry; chemical modifiers; Cd; Sn;

D O I：

10.1016/S0584-8547(98)00259-6

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The effects of NH4H2PO4 and Pd as chemical modifiers in SS-GFAAS are studied in the determination of Cd in sewage sludge and of Sn in PVC samples. Whereas for Cd both modifiers act equally well whether Cd is in solution or in the solid sample, the effect of Pd on tin is different. To make the Pd modifier as effective on Sn in PVC as on Sn in solution a two-step pyrolysis must be introduced into the temperature programme. It is also shown that the contribution of the application of chemical modifiers to the final imprecision of the determination is negligible compared to that introduced by the sample inhomogeneity. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：787 / 795

页数：9