DETERMINATION OF CADMIUM IN BIOLOGICAL-MATERIALS BY TUNGSTEN COIL ATOMIC-ABSORPTION SPECTROMETRY

被引：47

作者：

GINE, MF

KRUG, FJ

SASS, VA

REIS, BF

NOBREGA, JA

BERNDT, H

机构：

[1] UNIV SAO PAULO,INST QUIM,BR-01498 SAO PAULO,BRAZIL

[2] INST SPEKTROCHEM & ANGEW SPEKTROSKOPIE,W-4600 DORTMUND,GERMANY

[3] UNIV FED SAO CARLOS,DEPT QUIM,BR-13560 SAO CARLOS,SP,BRAZIL

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 1993年 / 8卷 / 02期

关键词：

ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; TUNGSTEN COIL ATOMIZER; CADMIUM DETERMINATION; BIOLOGICAL MATERIAL;

D O I：

10.1039/ja9930800243

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple, low cost tungsten coil furnace was evaluated for electrothermal atomic absorption spectrometry (ETAAS). The open atomizer was resistively heated by using a power supply with a voltage feedback circuit. The analysis time using a manually injected sample volume of 10 mul was 41 s. Acceptable precision (relative standard deviation <3%, n = 12 at 1.0 ng ml-1 of cadmium) was obtained for cadmium values ranging from 0.5 to 6.0 ng ml-1. The characteristic mass for peak height absorbance was 0.5 pg. Results compare well with certified values of different biological materials digested with nitric acid. For certain reference materials better accuracy was obtained from data based on integrated absorbance.

引用

页码：243 / 245

页数：3