DETERMINATION OF LEAD IN PLANT-TISSUES - A PITFALL DUE TO WET DIGESTION PROCEDURES IN THE PRESENCE OF SULFURIC-ACID

被引:14
作者
TEMMINGHOFF, EJM
NOVOZAMSKY, I
机构
[1] Department of Soil Science and Plant Nutrition, Agricultural University, 6703 HB Wageningen
关键词
WET DIGESTION OF PLANT TISSUE; LEAD DETERMINATION; ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; LEAD COPRECIPITATION FORMATION OF (LEAD BARIUM) SULFATE;
D O I
10.1039/an9921700023
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Two wet digestion procedures for the determination of lead in plant materials by electrothermal atomic absorption spectrometry have been evaluated. The combination of HNO3, H2O2 and HF, though leading to incomplete digestion, yielded values corresponding well with the reference or indicative values of the vegetal tissues used. The mixture of H2SO4, HNO3 and HCIO4 gave results that were too low in some instances, owing to the formation of a mixed precipitate (Pb,Ba)SO4.
引用
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页码:23 / 26
页数:4
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