微波消解氢化物原子吸收法测定煤中的砷

Determination of Arsenic in Coal with Microwave Digestion Atomic Absorption Spectrometry

提出了微波消解原子吸收法测定煤中砷的分析方法。采用在密闭容器中,用浓王水和少量氢氟酸做溶剂来消解煤,样品溶解完毕泄压后定容,用内置氢化物和耐氢氟酸装置的原子吸收仪测定砷的含量。同时考察了微波消解称样量、浓王水和少量氢氟酸用量及压力对消解效果的影响,测量结果的检出限、回收率、相对标准偏差(n=6)和样品的测定结果与国家标准方法测定的结果相一致。本法适应于煤中砷的测定。

An microwave digestion atomic absorption spectrometry analysis method for determine arsenic in coal was proposed.Adopted in the airtight container with strong aqua regia,and a small amount of hydrofluoric acid do solvent to clearing up the coal,sample dissolved after finished pressure the capacity,with a built-in hydride resistance and hydrofluoric acid device of atomic absorption meter measuring the content of arsenic.Meanwhile,the microwave digestion sample weight,aqua regia and a small amount of dispelling hydrofluoric acid dosage and pressure were inspected,and the effects of the measurement result detection limit and the recovery,relative standard deviation（n=6） and samples with the measured results of the national standard method for determining findings were consistent.This method was suitable for the determination of arsenic in coal.