Determination of Arsenic in Coal with Microwave Digestion Atomic Absorption Spectrometry

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.