Joint determination of Arsenic and Mercury in foods by microwave digestion HG-AFS

In this paper,a method of joint determination of Arsenic and Mercury in foods by microwave digestion Hydride generation-Atomic fluorescent spectrometry was introduced.The preceding process of samples,the conditions of instrumental determination,the accuracy and precision of the method were investigated.The results showed that the best concentration of acid in sample solution was 0.72 -2.1 mol·L~(-1)when the concentration of KOH in reductive agent was 5%(W/V).The significant relation (r=0.9994 ,0.9993) between the As ,Hg concentration and fluorescence value was observed ,respectively, when the As and Hg concentration was between 0～20μg/L and 0～2μg/L ,respectively.The C.V%was between 7.71%-8.71%,the recovery was 90%-105%.