Determination of Total Arsenic and Arsenic Metabolites in Human Liver Hepatocytes
The effects of direct sampling and three digestion methods were investigated on the determination of arsenic in Chang liver hepatocytes after ultrasonic disintegration were investigated.The results showed that the efficiency of microwave digestion and obturator digestion was better than cold digestion and direct sampling.The day precision(present as RSD) of microwave digestion and obturator digestion were 2.1% and 1.2%,the inter-day precision were 1.2% and 2.0%,respectively.The spike recovery for the total As in the sample is 95.7%-108.1%.The As detection limits with these four sample treatment methods(including direct sampling) were 0.74-0.93 μg/L.In addition,arsenic speciation in Chang liver hepatocytes was also analyzed using the hyphenated technique of high performance liquid chromatography coupled with inductively coupled plasma-mass spectrometry.The experimental results indicated that dimethylarsinic acid(DMA) and an intermediate metabolite of DMA were found in Chang liver hepatocytes besides inorganic arsenic(As(Ⅲ) and As(Ⅴ)).