Determination of Arsenic Species in Underground Water by Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry

作者：Jia Na; Han Mei; Zhao Guoxing; Zhang Lin^*; Liu Bingbing; Li Yi

来源：Asian Journal of Chemistry, 2014, 26(16): 5271-5274.

DOI：10.14233/ajchem.2014.17043

• Capillary electrophoresis
• Inductively coupled plasma mass spectrometry (ICP-MS)
• Speciation analysis
• Arsenic

A method for the detection of trace As(III), As(V), monomethylarsonic acid, dimethylarsinic acid in underground water by capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS) was developed. The optimized conditions of capillary electrophoresis including pH and concentration of the buffer, separation voltage and injection time were studied. The results showed that the above four species of arsenic were baseline separated within 9 min under the optimized conditions. The detection limits (S/N = 3) of As(III), As(V), dimethylarsinic acid, monomethylarsonic acid were 0.25-0.53 mu g/L and the RSD (n = 10) of the peak areas were smaller than 5 %. The method has been successfully applied to the determination of the species of arsenic in groundwater samples. The recoveries were 91-107 %. The method can be used for the speciation analysis of arsenic in real groundwater samples. The result indicated that As(III) and As(V) as the main arsenic speciations existed in groundwater of Nei Mongolia.

• 出版日期2014-8
• 单位中国地质科学院水文地质环境地质研究所