高效液相色谱-电感耦合等离子体质谱法测定土壤中砷形态  

Specific determination of arsenic speciation in soil samples by HPLC-ICP-MS

作　　者：刘崴[1] 杨红霞[1] 胡俊栋[1] 李冰[1] 

机构地区：[1]国家地质实验测试中心,北京100037

出　　处：《分析试验室》2015年第5期529-532,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(41301565);中国地质大调查项目(12120113015400)资助

摘　　要：建立了HPLC-ICP-MS联用技术测定土壤中二甲基砷（DMA）,一甲基砷（MMA）,As5＋,As3＋的方法。采用Hamilton PRP-X100阴离子交换柱分离砷形态,DMA,MMA,As5＋,As3＋方法检出限（以As计）分别为0.27,0.28,0.27,0.25μg/L,可满足痕量砷形态的测定。通过对土壤样品砷形态前处理方法的优化,最终确定60℃水浴4 h为土壤砷形态分析的样品前处理方法,加标回收率为74.4%~124%,可保证样品处理过程中砷形态的稳定。对湖南6个土壤样品中砷形态进行了测定,验证了方法的可行性。A specific method has been established by using of high-performance liquid cnromatography- inductively coupled plasma mass spectrometry for determination of four arsenic species in soil samples： DMA, MMA, As5＋ and As5＋. Hamilton PRP-X100 ion exchange column was selected as separation column and the mobile phase was 0. 04 mol/L （NH4 ）2HPO4 at flow rate of 0. 8 mL/min. the detecuon limits for DMA,MMA, As5 ＋ and As3 ＋ were 0.27, 0. 28, 0. 27 and 0. 25 μg/L, respectively. Different sample preparation methods had been compared and arsenic species were bathing method was chosen finally. During the extraction process, the recoveries of spiked from 74. 4% to 124%. Six soil samples from hunan were detected using this method and inorganic arsenic was the major arsenic species

关 键 词：土壤 砷形态 高效液相色谱-电感耦合等离子体质谱法 

分 类 号：O657.63[理学—分析化学]