摘要
采用离子色谱氢化物发生原子荧光联用法（IC-HGAP3）测定四种砷形态，并优化了各种实验参数。整套分析系统的最小检出量为As（Ⅲ）0．020ng，MMA 0．045ng，DMA 0．043ng，As（V）0．166ng，相对标准偏差（n=6）小于3％，在10～200ng／mL的浓度范围内线性关系均大于0．999。用此方法测量地下水的4种砷形态加和的总量与用HG-AFS测得的总砷值相一致，表明本方法切实可行。本系统结构简单、稳定性好，非常适合用于检测砷形态。
The determination of arsenite monomethylarsonic （MMA） and dimethylarsinic acid （DMA） was performed with ion chromatography-hydride generation-atomic fluorescence spectrometry （IC-HG-AFS）. Various experimental parameters were optimized, such as parameters of chromatography, hydride generation and atomic fluorescence spectrometry. With a sample loading volume of 20 microliter, the treasurable minimum for As （m）, DMA, MMA and As （V） were 0.02ng, 0.045ng; 0.043ng,0.166ng, respectively, and relative standard deviations were less than 3%（n=6）. Correlation coefficients were greater than 0.999 in the range of 10-200ng/mL. The present procedure was applied for the speciation of arsenic in underground water, and the sum of the four arsenic species by IC-HG -AFS was in good agreement with the total value by HG-AFS. This simple system is very suitable for the detection of arsenic species.
出处
《现代仪器》
2006年第4期31-34,共4页
Modern Instruments
关键词
新气液分离系统
砷形态
离子色谱
氢化物发生原子荧光
New gas-liquid separator Arsenic speciation Ion chromatography Hydride generation-atomic fluorescence spectrometry
