痕量元素ICP-MS测定基体干扰研究及外标法应用

The Research of Trace Element ICP-MS Measure the Interference from Matrix with External Calibration

研究了以K、Na、Ca、Mg为主要基体组分时,ICP-MS测定多元素时的干扰情况,结果表明在基体<0.1%,基体对测定结果无明显干扰。ICP-MS外标法对天然地表水,地下水中土壤,水系沉积物,植物进行测定,在水样测定中,盐分<500mg/L,外标法与内标法及AAN,ICP-AES测定结果一致,土壤,水系沉积物,植物测定,当基体<0.1%外标法与内标法测定值一致。

The matrix interference of K,Na,Ca,Mg on ICP-MS were studied.When the body solution〈0.1%,the body has no apparent interference to the detections of trace elecments in the natural water on the earth s surface,the soil of groundwater,sediments of water system and the plants by ICP-MS with external calibration.Salinity〈500mg/L,and the measurements have no obvieous difference between external calibration and internal calibration in the water.