Matrix separation-determination of hexavalent chromium in soil using inductively coupled plasma mass spectrometry with He collision model
Hexavalent chromium(Cr6+)is one of the important soil pollutants,and it is of great significance to study the determination methods of low concentration hexavalent chromium in soil for soil census.Using alkaline sodium carbonate as the extractant,hexavalent chromium in soil was extracted by constant temperature water bath oscillation at 92 ℃.The extraction solution was treated by ion exchange to reduce matrix interference,and Cr6+(52Cr)in the extraction solution was determined using an inductively coupled plasma mass spectrometry with He collision mode,with72Ge as the internal standard element.The results showed that the detection limit of the method was 0.06 mg/kg.The certified reference materials were analyzed to test the method.The determined values were in good agreement with the certified values.The standard deviations(RSD)of the method were 1.16％-5.40％(n=5).The method is rapid,accurate,and suitable for the determination of low content and large batch of hexavalent chromium in soil.
inductively coupled plasma mass spectrometryhexavalent chromiummatrix separation
万方数据
维普
