토양 중금속 검사방법 개선에 관한 연구- ICP-AES법에 의한 토양 Cd 분석의 간섭보정 -

This study was conducted to select the most accurate measurement wavelengths for Cd analysis by examining the cause and extent of interferences in the analytical values for Cd using 183 soil samples, standards, and certified soil samples. In the test for interference effects in Cd standard solution, the accuracies of measurement for the Cd standard solution and the certified reference material (CRM) with high Fe concentration were 116~385% and 110~172% at 226.5 and 214.4 nm, respectively. However, the accuracies at 228.8 nm were 92~95% and 95~98%, respectively, ﾠ ﾠ which satisfied the target value of quality control. In a dilution test for interference correction, when the 0.05 mg/L ﾠCd standard solution was diluted 100 times, interference corrections for Fe and As were observed at 214.4 and 228.8 nm, but not at 226.5 nm. These results suggest that it is necessary to revise the method for soil pollution testing with ﾠ ICP-AES analysis of soil heavy metals to obtain reliable results by compensating for the disadvantage of the interference effect of Cd. Therefore, Cd wavelengths should be revised to compensate for the shortcomings due to Cd interference effects and obtain reliable analysis results.