HI 환원-PbSO4용해법을 이용한 ICP와 AAS에 의한 플라스틱 중의 납 정량 방법
Determination of lead content in the plastic by ICP and AAS using HI reduction - PbSO4 dissolution method
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초록
플라스틱을 황산으로 탄화시키고 질산으로 산화 분해한 후 과잉의 황산과 질산을 증발·건조에 의해 제거한다. 이때 침전된 납화합물 (PbSO4)의 SO4-2 이온을 염산산성에서 HI에 의해 H2S로 환원하여 휘발시킨 다음 납을 용해한후 AAS와 ICP로 측정하였다. PVC-Pb 표준시료 (690∼34610㎎/㎏)를 이용하여 재현성 실험을 하였으며 예상농도에 대비하여 99.9% 이상의 정확성을 보였다. 정밀성은 AAS는 99.8%, ICP는 99.9%로 비슷하였다.
Abstract
was decomposed with nitric acid after being carbonized by sulfuric acid. Then excess sulfuric acid and nitric acid was removed by evaporating and drying. Precipitated SO4-2 ion of PbSO4 was resolved itself into H2S by HI in hydrochloric acid and was volatilized. Then Pb+2 was dissolved and was measured by AAS and ICP. The test for reproducibility using PVC-Pb standard material (690-34610mg/kg) was conducted and the accuracy was more than 99.9% compared with the estimated concentration. The precision by AAS was 99.8% and that of ICP was 99.9%.
참고문헌 (7)
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