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  • P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

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

분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2004, v.17 no.5, pp.369-374
이현자 (산업자원부 기술표준원)
김상경 (산업자원부 기술표준원)
이세진 (산업자원부 기술표준원)
이현아 (산업자원부 기술표준원)

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.

keywords
Plastics, Lead, Hydroiodic acid reduction, AAS, ICP

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%.

keywords
Plastics, Lead, Hydroiodic acid reduction, AAS, ICP

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