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Develpoment of dimethy1 sulfied gas CRM and stability test
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2005, v.18 no.6, pp.552-558
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(2005). Develpoment of dimethy1 sulfied gas CRM and stability test. Analytical Science and Technology, 18(6), 552-558.
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Abstract
환경 대기 중에 미량 농도로 존재하는 악취 물질의 측정을 위한 ppm 수준의 다이메틸설파이드((CH3)2S) 가스 인증표준물질(CRM)을 개발하였다. 이 표준가스는 (CH3)2S의 농도 수준이 10 umol/mol이고 질소압력이 1500 psi로서, 알루미늄 실린더에 제조되었고, 3년 동안에 0.2% 수준의 안정성을 보였다. 동시에 제조된 표준가스 실린더 4병의 (CH3)2S 농도를 가스크로마토그래프-불꽃이온화검출기(GCFID) 로 비교하여 0.4% 수준의 제조 재현성과 0.25%의 중량 및 순도의 표준불확도를 확인하였다. 개발된(CH3)2S 표준가스의 인증값은 10 umol/mol 수준이었고, 순도, 혼합. 제조, 분석, 흡착성 및 안정성을 모두고려하여 결정한 인증값의 상대 확장불확도는 1.1%(95%의 신뢰수준, k=2)이었다.
- keywords
- certification of gas CRM, dimethyl sulfide, uncertainty, stability
Reference
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