다이메틸다이설파이드 가스 인증표준물질 개발 및 안정성평가

Abstract

A type of dimethyl disulfide gas CRM in the ppb level was developed for the analysis of trace-level odorous gas in environmental atmosphere. The concentration of dimethyl disulfide((CH3)2S2) was 10 mol/mol level in the cylinder filled with nitrogen, 1500 psi. And the variability of the concentration for 2 yearswas about 0.14% due to the adsorption or instability of (CH3)2S2. The gas standards produced simultaneouslyin 4 bottles and examined by GC-FID were shown with 0.4%, reproducibility of preparation and 0.25%, standarduncertainty due to weighing and purity. The relative expended uncertainty of 1.1%(95% of confidence level,k=2) was assigned to the certified value of 10 mol/mol level of (CH3)2S2 after quantitative evaluation on thepurity, mixing, weighing, analysis, adsorption and stability of dimethyl sulfide gas.