%0 Journal Article
%T Preparation Technique of S 2OF 10 Gas Standard Sample and Determination Method of the Trace S 2OF 10 in SF\-6<br>S_2OF_(10)气体标准样品制备方法和测定方法研究
%A Wang Li
%A Wang Jizong
%A <br>王立
%A 王继宗
%J 色谱
%D 1999
%I 
%X In this paper a series of methods and techniques for the S2OF10 standard sample preparation and quantitative determination are presented. They are, the preparation of S2OF10 by preparative chromatography with adsorption/thermal desorption, the standard sample of S2OF10 gas prepared by exponential dilution and the gas chromatography/flame photometric detector(GC/FPD) determination of trace S2OF10 from an SF6 sample with quantitative calibration factor. Especially, the S2OF10 gas from a used SF6 sample was directly separated and concentrated through a U-adsorbent-tube packed with 300 mg of Porasil A in a cold trap (-63 degrees C) with liquid-nitrogen and chloroform. Then it was purified by preparative-GC and to be injected into a preparative system of standard gas sample. In the meantime, the S2OF10 gas obtained was confirmed by the methods of GC/FPD, infrared spectrophotometer(IR) and gas chromatography/mass spectrometer(GC/MS) separately. The sub-ppm(by volume) level of the S2OF10 and SF6 mixture samples were prepared by use of the exponential dilution system. The GC/FPD experimental results showed that the detection linear range of S2OF10 gas concentration was 0.80 x 10(-6)-2.60 x 10(-4) (volume fraction) and the quantitative calibration factor of the S2OF10 was 0.197 based on SF6. The determination errors of quantitative calibration factor were 1.8%-20% and S2OF10 recovery of the adsorption/thermal desorption was 98.2% (n = 9) and its relative standard deviation was 6.2%. In addition, the results also showed that it is a simple and rapid method with good linearity and reproducibility.
%K preparative gas chromatography
%K gas chromatography\|mass spectrometer
%K infrared spectro\|
%K photometer
%K S
%K 2OF
%K 10
%K standard preparatior
%K quantitative calibration factor
%K adsorption\|thermal
%K desorption<br>S2OF10
%K 气体
%K 标准物质
%K 测定
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=D7F5F79B7B81B862CD24DA481F14672F&yid=B914830F5B1D1078&vid=BCA2697F357F2001&iid=94C357A881DFC066&sid=522844664D9E629A&eid=D9202C57BAB9096F&journal_id=1000-8713&journal_name=色谱&referenced_num=0&reference_num=4