摘要
采用Agilent公司的微板流路控制技术中心切割装置,建立了一种简便测定苯乙烯中微量苯含量的二维气相色谱分析方法,并与ASTMD6229—06标准方法的阀切换技术进行了比较,两者定量分析结果具有较好的一致性。测定苯含量为0.21～82.20mg/kg的苯乙烯试样时,微板流路控制系统和阀切换系统这两种方法的苯校正曲线相关系数r2分别为0.9991,0.9986,线性关系良好;标样回收率分别为95.9%～110.5%和98.9%～119.5%,5次测定的相对标准偏差均小于3.4%,两种分析方法的精密度良好。微板流路控制系统色谱柱和气路系统连接简便且死体积小,可部分代替传统的阀切割技术,具有良好的应用前景。
A novel two-dimensional gas chromatography, which was used in determination of trace benzene in styrene, was established by the capillary flow technique （Deans Switch） and compared with ASTM D6229--06 standard test method. The analytical results obtained by the method were in agreement with the values obtained by ASTM D6229--4）6. A series of standard samples were analyzed to quantitatively evaluate the accuracies and precisions of the two methods. The linearity test showed that correlation coefficient r2 values of benzene calibration curves of capillary flow technique and ASTM D6229--06 standard test method were 0. 999 1 and 0. 998 6 respectively when benzene content was in the range of 0.21 - 82.20 mg/kg. And recoveries of the standard samples were in the ranges of 95.9% - 110.5% and 98.9% - 119.5%, respectively. Relative standard deviations of five tests were all within 3.4%. Compared with the ASTM D6229-06 method, the capillary flow technique is simple and easy to operate.
出处
《石油化工》
CAS
CSCD
北大核心
2010年第3期331-335,共5页
Petrochemical Technology
关键词
微板流路控制技术
阀切换技术
苯乙烯
苯
气相色谱分析
capillary flow technique
valve-switching technique
styrene
benzene
gas chromatography
