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gas chromatograph
    After been balance for 20 min at 90℃, the head space gas (1 mL) was injected in a gas chromatograph. The minimum detectable quantity for acrylonitrile and styrene were 0.01 mg/L and 0.002 mg/L, the RSD were 4.4 % and 5.7 % , respectively. The present method was simple, rapid and accurate, many kinds of organic compounds did not interfere the detection.
    应用顶空气相色谱法测定水中微量丙烯腈、苯乙烯,样品在顶空并中90℃温度中气液平衡20min后,吸取顶空气体1mL进行色谱测定,丙烯腈、苯乙烯最低检出浓度分别为0.01mg/L、0.002mg/L变异系数(CV)分别为4.4%、5.7%该方法操作简便、分析速度快、且不受多种挥发性有机物干扰。
    Results Regression equation of standard curve by injecting aqueous solution into gas chromatograph directly and monitoring concentration ofperchloroethylene in water was y=-0.33+0.056x, related coefficientr=0.999 0, Content of perchloroethylene in water appears well linearity relation from 0.05μg to 0.6μg. Retention time is 9min40s. Pike form is good.
    结果 水溶液直接注入气相色谱法测定水中四氯乙烯 ,标准曲线的回归方程为y =- 0 .33+ 0 .0 5 6x,相关系数r=0 .9990 ,水中四氯乙烯含量在 0 .0 5 μg~ 0 .6μg范围内呈良好线性关系 ,保留时间为 9min40s,峰形良好。
    The high fatty acid in milk that had been methylated was analyzed by gas chromatograph methed. The results showedthat long chain fatty asid Consisting of mcre than 12 carbons was in very good linear range,whereas the Correlation coefficientswas 0.9991.The recovery rate was 89.0%~109%.
    牛奶中高级脂肪酸经甲酯化后,利用气相色谱法测定,结果表明十二碳以上的长链脂肪酸的线性范围好,相关系数为r=0.9991以上,回收率在89.0%~109%之间。
    Four main components, H2, CO, CH4 and CO2, in mixed gas samples produced by biomass gasification hydrogen production experiment in supercritical water were successfully analyzed by GC-900A gas chromatograph with Porapak-Q packed-column, argon carrier gas and TCD.
    本文采用气相色谱法,Porapak-Q型填充柱,以氩气作载气,TCD为检测器,采用面积校正归一化法,成功地分析出超临界水中生物质气化制氢实验混合气体样品中的H2、CO、CH4、CO2等4种主要组分。
    A field experiment was conducted to evaluate CH4 and N2O emissions from paddy field of agroforestry ecosystem in hilly area of South China with closed static chamber and a modified gas chromatograph(HP5890Ⅱ) in situ in the first crop season.
    采用静态箱-气相色谱法对典型华南农林复合生态系统早稻田CH4和N2O排放进行田间原位测定,探讨早稻田两种温室气体的排放规律。
    The reaction products at 483.15—533.15 K were tracked by online analysis with capillary gas chromatograph.
    在消除内外扩散影响的条件下,在线跟踪483.15~533.15K的反应产物并用毛细管柱气相色谱法测定反应体系组成随时间的变化关系。
 

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