气相色谱法测定黄磷生产尾气中的CO_2

Determination of CO_2 in Yellow Phosphorus Tail Gas by Gas Chromatography

针对黄磷生产尾气具有强化学活性和腐蚀性的特点，选择了TDX—01型碳分子筛色谱柱，采用气相色谱法测定黄磷尾气中的CO2。实验结果表明：黄磷尾气中高浓度的CO2用TCD检测器检测，CO2体积分数在0．1％～10％时，检测下限可达到0．05％，方法的平均回收率为93．6％～104．1％，相对标准偏差为2．1％～3．2％；净化后黄磷尾气中的微量CO2经Ni催化甲烷化转化后用FID检测器测定，CO2体积分数在1．0×10^-7～1．0×10^-4时，方法的检测下限可达到5．0×10^-8，相对标准偏差为1．63％。

Because of the strong chemical activity and causticity of yellow phosphorus tail gas, CO2 in yellow phosphorus tail gas was determined by gas chromatography with TDX-01 carbon molecular sieve chromatographic column. The experimental results show that： CO2 with high concentration （0.1% - 10% of CO2 volume fraction） in the yellow phosphorus tail gas can be determined by TCD （ thermal conductivity detector）, and the detection limit of the method is 0.05%, the average recovery is 93. 6% - 104.4%, the relative standard deviation is 2.1% - 3.2% ; The trace CO2 （ with 0.1 × 10^-6 ～1.0 × 10^-4 of CO2 volume fraction） in the treated yellow phosphorus tail gas can be determined by FID （flam ionization detector） after Ni-catalytically transformed to methane, and the detection limit of the method is 0.05× 10^-6, the relative standard deviation is 1.63%.