GDX-104+5Å填充柱 超纯氢中痕量O_2+Ar、N_2、CO、CH_4和CO_2测定

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超纯氢中痕量O_2+Ar、N_2、CO、CH_4和CO_2测定
超纯氢中痕量O_2+Ar、N_2、CO、CH_4和CO_2测定 详细信息：

浩瀚色谱（山东）应用技术开发有限公司用气相色谱法测定了超纯氢中痕量杂质O_2+Ar、N_2、CO、CH_4和CO_2。将TCD和FID与预浓缩技术结合,当浓缩样品量为10升时,检测灵敏度分别达到O_2+Ar为0.2ppbV、N_2为0.4ppbV、CO为0.05ppbV、CH_4为0.2ppbV和CO_2为0.3ppbV。提出用浓缩体积差值法和按峰面积法两种方法计算样品中杂质浓度,前一种方法可消除载气中杂质浓度的影响。

名称：MS5Å填充柱
规格：1m*1/8，60-80Mesh
*高使用温度：300°C
编号：20221207007
应用：氢，氧，氮，甲烷，一氧化碳的分离

名称：填充柱

型号：GDX-104

规格：3m*4mm，60-80目

*高温度：250°C

浩瀚色谱（山东）应用技术开发有限公司,研究了氧气对空气中甲烷、总烃分析时的干扰.得出,载气的纯度很高时使用GDX-502填充柱可以将甲烷峰和氧峰完全分离,甲烷和总烃和分析可不受氧峰干扰,气样中氧气浓度低于17%时氧峰可忽略,低于12.5%时氧峰消失.氢火焰离子化检测器不能检出氧气,氧峰仅为干扰峰,在一定的色谱条件下,干扰峰即氧峰和气样中的氧气浓度成正比关系.当气样中氧气浓度小于28.7%时,总烃值峰值等于甲烷测试时氧峰和各烃峰之和,当氧气浓度大于28.7%时,不能用国标气相色谱法测试总烃,总烃值应等于总烃峰值值减去该气样的氧值.

超纯氢中痕量O_2+Ar、N_2、CO、CH_4和CO_2测定测试谱图：



Trace O in ultrapure hydrogen_ 2+Ar、N_ 2、CO、CH_ 4 and CO_ 2 Determination

Trace O in ultrapure hydrogen_ 2+Ar、N_ 2、CO、CH_ 4 and CO_ 2 Determination details:




The trace impurity O in ultrapure hydrogen was determined by gas chromatography in Haohan Chromatography (Shandong) Application Technology Development Co., Ltd_ 2+Ar、N_ 2、CO、CH_ 4 and CO_ 2。 Combining TCD and FID with pre concentration technology, when the concentration sample volume is 10 liters, the detection sensitivity reaches O respectively_ 2+Ar is 0.2ppbV, N_ 2 is 0.4ppbV, CO is 0.05ppbV, CH_ 4 is 0.2ppbV and CO_ 2 is 0.3ppbV. Two methods, concentration volume difference method and peak area method, are proposed to calculate the impurity concentration in the sample. The former method can eliminate the influence of the impurity concentration in the carrier gas.





Name: MS5A packed column

Specification: 1m * 1/8, 60-80Mesh

*High service temperature: 300 ° C

No.: 20221207007

Application: separation of hydrogen, oxygen, nitrogen, methane and carbon monoxide

Name: Filled column



Model: GDX-104



Specification: 3m * 4mm, 60-80 meshes



*High temperature: 250 ° C










The interference of oxygen on the analysis of methane and total hydrocarbons in air was studied by Haohan Chromatography (Shandong) Application Technology Development Co., Ltd It is concluded that when the purity of the carrier gas is very high, the use of GDX-502 packed column can completely separate the methane peak and the oxygen peak. The methane and total hydrocarbons and analysis can not be interfered by the oxygen peak. When the oxygen concentration in the gas sample is lower than 17%, the oxygen peak can be ignored, and when it is lower than 12.5%, the oxygen peak disappears The hydrogen flame ionization detector cannot detect oxygen, and the oxygen peak is only an interference peak. Under certain chromatographic conditions, the interference peak, that is, the oxygen peak, is proportional to the oxygen concentration in the gas sample. When the oxygen concentration in the gas sample is less than 28.7%, the total hydrocarbon value peak is equal to the sum of the oxygen peak and each hydrocarbon peak in the methane test. When the oxygen concentration is greater than 28.7%, the total hydrocarbon cannot be tested by the national standard gas chromatography. The total hydrocarbon value should be equal to the total hydrocarbon peak value minus the oxygen value of the gas sample





Trace O in ultrapure hydrogen_ 2+Ar、N_ 2、CO、CH_ 4 and CO_ 2 Determination of test spectrum: