What model of gas chromatograph is used to detect nitrogen content?
Thread Content
What model of gas chromatograph is used to detect nitrogen? Can the HC-2B trace sulfur analyzer be used?
Only analyze nitrogen? The statement is unclear; high-purity nitrogen can be analyzed using an oxygen analyzer with trace oxygen detection. For chromatography, a regular chromatographic analyzer will suffice. A sulfur chromatograph definitely cannot be used for this purpose, as it uses an FPD detector. It shows no response to nitrogen.
It would be better if the poster described the problem in more detail, so that it will be easier for others to make a judgment.
Please feel free to contact me at QQ 94007321. I need to know the detailed requirements for nitrogen analysis.
Our company is newly established; we have air-separated nitrogen, but no oxygen, nor carbon dioxide. The detectors purchased by the company include a GC-2B gas chromatograph; the trace sulfur analyzer of the HC-2B is used for detecting carbon dioxide, but there is no gas chromatograph for detecting nitrogen.
We have online micro-oxygen analyzers, but for the other components, isn’t gas chromatography required?
The nitrogen obtained through air separation generally has a purity of over 99.9%. To analyze this gas, a chromatograph designed for nitrogen analysis is not required; instead, a chromatograph used to detect the impurities present in the nitrogen is employed. These impurities include oxygen, argon, carbon dioxide, carbon monoxide, total hydrocarbons, water, and so on. Use subtraction to calculate the purity of nitrogen. Also, what does the original poster mean by using a sulfur analyzer to detect carbon dioxide?
Our company produces food-grade carbon dioxide, and the trace sulfur analyzer is used to detect carbon dioxide. How are impurities in nitrogen detected? Isn’t it gas chromatography that’s used? Gas chromatography is used in national standards.
The detection of impurities in nitrogen is carried out in accordance with the standards GBT 8979-2008 for pure nitrogen, high-purity nitrogen, and ultra-pure nitrogen. The specific testing requirements as well as the configuration requirements for chromatography are detailed in these national standards; you can consult chromatography equipment manufacturers, who will inform you on how to configure the equipment to meet your testing needs； Additionally, chromatographic analysis is highly specific; having just one chromatograph isn’t enough to analyze all the items you want to test.