Shanghai Huaai Chromatography Analysis Technology Co., Ltd
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Detection of hazardous substances acetylene, total hydrocarbons, and nitrous oxide in air separation
The online chromatograph for detecting hazardous substances in air separation meets the analysis requirements of acetylene, total hydrocarbons, and ni
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Dangerous substance detection in air separationOnline chromatograph meets the requirementsAcetylene, total hydrocarbons, nitrous oxideThe analysis requirements can also measure the content of CO and CO2.

OneDangerous substance detection in air separationAccording to the standard

GB/T 28125.1 "Determination of Hazardous Substances in Air Separation Processes Part 1: Determination of Hydrocarbons"

GB/T 14599 "Pure Oxygen, High Purity Oxygen, and Ultra Pure Oxygen"

Air separation hazardous substance detectionDetection limit of impurities by online chromatograph (ppm)

Impurity name total hydrocarbon methane ethane ethylene
Detection limit (ppm) 0.005 0.005 0.005 0.005

IIDangerous substance detection in air separationPerformance characteristics:

Fully automatic online analysis of total carbon hydrocarbons, which can continuously measure and detect the concentration of carbon compounds in the airflow, as well as measure the content of N2O, CO, CO2. All analysis results are automatically saved and uploaded to DCS after analysis.
Real time display of instrument operating status, chromatograms and results, and alarm information, etc; Automatically store data and graphs for up to 5-10 years.


Equipped with automatic injection function, PLC controls automatic switching of injection, and the injection interval can be adjusted according to actual needs; Imported ten way valve is selected, with a small volume, a maximum of 1 million operations without maintenance, low maintenance, long service life, stable operation, and reliable work. (Optional * Automatic sampling system with heating and insulation system, which can ensure no residual analysis of high boiling point substances, improve analysis accuracy and repeatability.)


The accessories are all original parts, including pipelines and six way valves, equipped with advanced carrier gas protection and gas path protection functions. In the event of a gas outage, the instrument automatically shuts down for temperature control, which can prevent the chromatographic column from being burned out in the event of a gas outage, achieving the effect of protecting the chromatographic column. At the same time, the chromatograph cannot start heating without a carrier gas, preventing operators from accidentally damaging the chromatograph.

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