Determination of methane and non methane total hydrocarbons Portable gas chromatograph

Fixed pollution source exhaust gas total hydrocarbons, methane, andNon-Methane Total Hydrocarbons (NMTHC)The determinationportablegas chromatograph

The use of gas chromatography skills in environmental monitoring has achieved good results, mainly in water environment, soil environment, and environmental monitoring. When monitoring the environment, it is necessary to ensure the reasonable use of the selected gas chromatography skills. At the same time, it is necessary to strengthen research on their use, promote the development of skills, make them more advanced, and meet the needs of environmental monitoring operations

Fixed pollution source exhaust gas total hydrocarbons, methane, andNon-Methane Total Hydrocarbons (NMTHC)The determinationportablegas chromatograph

Working Principle:

Shanghai Xuansheng Scientific Instrument Co., Ltd. adopts double column, single valve and back blowing technology to achieve one-time injection analysis of methane and non methane total hydrocarbon content. The external standard calculation method is used, and the results are accurate and reliable. The sample is sucked into the quantitative ring by the pump, and the switching valve allows the sample to enter the chromatographic column with the carrier gas. Methane and non methane hydrocarbons are separated. When methane flows out of the chromatographic column and enters the detector for detection, the switching valve allows the carrier gas to blow back into the chromatographic column, causing the hydrocarbon compounds (non methane total hydrocarbons) in the column to form a peak and blow back to the detector for detection. This instrument can achieve online multi-point monitoring according to user needs.

portableWorking principle of non methane total hydrocarbon chromatography FID+PID for VOC analyzer: Chromatography methodHydrogen flame detector detection

The portable methane non methane total hydrocarbon analyzer uses chromatography to analyze gas samples. Chromatography is a commonly used separation and analysis technique based on the distribution equilibrium of different substances between the stationary phase and the mobile phase.

Sampling and injectionSample introductionIntroduce the gas sample to be tested into the injection system through the gas path system.

Chromatographic column separationAfter the gas sample enters the chromatographic column, methane and non methane total hydrocarbons are effectively separated due to the different movement speeds of different gases in the chromatographic column.

Detector conversionThe separated gas enters the detector, commonly used detectors include thermal conductivity detectors（TCD and flame ionization detector (FID). FID has high sensitivity and good linear range for methane and non methane total hydrocarbons, and can convert gas concentration into electrical signals.

Data Collection and AnalysisThe electrical signal is recorded and analyzed through a data acquisition system, ultimately obtaining concentration data for methane and non methane total hydrocarbons.

Portable methane non methane analyzer gas chromatograph Vehicle mounted environmental monitoring chromatograph

structurefeatureadvantageCombining portability and efficiency

The portable methane non methane total hydrocarbon analyzer has the characteristics of small size, light weight, easy portability, simple operation, and high detection accuracy. These characteristics make it perform well in on-site monitoring.

portabilityThe instrument is designed to be compact, easy to carry, and can be monitored anytime and anywhere.

Efficiency:Adopting advanced chromatographic methods andFID detector ensures the accuracy and efficiency of detection results.

intelligentizationSome instruments are equipped with intelligent software that can monitor flame status in real time, automatically ignite and turn off hydrogen gas to ensure safety.

diversityThe gas source supply is diverse, and can be connected to zero air and hydrogen externally to meet different monitoring needs.