Working Principle:
The environmental sample is first subjected to an online water removal device to remove its moisture, which is then adsorbed into a low-temperature cold trap and adsorption tube. The adsorption tube is then rapidly heated to 250 ℃ for analysis, and the sample is injected. The carrier gas carries the gas sample obtained by thermal analysis and enters the pre column for separation. After the target compound enters the analysis column, the valve is switched, and the carrier gas blows back the high boiling point compound from the pre column. The target compound continues to separate in the analysis column and is detected by the flame photometric detector FPD.

　　Instrument features:
Online sample enrichment, desorption, sample analysis, automatic operation;
All pipelines and components have undergone sulfur passivation treatment, and there is no adsorption of target sulfides;
Low temperature cold trap enrichment enhances the enrichment efficiency of low boiling point compounds;
Rapid heating and instant analysis of the attached sample greatly reduce analysis errors;
High sensitivity and high selectivity FPD detector, the best choice for sulfide detection;
The instrument has power on self-test function, gas cut-off protection function, automatic restart function and alarm function to ensure system safety and stability;
Using automatic electronic flow control technology (EPC) to control carrier gas, air, and hydrogen, with high precision (0.01psi), good repeatability and reproducibility;
The core components are all made of internationally renowned brands, with high reliability and long service life.

　　Application fields:
Online monitoring of environmental air or online monitoring of industrial waste gases such as scientific research, coking, gasification, papermaking, printing and dyeing, leather making, and fiber manufacturing.

Typical spectrogram