Tenax-TA 工作場所空氣中乙酐測定填充柱

。結(jié)論改進后的方法適用于工作場所空氣中乙酐的測定。




Determination of acetic anhydride in the workplace air
Determination of the filling column of acetic anhydride in the workplace air Details:

Stationary phase: porous polymer support of 2,6-diphenyl-p-phenylene ether
Specification: 2m*3mm
Material: glass column / stainless steel
Particle size: 60-80 mesh
Model: Tenax
Application: GBZT 160.60-2004 Determination of toxic substances in workplace air

GBZ/T 160.60-2004 Determination of toxic substances in workplace air
This standard is determined by GBZ/T 300.118-2017 Workplace Air Toxic Substances Part 118: Acetic anhydride, maleic anhydride and phthalic anhydride
This standard specifies methods for monitoring the concentration of anhydride compounds in the air of the workplace.
This standard applies to the determination of the concentration of anhydride compounds in the workplace air.

Determination of acetic anhydride in workplace air by packed column Test spectrum:

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd. improved the determination object and quantitative method of acetic anhydride in the workplace air to improve the applicability of the method. The acetic anhydride collected in the activated carbon tube reacted with trace moisture to form a mixture of acetic acid and acetic anhydride. After desorption by acetone, the acetic anhydride and acetic acid in the desorbed solution were separated by TENAX-TA column and determined by gas chromatography (FID). Converted to the concentration of acetic anhydride in the air. Results The minimum detectable concentration of acetic anhydride was 0.2 mg/m~3, the desorption efficiency was 92.0%~94.1%, the relative standard deviation was 1.8%~7.3%, and the recoveries were 101%. Conclusion The improved method is suitable for the determination of acetic anhydride in the workplace air.