固定相：2，6－二苯基對苯醚的多孔聚合物擔體

規(guī)格：2m*3mm

材質(zhì)：玻璃柱/不銹鋼
粒度：60-80目

型號：Tenax

應(yīng)用：GBZT 160.60-2004 工作場所空氣有毒物質(zhì)測定 酸酐類化合物

GBZ/T 160.60-2004 工作場所空氣有毒物質(zhì)測定 酸酐類化合物
本標準被GBZ/T 300.118-2017 工作場所空氣有毒物質(zhì)測定 第118部分：乙酸酐、馬來酸酐 和鄰苯二甲酸酐代替
本標準規(guī)定了監(jiān)測工作場所空氣中酸酐類化合物濃度的方法。
本標準適用于工作場所空氣中酸酐類化合物濃度的測定。

工作場所空氣中乙酐測定填充柱 測試譜圖：

滕州市浩瀚色譜儀器技術(shù)服務(wù)有限公司，對工作場所空氣中乙酐的測定對象和定量方法進行改進,提高方法的適用性。方法采集在活性炭管中的乙酐易與微量水分反應(yīng),生成乙酸和乙酐混合物,經(jīng)丙酮解吸后,解吸液中乙酐和乙酸經(jīng)TENAX-TA柱分離,以氣相色譜(FID)測定,合并換算成空氣中乙酐濃度。結(jié)果乙酐低檢出濃度為0.2 mg/m~3,解吸效率為92.0%~94.1%,相對標準偏差為1.8%~7.3%,加標回收率為101%。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.