Tenax-TA 工作场所空气中乙酐测定填充柱

工作场所空气中乙酐测定填充柱

工作场所空气中乙酐测定填充柱 详细信息：

固定相：2，6－二苯基对苯醚的多孔聚合物担体

规格：2m*3mm

材质：玻璃柱/不锈钢

粒度：60-80目

型号：Tenax

应用：GBZT 160.60-2004 工作场所空气有毒物质测定 酸酐类化合物



GBZ/T 160.60-2004 工作场所空气有毒物质测定 酸酐类化合物

本标准被GBZ/T 300.118-2017 工作场所空气有毒物质测定 第118部分：乙酸酐、马来酸酐 和邻苯二甲酸酐代替

本标准规定了监测工作场所空气中酸酐类化合物浓度的方法。

本标准适用于工作场所空气中酸酐类化合物浓度的测定。



工作场所空气中乙酐测定填充柱 测试谱图：



       滕州市浩瀚色谱仪器技术服务有限公司，对工作场所空气中乙酐的测定对象和定量方法进行改进,提高方法的适用性。方法采集在活性炭管中的乙酐易与微量水分反应,生成乙酸和乙酐混合物,经丙酮解吸后,解吸液中乙酐和乙酸经TENAX-TA柱分离,以气相色谱(FID)测定,合并换算成空气中乙酐浓度。结果乙酐低检出浓度为0.2 mg/m~3,解吸效率为92.0%~94.1%,相对标准偏差为1.8%~7.3%,加标回收率为101%。结论改进后的方法适用于工作场所空气中乙酐的测定。









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.