摘要
利用一种新型的热解析仪／化学发光联用的仪器系统，采用Tenax—TA（2，6-二苯基对苯醚的多孔聚合物）作为空气中低浓度丁酮的吸附剂，实验发现，当从吸附剂解吸的丁酮蒸汽通过氧化钇（Y2O3）粉体表面（温度175℃）时。其催化发光强度与丁酮浓度在一定的范围内呈良好的线性关系，据此建立了热解析仪／化学发光联用技术测定空气中痕量丁酮的新方法，其线性范围为4．025～201．25mg／m^3（r=0．9978，n=10）；检出限为1．3mg／m^3，对浓度为8．05mg／m^3的丁酮蒸汽平行测定了9次，相对标准偏差为5．36％；本法耗时短、简便快速，成功实现了对丁酮的实时在线检测．
In this paper, a method based on thermal desorption/chemiluminescence was firstly applied to determine the concentration of trace butanone in the air. The effects of absorption properties of different kinds of adsorbents on butanone was studied, which found that the absorption of Tenax-TA（2, 6- diphenyl-p-phenylene oxide） on butanone was with high stability. Under the optimized conditions（the wavelength of 490 nm, the temperature of 175 ℃ and the air flow rate of 71.4 mL/min）, the linear range of CTL intensity versus concentration of butanone vapor was from 4.025 to 201.25 mg/m^3 （r=0.9978, n=10） with a detection limit of 1.34 mg/m^3. This method was of short time-consuming and performance stability, which has been successfully applied to the online determination of butanone.
出处
《漳州师范学院学报（自然科学版）》
2009年第3期73-76,共4页
Journal of ZhangZhou Teachers College（Natural Science)
