文献类型：期刊文献

中文题名：催化发光法同时测定空气中的甲醛、苯和二氧化硫

英文题名：Simultaneous Determination of Formaldehyde,Benzene and Sulfur Dioxide In Air by Cataluminescence

作者：周考文[1,2];徐吉超[3];谷春秀[1,2];刘白宁[1,2];任慧荣[1]

第一作者：周考文

通讯作者：Zhou, KW[1];Zhou, KW[2]

机构：[1]北京联合大学生物化学工程学院;[2]生物质废弃物资源化利用北京市重点实验室;[3]青岛市食品药品检验研究院

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China;[2]corresponding author), Beijing Key Lab Biomass Waste Resoure Utilizat, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2017

卷号：45

期号：6

起止页码：898-905

中文期刊名：分析化学

外文期刊名：Chinese Journal of Analytical Chemistry

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000427854100013)】；北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：This work was supported by Beijing Municipal Natural Science Foundation (CN) ( No. 2152013), the National High Technology Research and Development Program of China (No. 2014AA022002), Key Projects of Science and Technology Plan from Beijing Municipal Education Commission (CN) ( No. kz201311417038) and Raise Level of Scientific Research Funds from BUU

语种：中文

中文关键词：甲醛;苯;二氧化硫;催化发光;气体传感器

外文关键词：Formaldehyde;;Benzene;;Sulfur dioxide;;Cataluminescence;;Gas sensor

摘要：基于甲醛、苯和二氧化硫在纳米Ti_3Ce Y_2O_(11)上的催化发光有交叉敏感现象,在3个波长处分别确定甲醛、苯和二氧化硫浓度与催化发光信号强度的响应关系,再依据发光信号强度的叠加性特征即可获取甲醛、苯和二氧化硫的准确浓度,据此建立了同时测定空气中甲醛、苯和二氧化硫的新方法。3个分析波长分别为420、535和680 nm,敏感材料表面温度为280℃,载气流速为130 m L/min。本方法对甲醛、苯和二氧化硫的检出限(3σ)分别为0.04、0.05和0.10 mg/m3,线性范围分别为0.08~75.60 mg/m^3、0.10~101.40 mg/m^3和0.30~115.00 mg/m^3,回收率分别为96.4%~103.7%、97.8%~102.5%和97.2%~103.3%。常见共存物,如乙醛、甲苯、硫化氢、氨、甲醇、乙醇和二氧化碳等不干扰测定。连续200 h通浓度均为50 mg/m3的甲醛、苯和二氧化硫混合气体,发光强度的相对偏差≤2%,表明此纳米级复合氧化物对甲醛、苯和二氧化硫的敏感性的寿命长。本方法充分利用了交叉敏感现象,可以实现空气中甲醛、苯和二氧化硫的在线分析。
A novel method based on cross sensitivity of cataluminescence( CTL) on nano-Ti_3 Ce Y_2O_(11)was proposed for simultaneous determination of formaldehyde,benzene and sulfur dioxide in air. The relations between the concentrations of formaldehyde,benzene and sulfur dioxide and their CTL intensities were respectively ascertained at three wavelengths. The accurate concentrations of formaldehyde,benzene and sulfur dioxide can be calculated by superimposed total CTL intensities. The three analysis wavelengths are 420 nm,535 nm and 680 nm. The surface temperature of the sensitive materials is 280℃. The carrier gas flow rate is130 m L/min. The detection limits( 3σ) are 0.04 mg/m^3 for formaldehyde,0.05 mg/m^3 for benzene and 0.10mg/m^3 for sulfur dioxide,respectively. The linear ranges of CTL intensity versus analyte concentration are 0.08-75.60 mg/m3 for formaldehyde,0.1-101.40 mg/m3 for benzene and 0.3 to 115.00 mg/m3 for sulfur dioxide.The recoveries of 12 testing standard samples by this method are 96.4%-103.7% for formaldehyde,97.8%-102. 5% for benzene and 97. 2%-103. 3% for sulfur dioxide. Common coexisting substances,such as acetaldehyde,toluene,hydrogen sulfide,ammonia,methanol,ethanol and carbon dioxide,do not disturb the determination. The relative deviation of CTL signals of continuous 200 h detection for gaseous mixture containing formaldehyde,benzene and sulfur dioxide is less than 2%,which shows the longevity of the nanometer composite oxide to formaldehyde,benzene and sulfur dioxide. This method makes full use of the cross sensitive phenomenon,and can realize the on-line analysis of formaldehyde,benzene and sulfur dioxide in air.