Citation: ZHOU Kao-Wen, XU Ji-Chao, GU Chun-Xiu, LIU Bai-Ning, Ren Hui-Rong. Simultaneous Determination of Formaldehyde, Benzene and Sulfur Dioxide In Air by Cataluminescence[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(6): 898-905. doi: 10.11895/j.issn.0253-3820.160912 shu

Simultaneous Determination of Formaldehyde, Benzene and Sulfur Dioxide In Air by Cataluminescence

ZHOU Kao-Wen ^1,2, ,
XU Ji-Chao ³ ,
GU Chun-Xiu ^1,2 ,
LIU Bai-Ning ^1,2 ,
Ren Hui-Rong ¹

1.
College of Biochemical Engineering, Beijing Union University, Beijing 100023 China;
2.
Beijing Key Laboratory of Biomass Waste Resoure Utilization, Beijing 100023, China;
3.
Qingdao Institute for Food and Drug control, Qingdao 266071, China

Received Date: 20 December 2016
Revised Date: 23 March 2017

Fund Project: 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.

A novel method based on cross sensitivity of cataluminescence (CTL) on nano-Ti₃CeY₂O₁₁ 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 is 130 mL/min. The detection limits (3σ) are 0.04 mg/m³ for formaldehyde, 0.05 mg/m³ for benzene and 0.10 mg/m³ 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.
- Formaldehyde,
- Benzene,
- Sulfur dioxide,
- Cataluminescence,
- Gas sensor
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