Improved gas chromatographic method for biphenyl detection in workplace air
10.20001/j.issn.2095-2619.20250815
- VernacularTitle:气相色谱法测定工作场所空气中联苯的改进
- Author:
Jiaheng HE
1
;
Weifeng RONG
;
Jiawen HU
;
Jing YUAN
;
Anping MA
;
Ruibo MENG
;
Banghua WU
Author Information
1. Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou, Guangdong 510300, China
- Publication Type:Journal Article
- Keywords:
Biphenyl;
Workplace;
Air;
Gas chromatography
- From:
China Occupational Medicine
2025;52(4):445-449
- CountryChina
- Language:Chinese
-
Abstract:
Objective To improve the national standardized method for determining biphenyl in workplace air, which was based on activated carbon tube sampling, carbon disulfide desorption, and gas chromatography, by developing a method using GDX-502 tubes for sampling, toluene for desorption, and gas chromatography. Methods Workplace air samples were collected using GDX-502 sampling tubes and desorbed with toluene, followed by determination with gas chromatography. Results The improved method demonstrated good linearity for biphenyl concentrations ranging from 0.33 to 330.00 mg/L, with a correlation coefficient of 0.999 9. The detection limit and lower limit of quantification were 0.06 and 0.21 mg/L, and the minimum detection concentration and minimum quantification concentration were 0.04 and 0.14 mg/m3 (based on 1.5 L air sample volume), respectively. The average desorption efficiency ranged from 96.6% to 101.1%. The within-run and between-run relative standard deviations were 0.6%-1.4% and 1.4%-3.3%, respectively, with 100.0% sampling efficiency. Samples remained stable for at least 14 days at room temperature. Conclusion The improved method for biphenyl detection demonstrates rapid and accurate performance, with the advantages of low detection limits and high sampling and desorption efficiency.
