| Title: | Calibration methods for VSCs measured on AS-TD-GC-SCD |
| Address: | "Water Research Centre, University of New South Wales, Sydney, 2052, Australia. xwang185@hotmail.com. School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, Jiangsu Province, China. xwang185@hotmail.com. Water Research Centre, University of New South Wales, Sydney, 2052, Australia" |
| DOI: | 10.1007/s10661-021-09690-y |
| ISSN/ISBN: | 1573-2959 (Electronic) 0167-6369 (Linking) |
| Abstract: | "Volatile sulfur compounds (VSCs) are key odorous compounds from emissions of various odour sources because they are odorous and generally have very low odour threshold values. Identification and quantification of them through air server-thermal desorber-gas chromatography-sulfur chemiluminescence detector (AS-TD-GC-SCD) become more and more popular, although VSCs can be determined by other detectors. To find a valid, practical and quick calibration method is also an important step in their analytical processes. This study compared three different sample preparation and unity sampling methods using both gas standards (with 10 VSCs balanced in pure nitrogen gas) and liquid standards of 7 VSCs. For liquid standard sample preparation, two solvents (methanol and n-pentane) were tested and their calibration results were compared. The study revealed that the three calibration methods with both manual and dynamic dilution of VSC standard gases can achieve satisfactory calibration results with nice linear regression and correlation coefficient (r(2)). The dynamic dilution and loop sampling method is recommended because of its better reliability and time-saving processing. For calibration of VSCs with liquid standards, preparing the samples using dissolved VSCs in n-pentane and analysing them using the loop sampling method achieved best calibration results. For dimethyl trisulfide (DMTS), its calibration cannot obtain as good results as other sulfur compounds even using the best performance calibration method" |
| Keywords: | "Calibration Chromatography, Gas Environmental Monitoring Luminescence Reproducibility of Results Sulfur/analysis *Sulfur Compounds/analysis *Volatile Organic Compounds/analysis Calibration method Sulfur chemiluminescence detector (SCD) Sulfur compound sta;" |
| Notes: | "MedlineWang, Xinguang Le, Minh Stuetz, Richard eng Netherlands 2021/12/15 Environ Monit Assess. 2021 Dec 14; 194(1):25. doi: 10.1007/s10661-021-09690-y" |
