| Title: | Trapping and preconcentration of volatile organic sulfur compounds in water samples by portable and battery-powered trapping device prior to gas chromatography-sulfur chemiluminescence determination |
| Author(s): | Chen Y; Li J; Hou X; Zhang X; Yin H; Zhang M; Zheng C; |
| Address: | "Chengdu Environmental Monitoring Center, Chengdu, Sichuan 610066, China. School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China. Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China. Electronic address: abinscu@scu.edu.cn" |
| DOI: | 10.1016/j.chroma.2020.460947 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "A simple, portable and battery-powered trapping device (iTrap) consisting of a purification tube, a trapping unit and a miniature air pump was developed for the pre-concentration of volatile organic sulfur compounds (VOSCs). The tested VOSCs, including methanthiol (MT), ethanethiol (ET), dimethyl sulfide (DMS), diethyl sulfide (DES) and dimethyl disulfide (DMDS), were firstly purged from water samples and then in situ pre-concentrated with the iTrap prior to their analysis by thermal desorption gas chromatography coupling with a sulfur chemiluminescence detector (TD-GC-SCD). Twenty-six adsorbents were studied to find the most suitable adsorbent for the efficient pre-concentration of VOSCs. Under optimal conditions, limits of detection of 6, 8, 6, 2 and 3 ng L(-1) were obtained for MT, ET, DMS, DES and DMDS, respectively. The precisions were better than 5.3% (relative standard deviations, RSDs). The iTrap was successfully applied for the analysis of VOSCs in Certified Reference Materials, several surface water, underground water and wastewater samples collected from Pengzhou city, Sichuan, China. Moreover, the VOSCs trapped in the iTrap were much more stable than those directly stored in water samples and the recoveries for all samples could be maintained at acceptable levels (>73%), even their preservation time as long as 8 h" |
| Keywords: | "China *Chromatography, Gas Environmental Monitoring/instrumentation/*methods Luminescence Sulfur Compounds/analysis/*isolation & purification Volatile Organic Compounds/analysis/*isolation & purification Wastewater/*chemistry In-situ trapping Sulfur chemi;" |
| Notes: | "MedlineChen, Yong Li, Jia Hou, Xiaoling Zhang, Xiaoxu Yin, Hui Zhang, Min Zheng, Chengbin eng Netherlands 2020/04/10 J Chromatogr A. 2020 May 24; 1619:460947. doi: 10.1016/j.chroma.2020.460947. Epub 2020 Feb 10" |
