scholarly journals Study design and analytical results used to evaluate a surface-water point sampler for volatile organic compounds

1999 ◽  
Author(s):  
Michael J. Halde ◽  
Gregory C. Delzer ◽  
John S. Zogorski
Keyword(s):  
Surface Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Study Design ◽  
Analytical Results ◽  
Water Point ◽  
Volatile Organic

scholarly journals Characteristics and Sources of Selected Halocarbon and Hydrocarbon Volatile Organic Compounds in Surface Water of the Han River Basin

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2568
Author(s):  
Jong Kwon Im ◽  
Sujin Kim ◽  
Young Seuk Kim ◽  
Hye Ran Noh ◽  
Young-Min Lee ◽  
...  
Keyword(s):  
Surface Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Rural Areas ◽  
Total Concentration ◽  
Average Concentration ◽  
Gas Chromatography Mass Spectrometry ◽  
Han River ◽  
Detection Frequency ◽  
Volatile Organic

Volatile organic compounds (VOCs) are ubiquitous pollutants in surface water, which is the main source of drinking water in South Korea. We investigated the behavior (concentration, distribution, and environmental risk) of eleven selected VOCs in the surface water of the Han River tributaries using purge-and-trap gas chromatography/mass spectrometry. The average concentration of VOCs was 0.29 ± 0.47 μg/L. Chloroform and trichloroethylene (TCE) were the major pollutants, accounting for approximately 64.2% and 25.6% of the total concentration, respectively, and showing that halocarbons accounted for 94%. Chloroform was positively correlated with TCE and xylenes, and TCE was positively correlated with tetrachloroethylene (PCE). No differences were observed in the temporal average concentrations of total VOCs, but the concentrations differed significantly among sub-watershed areas. The Imjin-Hantan River, Han River mainstream, and Anseong Stream watersheds had a high positive association with TCE, whereas the Bukhan and Namhan River watersheds had a strong positive link with chloroform. The contamination and detection frequency of VOCs were highest in industrial complexes, followed by urban and rural areas. Thus, point source pollution significantly contributed to VOC contamination of these tributaries. Risk quotients for most VOCs were <1, suggesting negligible risk. Considering the relatively high occurrence of VOCs and their potential ecological risks, continuous environmental monitoring and study of environmental impacts based on ecotoxicity studies of domestic aquatic species are warranted.

scholarly journals Determination of 9 kinds of volatile halogenated alkane and chlorobenzene compounds in water by gas chromatography-mass spectrometry with purge and trap method

2021 ◽  
Vol 2079 (1) ◽  
pp. 012018
Author(s):  
Yanqin Liu
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Good Precision ◽  
Purge And Trap ◽  
Efficient Detection ◽  
Relative Standard ◽  
Volatile Organic

Abstract In this study, in the face of water environmental pollution, a more simple and efficient detection method was obtained for simultaneous determination of 9 kinds of volatile halogenated alkane and chlorobenzene compounds in water by PT/GCMS. By optimizing the purge and trap conditions, the optimal experimental conditions were obtained as follows: purge time was 15 min, purge temperature was 35 °C, purge velocity was 40 mL/min, desorption time was 2 min, desorption temperature was 240 °C. The linearity of the method was good, and the correlation coefficients were all greater than 0.999. The minimum detection limit(MDL) of the method was 0.1 μg/L. The average recovery rate ranged from 85.4 %~102.1 % in surface water and drinking water with relative standard deviation (RSD) ranged from 5.3 %-9.2 % in the spiked concentration levels of 5 μg/L and 10 μg/L. This method has the advantages of simple operation, good separation effect, rapid detection, high recovery and good precision, and can simultaneously meet the requirements of 9 kinds of volatile organic compounds detection in drinking water and surface water. This work provides a new method for the detection of volatile organic compounds in water and will have great significance for the detection of water quality.

Sign in / Sign up

Export Citation Format

Share Document