DUNMi-na,WANGMing-quan,CHENYan,et al.Stir Bar Sorptive Extraction-Gas Chromatography-Mass Spectrometry for Determination of Odorous Compounds[J].China Water & Wastewater,2024,40(2):131-136.
Stir Bar Sorptive Extraction-Gas Chromatography-Mass Spectrometry for Determination of Odorous Compounds
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第2期
Page:
131-136
Column:
Date of publication:
2024-01-17
- Abstract:
- This paper established the stir bar sorptive extraction-gas chromatography-mass spectrometry method for the determination of 10 kinds of odorous compounds including geosmin(GSM), 2-methylisoborneol（2-MIB）, 2,4,6-trichloroanisole（2,4,6-TCA）, 2,3,6-trichloroanisole(2,3,6-TCA）, 2,3,4-trichloroanisole（2,3,4-TCA）, 2-isopropyl-3-methoxy pyrazine（IPMP）, 2-methoxy-3-isobutyl pyrazine（IBMP）, β-cyclocitral, β-ionone and isophorone in water. The water sample was enriched for 60 min through two mixed adsorption modes: solution adsorption and headspace adsorption, and the dosage of sodium chloride in the solution was 3.0 g. After thermal desorption at the injector port, the target components were determined by gas chromatography-mass spectrometry. There was a good linear relationship between the peak area and the mass concentration of 10 odorous compounds. The correlation coefficients were all greater than 0.996, and the limits of detection were in the range of 2.0-8.0 ng/L. The method was employed to determine the water samples from a reservoir, and three kinds of odorous compounds including 2-MIB, β-cyclocitral and isophorone were detected, among which the mass concentration of 2-MIB was higher than those of the other two compounds. The standard addition test results suggested that the recoveries of reservoir water samples was in the range of 90.0%-98.3% with relative standard deviation less than or equal to 6.8% (n=6). The method is simple, efficient and environmental friendly, requires no use of organic solvents, and can quickly and accurately detect the concentration of 10 kinds of odorous compounds in water and meet their detection requirements.
Last Update:
2024-01-17