Full
Outline
To establish a method for the determination of 8 kinds of trace disinfection byproducts in water by ion chromatography-tandem mass spectrometry.
After passing through a 0.22 μm hydrophilic filter, water samples were separated on an alkanol quaternary ammonium-type ion chromatography column, passed through a suppressor, and then detected by tandem quadrupole mass spectrometer, using electrospray negative ionization in multiple reaction monitoring mode, and quantifed by the internal standard method.
The 8 kinds of trace disinfection byproducts showed good linearity within their respective ranges, with correlation coefficients all great than or equal to 0.9980. The limits of detection were 0.003–0.100 ng/mL, and the limits of quantitation were 0.01–0.50 ng/mL. Under the optimized conditions, the average spiked recoveries of disinfection byproducts at different concentration levels in various matrix water samples (pure water, finished/tap water, source water and distributed/end-point water) ranged from 85% to 120% (diiodoacetic acid: 60.8%–90.6%), with relative standard deviations of 0.39%–18.80% (iodoacetic acid: 1.82%–20.20%). It was found that when different internal standards were used for quantification, the spiked recoveries of 8 kinds of disinfection byproducts in pure water met the criterion of 80%–120%, but deviations were observed in other water matrices. Therefore, the optimal internal standard for accurate detection was the homologous isotope-labeled internal standard of the compound. The method was applied to analysis real samples in Beijing, and 6 kinds of disinfection byproducts were detected, with the mass concentrations ranging from 0.10 to 46.00 ng/mL.
The method is simple, sensitive and accurate, and is suitable for the determination of disinfection byproducts in drinking water and source water, providing a rapid, simple and accurate approach for practical monitoring of disinfection byproducts in water samples.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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