Full
Outline
To establish a qualitative and quantitative analytical method for determination of 6 kinds of microplastics (MPs) in packaged drinking water by pyrolysis-gas chromatography-mass spectrometry.
Diatomaceous earth was used as a diluent, and cryogenic grinding technology was applied to prepare 6 kinds of solid MPs standard substances. Characteristic pyrolysis product ions corresponding to each MPs were identified using pyrolysis-gas chromatography-mass spectrometry, serving as the basis for qualitative and quantitative analysis. The established method was subsequently applied to determine MPs in commercially available packaged drinking water.
Characteristic pyrolysis product ions for the 6 kinds of MPs were successfully identified. The constructed quantitative calibration curves all exhibited good linearity, the limits of detection were 0.10–1.10 μg/L, the spiked recovery rates were 65.2%–89.5% and the relative standard deviation was less than 10%. Polystyrene, polyethylene, polyethylene terephthalate (PET), and polyvinyl chloride were detected in 8 kinds of commercially available packaged drinking water samples, with polyethylene terephthalate being the most abundant.
The pyrolysis-gas chromatography-mass spectrometry pretreatment method established in this study is simple and efficient, featuring high sensitivity and good repeatability. It is suitable for the quantitative detection of MPs in packaged drinking water
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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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