Full
Outline
To establish a gas chromatography-tandem mass spectrometry (GC-MS/MS) method for detecting 21 types of herbicides in drinking water based on solid phase extraction (SPE) pre-treatment technology.
A 500 ml water sample was extracted using a C18 solid phase extraction column, followed by elution with a 5 ml mixture of ethyl acetate and dichloromethane (1:1). The eluent was collected and concentrated near dryness using vacuum centrifugation, and then reconstituted with 1 ml of ethyl acetate for analysis by gas chromatography-mass spectrometry in multiple reaction monitoring (MRM) mode.
Within the concentration range of 5.0 μg/L to 200.0 μg/L, the herbicides exhibited good linearity, with correlation coefficients ranging from 0.9 954 to 0.9 998. The limits of detection (LOD) ranged from 0.11 μg/L to 1.21 μg/L, while the limits of quantification (LOQ) ranged from 0.33 μg/L to 3.64 μg/L. Precision (RSD) was found to be between 1.6% and 6.3%, and the recovery rates ranged from 74.3% to 112.7%.
This method demonstrates a wide linear range, accuracy, and reliability, making it suitable for the detection of multiple herbicides in 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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