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Objective To investigate the laboratory detectioncapability of the determination of hexachlorocyclohexane pesticideresidues in plant extract concentrates of various laboratories under thegroup. Methods Using plant extract concentrate as the substrate, $\beta$ -hexachlorocyclohexane and $\delta$ -hexachlorocyclohexane was used asthe target substance, and a comparison sample was prepared by adding amatrix. After uniformity and stability verification, robust statisticalalgorithm A was used to calculate the robust mean and robust standarddeviation. The laboratory detection ability of hexachlorocyclohexanepesticide residues in plant extract concentrate was evaluated based onthe $Z$ -ratio score. Results Theuniformity and stability test results of the comparison samples meet therequirements, and the satisfaction rate of the detection of pesticideresidues in plant extract concentrate is 100%. The participatinglaboratories have good detection capabilities. Conclusion Compared withproficiency testing, inter laboratory comparisons have the advantages oflow cost and convenient organization, making them an effectivesupplement to proficiency testing activities.
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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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