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Objective The article studies the determination of ${\mathrm{{COD}}}_{\mathrm{{Mn}}}$ and ${\mathrm{{COD}}}_{\mathrm{{Cr}}}$ inwater using microwave digestion spectrophotometry. Methods Explore thisdetection method from multiple perspectives such as detection limit,precision, accuracy, linear range, analysis speed, and testing cost, andcompare it with traditional national standard methods. Results Theexperimental results show that the detection results of this method aresimilar to those of the national standard method, with a high recoveryrate of sample spiking, a lower detection limit, and a lower relativestandard deviation. Conclusion It can be seen that the method is easy and fast to operate, with good detection accuracy, high precision, wide detection range, and reduces time and material costs, reducing secondary pollution. It is suitable for the detection of different types of water bodies such as surface water, groundwater, and sewage.
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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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