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Outline
Objective Analyze and summarize the factors and precautions that affect the use of N, N-diethylphenylenediamine spectrophotometry for the determination of sulfides in water through experimental analysis. Methods N,N-diethyl-p-phenylenediamine spectrophotometry was used for the determination of sulfide in water. The accuracy and precision of the method were verified by the standard samples with known sulfide content, and all aspects of the experiment were analyzed. Result The N,N-diethyl-p-phenylenediamine spectrophotometry method for the determination of sulfides in water meets the analytical requirements in terms of linearity, precision, and accuracy, making it suitable for the detection of sulfides in clean water. Conclusion When doing the experiment, attention should be paid to sampling, preparation and absorption of standard solutions, and preparation of colorimetric solutions etc. in order to achieve satisfactory results.
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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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