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Outline
After the sample was completely dissolved by dilute nitric acid, the method for determining contents of impurity elements (Al, Fe and Sb) in zinc flakes with inductively coupled plasma optical emission spectrometer (ICP-OES) was established by selecting Al 167.079 nm, Fe 238.204 nm and Sb 206.833 nm as the analytical line. The results showed that the detection ranges of Al, Fe and Sb were 0.50~5.0 μg/mL, 0.05~0.50 μg/mL and 0.05~0.50 μg/mL respectively. The linear correlation coefficients of calibration curve were all over 0.999 and the detection limit of method was 0.018~0.100 μg/g. The production samples of zinc flakes were determined according to the experimental method, the relative standard deviations (RSD, n = 10) were all smaller than 5.0% and adding standard recovery was 98%~102%.
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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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