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Outline
In the paper, the optimum test conditions are obtained through studying the determination for content of carbon and sulfur in all kinds of ferroalloy with high-frequency induction combustion-infrared method as well as emphatically discussing the effects of selecting such parameters as the compensation and comparison level, the shortest parsing time, amount of fluxing agent and weighing sample on the determination results. The results showed that the method was suitable for determining the content of carbon and sulfur in ferroalloy, the detection limits for carbon and sulfur were 0. 000 3% and 0. 000 2% respectively as well as their relative standard deviations were both less than 3% through determining the samples of ferromanganese and ferromolybdenum 11 times. The estimated values for all kinds of ferroalloy standard samples determined with this method were the same as their certified values.
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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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