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本文采用正丁醇萃取硅钼黄于有机相中,并于有机相中添加SnCl_2,将钼黄还原成钼蓝,直接于有机相中进行钼蓝的测定,方法准确、快速、灵敏。用于锰白铜中硅的测定,取得了满意的结果,与其他方法比较结果一致。方法步骤如下:称取试样0.2000—0.5000克于50毫升小烧杯中:加入(1∶1)HCl10毫升,HNO_32毫升,盖好表皿,摇匀,在红外灯下,40—50℃(烧杯置于培养皿水浴中)溶样,待试样溶解后,用水稀至100毫升容量瓶中,摇匀,
In this paper, n-butanol was used to extract molybdenum yellow in the organic phase, and SnCl_2 was added to the organic phase to reduce the molybdenum yellow to molybdenum blue. The determination of molybdenum blue directly in the organic phase was carried out. The method was accurate, rapid and sensitive. Used in the determination of manganese white copper, obtained satisfactory results, compared with other methods the same. Method steps are as follows: Weigh the sample 0.2000-0.5000 grams in 50 ml small beaker: Add (1: 1) HCl 10 ml, HNO_32 ml, cover the table dish, shake, under the infrared light, 40-50 ℃ Placed in a Petri dish water bath) to dissolve, until the sample is dissolved, diluted with water to 100 ml volumetric flask, shake,