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若干含硫的有机试剂对于光度法测定铋具有广阔的前景。众所周知,硫脲光度法测定铋有较高的选择性,可惜灵敏度较低。安替比林早就用于光发法测定铋,但选择性不够。因而在实际工作中不可能获得应用。为此,文献首次报导合成了硫代二安替比林甲烷,并用作光度法测定铋的选择性试剂,此后,并相继用于光度法测定铋。本试验详细地考察了该试剂用于光发法测定的适宜条件。试验证明,试剂对铋具有较高的选择性。克分子吸光系数为1.10×10~4。并采用六偏磷酸钠为掩蔽剂,使锡、镉、钼、锑、砷、铅、锌、铁的允
Several sulfur-containing organic reagents have broad prospects for the spectrophotometric determination of bismuth. As we all know, thiourea spectrophotometry bismuth has a higher selectivity, but less sensitive. Antipyrine has long been used for the determination of bismuth by the light method, but not enough selectivity. Therefore, it is impossible to obtain the practical application. For this reason, it was first reported in the literature for the synthesis of thio-dianiliben methane, which was used as a selective reagent for the photometric determination of bismuth, and thereafter for the photometric determination of bismuth. This test examines in detail the suitable conditions for the determination of this reagent for the light method. Test proved that the reagents have a higher selectivity of bismuth. Molecular absorption coefficient of 1.10 × 10 ~ 4. And the use of sodium hexametaphosphate as a masking agent, tin, cadmium, molybdenum, antimony, arsenic, lead, zinc, iron Yun