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硼化钛系我所新近合成的一种新材料,对硼化钛中钛的测定,国外多采用硫酸高铁铵容量法、钢铁试剂重重法、偶氮胂比色法等。但它们所需试剂多,操作手续较烦。本文是采用络合滴定法,在pH0.8～1.2范围内,预先加入过量的EDTA,用二甲酚橙作指示剂,以酒石酸钾钠作钛的掩蔽剂,硝酸铋作反滴定剂测定钛,具有较好的选择性,简便快速,结果可靠。它不仅适合于测定硼化钛中的钛含量,而且对于测定钛铁、碳化钛等中的钛含量也是可行的。 一、试剂
Titanium boride is a new material recently synthesized by our institute. The determination of titanium in titanium boride is mainly based on the volumetric method of ferric ammonium sulfate, the heavy reagent of iron and steel, and the arsenazo colorimetric method. But they require more reagents, more troublesome procedures. This article is the use of complexometric titration, in the pH range of 0.8 to 1.2, pre-added excess EDTA, with xylenol orange as an indicator, sodium potassium tartrate as a titanium masking agent, bismuth nitrate as titrant titanium , With good selectivity, simple and quick, reliable results. It is not only suitable for the determination of the titanium content in titanium boride, but also for the determination of titanium content in ferrotitanium, titanium carbide and the like. First, reagents