抗坏血酸沉淀分离分光光度法测定合质金中钛

Determination of titanium in alloyed gold by spectrophotometry after separation with ascorbic acid precipitating agent

研究了经抗坏血酸（ＶＣ）沉淀分离金，二安替比林甲烷（ＤＡＰＭ）分光光度法测定合质金中钛的分析方法。在０５～４０ｍｏｌ／Ｌ盐酸中，钛（Ⅳ）与试剂形成黄色络合物，在波长４２０ｎｍ处表观摩尔吸光系数ε＝１４７×１０４。钛（Ⅳ）含量在０～６ｍｇ／Ｌ范围内符合比尔定律，金不干扰测定。拟定方法用于合质金中ｘ％～００ｘ％钛的测定，结果满意。

The separation of gold with ascorbic acid precipitating agent and the determination of titanium in alloyed gold by spectrophotometry of DAPM are studied.The titanium mixed with such agent as mentioned above in 0.5～4.0mol/L hydrochloric acid forms yellow complex compound,of which the Moore’s lightabsorbing coefficient at the spot of wavelength 420nm is 1.47×104 and the titanium (Ⅳ) content is within the range of 0～6mg/L which conform to Bill law.This method is used to determine x%～00x% titanium in alloyed gold,achieving satisfactory results.