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一方法简介试样以磷酸-硫酸-硫酸铵混合液分解后,在草酸介质中,以氢氧化钠沉淀分离铁、锰等元素。在盐酸介质中以三氯化钛作还原剂,使钨(Ⅵ)还原为(Ⅴ)并与硫氰酸盐生成稳定的黄色络合物,于405nm波长处测吸光度。采用湖南省冶金研究所与新安江分析仪器厂共同研制的82型全差示光度计测量,测量精度较高,且范围有显著的扩展。体系中的盐酸浓度为
A brief introduction of the method Sample with phosphoric acid - sulfuric acid - ammonium sulfate mixture of decomposition, in the oxalic acid medium, with sodium hydroxide precipitation iron, manganese and other elements. In hydrochloric acid medium with titanium trichloride as a reducing agent, the tungsten (Ⅵ) reduced to (Ⅴ) and with thiocyanate to generate a stable yellow complex, measured absorbance at 405nm wavelength. Using the Hunan Academy of Metallurgy and Xin’anjiang Analytical Instrument Factory jointly developed by 82 full differential spectrophotometer measurement accuracy higher, and the scope of a significant expansion. The concentration of hydrochloric acid in the system is