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镍的分析方法有重量法,容量法,光度法,极谱法,发射光谱法等多种方法。[4]。其中光度法方法简便,速度快,可用于不锈钢中镍的快速分析。 据文献介绍:常采用在碱性介质中,有氧化剂存在时,用丁二肟作络合剂来测定镍。形成的络合物的组成,文献中记载不一致。1924年,Feigl曾以碘为氧化剂,认为形成Ni(DH)_2OHI化合物。(其中DH为丁二肟。其中镍为正四价,与丁二肟产生颜色较深,溶介度较大的化合物。亦有人认为在氧化剂存在下,镍被氧化成三价或二价。1953年等人认定其为三价。
Nickel analysis methods are gravimetric method, volumetric method, photometry, polarography, emission spectrometry and other methods. [4]. The photometric method is simple and fast, which can be used for rapid analysis of nickel in stainless steel. According to the literature introduction: Often used in alkaline medium, in the presence of oxidants, butadiene dioxime complexing agent for the determination of nickel. The composition of the formed complex is not documented in the literature. In 1924, Feigl used iodine as an oxidant, considered to form Ni (DH) _2OHI compounds. (Among them, DH is butanedioxime, in which nickel is tetravalent, with darker color and higher degree of dissolution than butadiene dioxime, it is also considered that nickel is oxidized to trivalent or divalent in the presence of oxidant. Years and others that it is trivalent.