分光光度法测定金属镁中微量钒  被引量:6

Determination of trace vanadium in metallic magnesium by spectrophotometry with ternary complex of V- 5-Br-PADAP- H_2O_2

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作  者:石磊 薛宁 

机构地区:[1]中国铝业股份公司郑州研究院,郑州450041

出  处:《分析试验室》2014年第8期981-983,共3页Chinese Journal of Analysis Laboratory

摘  要:研究了在不同介质中V-5-Br-PADAP—H2O2三元络合物的性质,测定了该络合物的组成为:n(V):n(5-Br—PADAP)-n(H2O2)=1:1:1,其最大吸收波长为585nm,在HN03和EDTA一柠檬酸铵介质中,络合物在pH1.4—2.4之间吸光度最大且平稳,表观摩尔吸光系数为5.43×10。。方法已用于测定金属镁中5.0×10 -4%~1.0×10 -2的钒。The nature of ternary complex of V--5-Br-PADAP--H2O2 in different media was studied m tlals paper, V reacts with 5-Br-PADAP and H2 O2 to form a ternary complex, whose component ratio is n (V) : n (5-Br- PADAP) : n( H202 ) = 1: 1:1 and the maximum absorption wavelength is 585 nm. Under the condition of pH 1.4 ~ 2. 4 in nitrate and EDTA-ammonium citrate medium, the complex has the maximum absorbance, the apparent molar absorption coefficient is 5.43 × 104. This analytical vanadium in magnesium in the rang of 5.0 × 10 -4 _ 1.0 × 10 method could be applied to the determination of vanadium in magnesium in the rang of 5.0 ×10 -4 _ 1.0 × 10 -2%.

关 键 词:5-Br—PADAP 金属镁 分光光度法  

分 类 号:O657.3[理学—分析化学]

 

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