钼-邻苯二酚紫多元配合物协同增敏显色的研究  

Study on Synergistic Sensibilization Color Reaction of Multivariate Complex of Molybdenum Pyrocatechol Violet

作　　者：陈昭国[1] 陈曦 

机构地区：[1]湖北工学院化工系 [2]中国船舶总公司701所

出　　处：《岩矿测试》1999年第1期50-52,共3页Rock and Mineral Analysis

摘　　要：研究了在ｐＨ４～６的弱酸性介质中，羟胺（ＨＹ）和溴化十二烷基吡啶（ＤＰＢ）在钼、邻苯二酚紫（ＰＶ）配合物中的增敏作用和显色条件。有色配合物的最大吸收峰为７１８ｎｍ，表观摩尔吸光系数达１．２×１０６Ｌ·ｍｏｌ－１·ｃｍ－１，钼的检出限为０．６μｇ／Ｌ，反应在室温下瞬间完成，方法的线性范围在０．８～１００μｇ／ＬＭｏ，对ｗ（Ｍｏ）在１０－３水平的试样测定４次，ＲＳＤ为４．６％～６．２％。对企业标准钢样的测定结果与推荐值相符。Synergistic sensibilization effect of hydroxylamine (HY) dodecy pyridine bromide(DPB) on color reaction of multi component complex of molybdenum pyrocatechol violet (PV) in a weak acid medium and the conditions for the chromogenic reaction are studied. The speed of the chromogenic reaction was fast and the maximum absorbance is at 718 nm with apparent molar absorption of 1.2×10 6 L·mol -1 ·cm -1 . Beer's law is obeyed in the concentration range of 0.8～100 μg/L for Mo with detection limit of 0.6 μg/L. Precision is 4.6%～6.2% RSD ( n =4) at w (Mo) =10 -3 level. The method has been applied to the determination of trace Mo in steel standard samples and results are in good agreement with recommended values.

关 键 词：钼 邻苯二酚紫 羟胺 多元配合物 显色 增敏作用 

分 类 号：O614.612[理学—无机化学]