钼－邻硝基苯基荧光酮－CPB显色反应的研究与应用  

Study on the Colour Reaction of Molybdenum with o-Nitrophenylfluoroneand Cetyl Pyridine Bromide and Its Application

作　　者：陈同森[1] 陈展光[1] 徐芬[1] 高占荣 

机构地区：[1]湖南大学化学化工系

出　　处：《冶金分析》1994年第4期31-33,共3页Metallurgical Analysis

摘　　要：本文研究了邻硝基苯基荧光酮（ｏ－ＮＰＦ）胶束分光光度法测定钼的显色反应条件。在ＣＰＢ存在下于强酸介质中，Ｍｏ（Ⅵ）与ｏ－ＮＰＦ形成１：２的桔红色配合物，λｍａｘ在５３１ｎｍ处，ε５３１值达１．６３×１０￣５。钼量在０～８．０μｇ／２５ｍｌ范围内符合比尔定律。方法有良好的选择性和稳定性，用于合金钢中钼直接测定，结果满意。A highly sensitive colour reaction of molybdenum with o-nitrophenylfluorone （o-NPF） and cetyl pyridinebromids （CPB） has been studied. In the presence of CPB and in the 0.3 - 0.6 mol／L HCl medium. Mo （Ⅵ） reacts witho-NPF to form 1 : 2 orange-red complex. The apparent molar absorptivity of the complex is 1.63 ×10~5 at 531nmBeer＇s law is obeyed in the range of o to 8.0μg／25ml This method has a good selectivity and stability. It has been used tothe direct determination of molybdenum in alloy steel with satisfactory results.

关 键 词：合金钢 钼 分光光度法 

分 类 号：TG142.15[一般工业技术—材料科学与工程]