5′-硝基水杨基荧光酮分光光度法测定钼  

Spectrophotometric Determination of Molybdenum(Ⅵ) with 5'-Nitro-Salicylfluorone and Its Application

作　　者：张立芳[1] 曹伟[2] 傅艳静[2] 张思宝[2] 秦承兵[2] 

机构地区：[1]唐山学院东校区管理系,唐山063020 [2]济南大学化学化工学院,济南250022

出　　处：《理化检验（化学分册）》2007年第9期751-752,755,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：山东省教育厅科研基金(No.03C05)

摘　　要：研究了5′-硝基水杨基荧光酮分光光度测定钼的方法。在磷酸介质中,表面活性剂OP存在下,钼(Ⅵ)与5′-硝基水杨基荧光酮形成稳定的桔红色络合物,其最大吸收波长为528 nm,表观摩尔吸光率ε528=1.22×10~5L·mol^(-1)·cm^(-1),钼的质量浓度在0.30 mg·L^(-1)以内符合比耳定律。方法应用于不含钨、钛或其含量极低的碳钢及低合金钢中微量钼的测定,所得结果与标准值相符。5＇-Nitrosalicylfluorone（5＇-NSF）was used as chromogenie reagent in the spectrophotometric determination of molybdenum（Ⅵ）.In a dil.H3 PO_4 medium and in the presence of non-ionic surfactant OP,a stable and orangered colored complex was formed between Mo（Ⅵ）and 5＇-NSF,with absorption maxima at the wavelength of 528 nm,and molar absorptivity（ε528）of 1.22×10^5L·mol^-1·cm^-1.Beer＇s law was kept with concentration of Mo（Ⅵ）within 0.30 mg·L^-1.The proposed method has been used in the determination of mieroamounts of molybdenum in carbon steel and low alloy steel containing no or small amounts of tungsten and titanium giving results in consistency with the standard values.

关 键 词：分光光度法 5′-硝基水杨基荧光酮 钼 碳钢 低合金钢 

分 类 号：O657.32[理学—分析化学]