铁(Ⅲ)-PAN亚硝酸钠吸附催化波  

Adsorptive Catalytic Wave of Iron()\|PAN\|NO\+-\-2 System

作　　者：孟凡昌[1] 李琼[1] 李会诚 谢宝华[1] 

机构地区：[1]武汉大学化学系

出　　处：《分析科学学报》1999年第3期232-234,共3页Journal of Analytical Science

摘　　要：本文在铁－ＰＡＮ络合吸附波体系中引入亚硝酸钠，使测铁的灵敏度提高约２０倍，是目前测铁灵敏度很高的极谱方法。峰电位为－０．５９Ｖ（ｖｓ．ＳＣＥ），检出限约为１×１０－９ｍｏｌ／Ｌ。最佳测定条件为：ｐＨ３．０，ＰＡＮ１．５×１０－５ｍｏｌ／Ｌ。A method for the determination of Fe by adsorptive catalytic wave of Fe()\|PAN\|NO\+-\-2 is developed in this paper. When adding some NaNO\-2 (810\+\{-2\} mol/L) to the solution of Fe()\|PAN\|HAc\|NaAc system, the polarographic current of Fe() will been increased by about 20 times. The peak is at -0.59 V, and is in proportion to the concentration of Fe() in the range of 110\+\{-9\}￣810\+\{-7\} mol/L. This method has been used to determination of Fe in distilled water and NaCl reagent (G.R.) with good results.\=

关 键 词：铁 吸附催化波 极谱 测定 

分 类 号：O614.811[理学—无机化学]