四丁基溴化铵-硫酸铵双水相萃取Fe(phen)_3的行为研究
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摘要
利用四丁基溴化铵(TBAB)-硫酸铵-水双水相体系,研究了铁-邻二氮菲[Fe(phen)3]络合物在二相中的萃取行为。Fe4+与邻二氮菲形成稳定的1:3的配合物后,被萃取到四丁基溴化铵相中,与邻二氮菲法相比,在511 nm处摩尔吸光系数中增加了10倍(由1.1×104L/(mol·cm)增加到1.1×105L/(mol·cm)),可有效提高邻二氮菲法的检出限。方法的线性回归方程A=0.0041+0.0075ρ,相关系数R=0.9993,线性范围0~50μg/25 m L。
An aqueous two-phase system of tetrabutylammonium bromide( TBAB)-( NH4)2SO4mixture has been developed for the determination of the Fe2 +ion chelated with 1,10-Phenanthroline monohydrate( phen)and formed Fe( phen)3which could be extracted into TBAB phase( upper phase). Compared with conventional1,10-phenanthroline spectrophotometric method,molar absorption coefficient increased ten times from 1. 1 × 104 to 1. 1 × 105 L /( mol · cm) at λmax511 nm,which would largely improve the detection limit of the ion. The method is robust and accurate. Linear regression equation was A = 0. 0041 + 0. 0075ρ with linear correlation coeffficient R = 0. 9993,and Beer's law was obeyed in the range of 0 ~ 50 μg /25 m L.
An aqueous two-phase system of tetrabutylammonium bromide( TBAB)-( NH4)2SO4mixture has been developed for the determination of the Fe2 +ion chelated with 1,10-Phenanthroline monohydrate( phen)and formed Fe( phen)3which could be extracted into TBAB phase( upper phase). Compared with conventional1,10-phenanthroline spectrophotometric method,molar absorption coefficient increased ten times from 1. 1 × 104 to 1. 1 × 105 L /( mol · cm) at λmax511 nm,which would largely improve the detection limit of the ion. The method is robust and accurate. Linear regression equation was A = 0. 0041 + 0. 0075ρ with linear correlation coeffficient R = 0. 9993,and Beer's law was obeyed in the range of 0 ~ 50 μg /25 m L.
引文
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[3]张均祥,吴长俊,李帅.广东化工,2012,39(6):323
[4]高云涛,王伟.应用化学,2002,19(6):578
[5]夏寒松,余江,胡雪生,等.化工学,2006,57(9):2149
[6]Shibukawa M,Ichikawa R,Baba T,et al.Polymer,2008,49(19):4168
[7]Riedl W,Raiser T.Desalination,2008,224(1-3):160
[8]Albertsson P A.Partition of Cell Particlesand Macromolecules.NY:Wileyand Son,1986:135
[9]马春宏,朱红,王良,等.光谱实验室,2010,27(5):1906
[10]Yoshifumi.Akama,M.Ito,S.Talanta,2000,53:645
[11]Yoshifumi Akama,Ahat Sali.Talanta,2002,57:681
[12]Ahat Sali,赤间美文,田中诚之.J Chem Soc Japan,2001,(11):649
[13]艾海提·沙力,玛合甫拉提·吾不力哈斯木,努尔古丽.新疆大学学报,2007,(1):67
[14]吴艳平,吕鹏飞,卢维奇,等.冶金分析,2007,27(10):69
[15]李玉玲,方林霞,马万山.冶金分析,2008,28(11):61
[16]吴艳平,许虹,黄婷婷.河南师范大学学报,2009,37(1):109
[17]沈久明,孙俊永,遆静静,等.光谱实验室,2010,27(5):1868
[18]刘鹏,杨秀清,马万山.冶金分析,2008,28(10):74