HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHIC METHOD FOR THE DETERMINATION OF ULTRATRACE AMOUNTS OF IRON(II) IN AEROSOLS, RAINWATER, AND SEAWATER

被引:59
作者
YI, Z
ZHUANG, GS
BROWN, PR
DUCE, RA
机构
[1] UNIV RHODE ISL,DEPT CHEM,KINGSTON,RI 02881
[2] UNIV RHODE ISL,GRAD SCH OCEANOG,CTR ATMOSPHER CHEM STUDIES,KINGSTON,RI 02881
关键词
D O I
10.1021/ac00046a028
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A reversed-phase high performance liquid chromatography method was developed to determine concentrations of iron(II) In Chinese loess, aerosols, rainwater, and seawater. This method was isocratic, rapid, sensitive, and reproducible. Iron(II) form a stable complex ion with the reagent ferrozine, [Fe(FZ)3]2+ in a pH range of 4-10. By measuring the absorbance of [Fe(FZ)3]2+ at 254 nm, iron(II) concentrations wore determined. [Fe(FZ)3]2+ was separated from ferrozine and was detected in 6 min. Reversed-phase C18 solid-phase extraction cartridges, which were used for the sample preparation, concentrated the [Fe(FZ)3]2+ and increased sensitivity of the analysis. A detection limit of 0.1 nM Fe(II) was obtained. Retention time, addition of known amount of standard, and peak area ratios were used for peak identification of [Fe(FZ)3]2+. There was no interference from Fe(III), Ni(II), Co(II), and Cu(I). The recovery of 10(-8)-10(-10) M [Fe(FZ)3]2+ using the preconcentration step was in the range of 92-99%. The Fe(II) concentration in remote marine aerosols has been determined for the first time by using this new method.
引用
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页码:2826 / 2830
页数:5
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