In situ Preconcentration Method for Iron(II) in Environmental Water Samples Using Solid Phase Extraction Followed by Spectrophotometry Determination
In situ Preconcentration Method for Iron(II) in Environmental Water Samples Using Solid Phase Extraction Followed by Spectrophotometry Determination
复制标题
固相萃取分光光度法测定环境水样中铁(II)的原位富集方法
DOI：
10.2116/analsci.13.231
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发表时间：
1997
影响因子：
1.6
通讯作者：
K. Hirao
中科院分区：
文献类型：
--
作者：
Minora Okumura;Y. Seike;K. Fujinaga;K. Hirao
基于使用 Sep-Pak C18 柱的固相萃取，开发了一种简单快速的原位富集环境水样中铁 (II) 的方法。水样中的铁(II)被放入带刻度的注射器中以防止铁(II)被空气氧化，在样品采集后立即在pH 4.5下与亚铁嗪(C_20H_12N_4O_6S_2Na_2)转化为有色的阳离子络合物。铁(II)-铁嗪络合物作为与乙酸根离子的离子对吸附在 Sep-Pak C18 上。该复合物在 Sep-Pak C18 上稳定至少 3 周。用丙酮和0.1M盐酸的混合物洗脱吸附的复合物。在 562 nm 处测量复合物的颜色强度。所提出的方法适用于咸水和海水以及淡水。
A simple and rapid method for in situ preconcentration of iron(II) in environmental water samples has been developed, based on solid phase extraction using Sep-Pak C18 cartridges. Iron(II) in water samples, which was taken into a graduated syringe to prevent oxidation of iron(II) by air, was converted into a colored cationic complex with ferrozine (C_20H_12N_4O_6S_2Na_2) at pH 4.5 immediately after sample collection. The iron(II)-ferrozine complex was adsorbed on Sep-Pak C18 as an ion-pair with acetate ion. The complex was stable on Sep-Pak C18 for at least 3 weeks. The adsorbed complex was eluted with a mixture of acetone and 0.1 M hydrochloric acid. The color intensity due to the complex was measured at 562 nm. The proposed method is applicable to brackish and sea waters as well as fresh water.