Copper interference on the spectrophotometric determination of iron and their simultaneous determination using bathophenantroline-disulfonic acid disodium salt

被引：0
|
作者：
B. Baraj
J. L. Cortina
A. Sastre
M. Granados
机构：
[1] Chemical Engineering Department,
[2] Universitat Politècnica de Catalunya,undefined
[3] E.T.S.E.I.B.,undefined
[4] Diagonal 647,undefined
[5] E-08028 Barcelona,undefined
[6] Spain,undefined
[7] On leave from: Department of Analytical Chemistry,undefined
[8] Tirana University,undefined
[9] Tirana,undefined
[10] Albania,undefined
[11] Analytical Chemistry Department,undefined
[12] Universitat de Barcelona,undefined
[13] Martí y Franqués 1,undefined
[14] E-08028 Barcelona,undefined
[15] Spain,undefined
来源：
Fresenius' Journal of Analytical Chemistry | 1998年 / 360卷
关键词：
Iron; Copper; Waste Water; Treatment Plant; Water Treatment;
D O I：
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学科分类号：
摘要：
The interference of copper on the spectrophotometric determination of iron with bathophenantroline-disulfonic acid disodium salt was studied using an experimental design. Copper interferes even below pH 5 [1], forming a yellow complex with bathophenantroline which turned to green after 5 min. This complex showed a maximum at 425 nm with a molar absorptivity of 7.5 × 103 L mol–1 cm–1. Microgram quantities of iron and copper were determined simultaneously in water standard samples using bathophenantroline-disulfonic acid disodium salt at pH 4.8 and measuring the absorbances at two wavelengths. The interference of iron on the copper determination was also estimated. The RSDs of the method for both Cu and Fe were below 1.7%. Recoveries for Cu and Fe were within the ranges 97.2% to 98% and 99.7 to 100.5%, respectively. The method was applied to the determination of copper and iron in the waste water from a water treatment plant. The results obtained by spectrophotometry were compared with those obtained by flame AAS.
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页码：263 / 265
页数：2
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