Flow Injection Spectrophotometric Determination of Ferbam Based on a Photochemical Reaction
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- 作者：Tom¨¢s P¨¦rez-Ruiz ; Carmen Mart¨ªnez-Lozano ; Virginia Tom¨¢s ; Antonio Sanz and Raquel Garre
- 关键词：Key words ; Ferbam ; photochemical reaction ; flow ; injection ; waters ; grains.
- 刊名：Microchimica Acta
- 出版年：2003
- 出版时间：January 2003
- 年：2003
- 卷：142
- 期：4
- 页码：231-235
- 全文大小：182 KB
文摘
A flow-injection configuration for the spectrophotometric determination of ferbam is proposed. The procedure is based on the online decomposition of ferbam and complexation of the released Fe3+ with oxalate. The ferrioxalate formed is decomposed upon irradiation with visible light. The Fe2+ produced in the photochemical reaction was monitored by measuring the absorbance after complexation with ferrozine (max=562nm). The method shows a linear range between 1.0 and 30µgmL–1 (2.5×10–6–7.2×10–5molL–1) with a limit of detection of 0.2µgmL–1. Repeatibility was 0.53 % expressed as relative standard deviation (n=10), and reproducibility, studied on five different days, was ±1.23 % . The sampling frequency was about 45samplesh–1. The applicability of the method was tested in the determination of ferbam in waters and grains.