Flow-injection spectrofluorimetric determination of ethylenethiourea
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- 作者：Tom¨¢s P¨¦rez-Ruiz A1 ; Carmen Mart¨ªnez-Lozano A1 ; Virginia Tom¨¢s A1 ; Antonio Sanz A1 ; Jes¨²s Mart¨ªn A1
- 刊名：Fresenius' Journal of Analytical Chemistry
- 出版年：1998
- 出版时间：October 1998
- 年：1998
- 卷：362
- 期：4
- 页码：399-403
- 全文大小：77 KB
文摘
Abstract A flow-injection configuration is proposed for the fluorimetric determination of ethylenethiourea. The procedure is based on the inhibitory effect of ethylenethiourea on the oxidation of thiamine to thiochrome by mercury(II). A linear calibration graph was obtained between 0.1 and 2.0 wg mL-1, with a sampling rate of 40 samples per hour and a relative standard deviation of about 1.11 % . The usefulness of the method was tested for the determination of ethylenethiourea residues in water, milk, potatoes, pear, grape and apple.