Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7593906 | Food Chemistry | 2015 | 6 Pages |
Abstract
A new method for zinc pre-concentration/separation and determination by molecular fluorescence is proposed. The metal was complexed with o-phenanthroline and eosin at pH 7.5 in Tris; a piece of filter paper was used as a solid support and solid fluorescent emission measured using a conventional quartz cuvette. Under optimal conditions, the limits of detection and quantification were 0.36 Ã 10â3 and 1.29 Ã 10â3 μg Lâ1, respectively, and the linear range from 1.29 Ã 10â3 to 4.50 μg Lâ1. This method showed good sensitivity and selectivity, and it was applied to the determination of zinc in foods and tap water. The absence of filtration reduced the consumption of water and electricity. Additionally, the use of common filter papers makes it a simpler and more rapid alternative to conventional methods, with sensitivity and accuracy similar to atomic spectroscopies using a typical laboratory instrument.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
MarÃa Carolina Talio, MarÃa Gimena Acosta, Mariano Acosta, Roberto Olsina, Liliana P. Fernández,