EMAIL THIS PAGE TO A FRIEND

Food chemistry

A new chelating reagent and application for coprecipitation of some metals in food samples by FAAS.


PMID 26471537

Abstract

A new, simple and rapid coprecipitation method has been developed to separate and preconcentrate traces of Co(II), Cu(II), Fe(III), Pb(II) and Mn(II) in different samples prior to their determinations by flame atomic absorption spectrometry (FAAS). 2-[(E)-(8-hydroxy-2-methylquinolin-5-yl) diazenyl] benzoic acid (QAN) was firstly synthesized and characterized as a new chelating reagent for determination of some metals. IR spectra, (1)H-NMR spectrum and elemental analysis were evaluated for the characterization of the reagent. These metals were quantitatively recovered with Ni(II)/QAN precipitate in pH range of 8-10. Different factors such as sample volume, amount of QAN, and Ni(II) as carrier element, sample volume, and matrix effects for improving the quality of the preconcentration procedure were optimized. Under optimized experimentally established conditions, analytical detection limits were in the range of 0.03-0.83μgL(-1), while precision (RSD) was <3.5%, and enrichment factor was obtained as 100. The accuracy of the presented coprecipitation method was verified by the analysis of certified reference materials. The method was applied to the determination of the analytes in real samples such as food samples and make up products, and accuracy was found high (recoveries >95%).

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

368407
Deuterium, 99.96 atom % D
D2
617474
Deuterium, 99.9 atom % D
D2
361860
Deuterium, 99.8 atom % D
D2
488690
Deuterium hydride, extent of labeling: 96 mol% DH, 98 atom % D
HD
266167
Manganese, chips, thickness <2.0 mm, 99%
Mn
266132
Manganese, powder, −325 mesh, ≥99% trace metals basis
Mn
463728
Manganese, powder, ≥99.9% trace metals basis
Mn
GF74177736
Manganese, foil, not light tested, 25x25mm, thickness 0.01mm, permanent polyester support, 98.7%
Mn
GF99005193
Manganese, foil, not light tested, 25x25mm, thickness 0.015mm, permanent polyester support, 98.7%
Mn
GF90559794
Manganese, foil, not light tested, 25x25mm, thickness 0.02mm, permanent polyester support, 98.7%
Mn
GF03428625
Manganese, foil, not light tested, 25x25mm, thickness 0.05mm, permanent polyester support, 98.7%
Mn
GF31519975
Manganese, foil, not light tested, 50x50mm, thickness 0.001mm, permanent polyester support, 98.7%
Mn
GF60677646
Manganese, foil, not light tested, 50x50mm, thickness 0.0025mm, permanent polyester support, 98.7%
Mn
GF64815239
Manganese, foil, not light tested, 50x50mm, thickness 0.002mm, permanent polyester support, 98.7%
Mn
GF41418378
Manganese, foil, not light tested, 50x50mm, thickness 0.003mm, permanent polyester support, 98.7%
Mn
GF33640860
Manganese, foil, not light tested, 50x50mm, thickness 0.004mm, permanent polyester support, 98.7%
Mn
GF85367605
Manganese, foil, not light tested, 50x50mm, thickness 0.005mm, permanent polyester support, 98.7%
Mn
GF87981564
Manganese, foil, not light tested, 50x50mm, thickness 0.006mm, permanent polyester support, 98.7%
Mn
GF53022833
Manganese, foil, not light tested, 50x50mm, thickness 0.007mm, permanent polyester support, 98.7%
Mn
GF71274258
Manganese, foil, not light tested, 50x50mm, thickness 0.008mm, permanent polyester support, 98.7%
Mn
GF70055524
Manganese, foil, not light tested, 50x50mm, thickness 0.009mm, permanent polyester support, 98.7%
Mn
GF86610539
Manganese, foil, not light tested, 50x50mm, thickness 0.0125mm, permanent polyester support, 98.7%
Mn
GF00832081
Manganese, foil, not light tested, 50x50mm, thickness 0.015mm, permanent polyester support, 98.7%
Mn
GF61911288
Manganese, foil, not light tested, 50x50mm, thickness 0.01mm, permanent polyester support, 98.7%
Mn
GF94645233
Manganese, foil, not light tested, 50x50mm, thickness 0.025mm, permanent polyester support, 98.7%
Mn
GF05710430
Manganese, foil, not light tested, 50x50mm, thickness 0.02mm, permanent polyester support, 98.7%
Mn
GF27632055
Manganese, foil, not light tested, 50x50mm, thickness 0.05mm, permanent polyester support, 98.7%
Mn
GF11021094
Manganese, rod, 10mm, diameter 4.0mm, cast, 99.5%
Mn
GF34573697
Manganese, rod, 35mm, diameter 2.0mm, cast, 99.5%
Mn
GF38495885
Manganese, rod, 50mm, diameter 4.0mm, cast, 99.5%
Mn