Zinc and nickel determination in liquid edible oils by FAAS after the extraction
A new method has been developed for the extraction and determination of zinc and nickel in liquid edible oils by using the complexation of these metals with [N,N′‐bis(salicylidene)‐2,2′‐dimethyl‐1,3‐propanediaminato]. Zn(II) and Ni(II) complexes with a tetradentate Schiff base have been investigated...
Saved in:
Published in | European journal of lipid science and technology Vol. 114; no. 11; pp. 1320 - 1326 |
---|---|
Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.11.2012
WILEY‐VCH Verlag Wiley-VCH |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A new method has been developed for the extraction and determination of zinc and nickel in liquid edible oils by using the complexation of these metals with [N,N′‐bis(salicylidene)‐2,2′‐dimethyl‐1,3‐propanediaminato]. Zn(II) and Ni(II) complexes with a tetradentate Schiff base have been investigated spectrophotometrically. Experimental extraction conditions for these metals from liquid oil standards were optimized using central composite design. Optimum conditions for Zn(II) and Ni(II) extractions from oil have been found close to each other. The ratio of the volume of used Schiff base solution to the amount of oil (VLDM/moil; mL/g), the stirring time and the temperature were round about 1.00 mL/g, 55 min, 32°C, respectively, for simultaneous determination of both metals in same sample. The recovery percentages at the optimum experimental conditions were found 98.9 ± 2.8 and 101.8 ± 4.7 for Zn(II) and Ni(II), respectively. The proposed method was applied on the raw and spiked samples such as olive oil, sunflower oil, corn oil, canola oil and obtained recovery values were between 93.7–107.2 and 93.1–101.1% for Zn(II) and Ni(II), respectively.
Practical applications: There is interest in the determination of metals in liquid edible oils because of their catalytic effect on the oxidation reaction of oils. A new method for the determination of Zn(II) and Ni(II) in liquid edible oils which does not require any digestion or decomposition was developed. This study offeres a cheap, rapid, accurate, sensitive, risk‐free, and practical metal determination method after the extraction.
The molecular structure of [N,N′‐bis(salicylidene)‐2,2′‐dimethyl‐1,3‐propanediaminato]. |
---|---|
Bibliography: | Scientific and Technological Research Council of Turkey (TUBITAK-TBAG - No. 105T153 ArticleID:EJLT201100081 istex:CA5491BF13C6C5746C440E27E62B9CCEA64E52E4 This study was partially presented in 6th Euro Fed Lipid Congress, Athens, Greece, 2008. ark:/67375/WNG-F4M8K5W3-Q |
ISSN: | 1438-7697 1438-9312 |
DOI: | 10.1002/ejlt.201100081 |