A new method based on extraction induced by emulsion breaking for determination of Co and Ni in chocolate bars by graphite furnace atomic absorption spectrometry

A new method based on extraction induced by emulsion breaking for determination of Co and Ni in chocolate bars by graphite furnace atomic absorption spectrometry

This paper describes a new experimental configuration of extraction induced by emulsion breaking method to extract and determine Ni and Co in chocolate bars by graphite furnace atomic absorption spectrometry. At optimized conditions, the sample (0.08 g) was mixed with 4 mL of extractant solution (4%...

Full description

Saved in:
Bibliographic Details
Published in:Food chemistry Vol. 448; p. 139139
Main Authors: Rovasi Adolfo, Franciele, Balczareki Lucena, Nicoly, Trombe Do Valle, Lucas, Machado De Carvalho, Leandro, Noremberg Kunz, Simone
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01-08-2024
Subjects:
EIEB
Emulsion breaking
Food analysis
GF AAS
Membrane filtration
Metal extraction
GF AAS
Emulsion breaking
EIEB
Metal extraction
Food analysis
Membrane filtration
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper describes a new experimental configuration of extraction induced by emulsion breaking method to extract and determine Ni and Co in chocolate bars by graphite furnace atomic absorption spectrometry. At optimized conditions, the sample (0.08 g) was mixed with 4 mL of extractant solution (4% m/v Triton X-100 and 10% v/v HNO3) in a plastic syringe to form a solid-oil-water emulsion. Then, emulsion breaking was assisted by membrane filtration. The total extraction procedure took approximately 1 min, in opposition to 25 (centrifugation) and 50 min (heating). Extraction yields ranged from 94.8 to 114.3% for Co and from 85.9 to 108.4% for Ni. The limits of detection and quantification were, respectively, 24.73 and 82.45 μg Kg−1 for Co and 49.05 and 163.5 μg Kg−1 for Ni. Recoveries ranged from 92.1 (Ni) to 105.4% (Co). [Display omitted] •A new experimental set-up of extraction induced by emulsion breaking is presented.•Membrane filtration eliminates the heating and/or centrifugation step.•The method was applied to extract Co and Ni from chocolate bars.•Analytes were determined by GF AAS with good precision and accuracy.•The proposed method was simpler and faster than conventional EIEB approach.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2024.139139