%0 Journal Article
%T Comparison of Sample Preparation Methods for Multielements Analysis of Olive Oil by ICP-MS
%J Methods and Protocols | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/mps2030072
%X Elemental analysis of olive oils by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is challenging because of the high organic load in olive oil samples and the low analyte concentrations. However, conflicting operating procedures in the preparation of oils prior to analysis by ICP-MS have been reported to overcome these difficulties. This study compared three methods of inorganic elements＊ extraction from olive oils: The two commonly used microwave-assisted, acid digestion, and liquid每liquid, ultrasound-assisted extraction methods; and an optimized method: The combined microwave digestion-evaporation. Overall, microwave digestion-based methods did not compare opportunely, and ultrasound-assisted extraction was found to provide the best accord between simplicity of use, detection limits and precision improvement. The detection limits were in the range of 0.3每160 米g﹞kg- 1, 0.012每190 米g﹞kg ˋ1 and 0.00061每1.5 米g﹞kg ˋ1, while repeatabilities were in the range of 5每21%, 5.4每99% and 5.1每40% for the microwave digestion, the combined digestion-evaporation and the ultrasound assisted extraction, respectively. The ultrasound-assisted extraction is therefore recommended as a preparation method for olive oils prior to analysis by ICP-MS. The broader range of elements that can be accurately detected is expected to help increase the discriminatory power and performance of geographical traceability models. View Full-Tex
%U https://www.mdpi.com/2409-9279/2/3/72