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This method is suitable for elements present in a solubilized form in most types of vegetable oil. Elements present in fine particles, such as bleaching earth, metal particles and rust, can result in poor recovery of the trace elements present as nebulization and atomization problems affect the ICP-OES analysis.
Milk and milk products (including fat coming from milk and milk products) are excluded from the scope of this International Standard.
NOTE The only suitable non-ashing direct method for samples containing fine particles is graphite furnace atomic absorption spectrometry.
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