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Glass capillary gas chromatography (GCGC) on 100‐m and 60‐m SP2340 columns was used for quantitation of the trans unsaturated fatty acids in shortenings and fast foods. The separation of the cis and trans octadecenoates on GCGC was evaluated by preparatory argentation thin layer chromatography. In addition, the trans content of shortening samples obtained by GCGC was compared to trans content determined by infrared analysis.
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Lanza et al. (1981) studied this question.
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