The influence of several different culinary processes on various preservative contents was investigated. 56 samples of shrimp (Parapenaeus longirostris, Lucas, 1846) fortified with 6 preservatives were analysed by TLC (thin-layer chromatography) followed by exposure to UV light.
We have observed that cooking and freezing modify the Rf values of some preservatives.
No preservatives were detected in the original samples.
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