Oil Identification of harp seal and other select marine mammals

Forensic science international. Animals and environments Pub Date : 2024-01-29 DOI:10.1016/j.fsiae.2024.100083

Megahn H. Pinedo , Deborah A. Duffield , Dalin N. D’Alessandro , Erin R. Price , Edgard O. Espinoza

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Abstract

Because of the rich omega-3 fatty acids content, harp seal (Pagophilus groenlandicus) oil is a popular supplement that is packaged as pills in Canada and sold for medicinal purposes, although this practice is banned in the United States. Due to US regulations, it is important to be able to distinguish between fish oil and seal oil, but the taxonomic determination of oils provenance has been a difficult problem to solve. In this study, Direct Analysis in Real Time time-of-flight mass spectrometry (DART TOFMS) was used to analyze the chemotypes of blubber samples collected from seven species of marine mammals, including seals, sea lions, and a porpoise. Results indicated that the chemotype profiles found in negative-ion mode could be used to separate all of the species using Discriminant Analysis of Principal Components (DAPC). Consequently, this study suggests that it may be possible to identify the taxonomic source of marine mammal oils based on chemical chemotypes.

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竖琴海豹和其他特定海洋哺乳动物的油类鉴定

由于含有丰富的欧米伽-3 脂肪酸，竖琴海豹（Pagophilus groenlandicus）油是一种很受欢迎的补充剂，在加拿大被包装成药丸出售，用于药用目的，尽管这种做法在美国是被禁止的。根据美国的规定，区分鱼油和海豹油非常重要，但在分类学上确定鱼油的来源一直是一个难以解决的问题。本研究采用实时直接分析飞行时间质谱法（DART TOFMS）分析了从七种海洋哺乳动物（包括海豹、海狮和江豚）身上采集的鲸脂样本的化学型。结果表明，利用主成分判别分析 (DAPC) 可以将负离子模式下发现的化学型特征用于区分所有物种。因此，这项研究表明，可以根据化学化学型确定海洋哺乳动物油的分类来源。

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