Physicochemical Characterization of Edible Insect Oils: Insights into Fatty Acid Composition, Thermal Behavior and Quality Parameters

Q4 Environmental Science

Asean Journal on Science and Technology for Development Pub Date : 2024-01-01 DOI:10.61931/2224-9028.1527

E. Phuah, Yee‐Ying Lee, T. Tang, Guanghui Li, Shyang-Pei Hong, S. A. Lim

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Abstract

Edible insects are emerging as a sustainable food source due to their high nutritional value. This study employed the three-phase partitioning (TPP) method to extract oils from sago worm ( Rhynchophorus ferrugineus ), superworm ( Zophobas morio ), and cricket ( Gryllus campestris ). The study evaluated and compared the physicochemical properties of these insect oils, including iodine value (IV), peroxide value (PV), p -anisidine value (p-AV), acid value (AV), refractive index (RI), thermal behavior, and fatty acid compositions. Results revealed that the sago worm exhibited the highest oil yield (47.8 ± 2.2%) compared to the superworm (23.8 ± 1.4%) and cricket (6.4 ± 0.6%). Cricket oil (CO) displayed the highest IV (85.62 ± 0.35 g/100 g), PV (50.50 ± 1.10 mEq/kg), and p-AV (4.66 ± 0.45), while AV and RI were the highest in sago worm oil (SWO) (8.23 ± 0.09 mg KOH/g) and superworm oil (SO) (1.4655 ± 0.00), respectively. The melting and crystallization pro ﬁ les of these insect oils varied. Palmitic acid (C16:0) was the predominant fatty acid in all insect oils. CO exhibited the highest content of unsaturated fatty acids (51%), followed by SO (42%) and SWO (39%). This study highlights the potential applications of insect oils in various industries.

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食用昆虫油的物理化学特征：洞察脂肪酸组成、热行为和质量参数

由于营养价值高，食用昆虫正成为一种可持续的食物来源。本研究采用三相分配法（TPP）从西米虫（Rhynchophorus ferrugineus）、超级虫（Zophobas morio）和蟋蟀（Gryllus campestris）中提取昆虫油。研究评估并比较了这些昆虫油的理化性质，包括碘值（IV）、过氧化值（PV）、对甲氧基苯胺值（p-AV）、酸值（AV）、折射率（RI）、热行为和脂肪酸组成。结果显示，与超级蠕虫（23.8 ± 1.4%）和蟋蟀（6.4 ± 0.6%）相比，西米虫的出油率最高（47.8 ± 2.2%）。蟋蟀油（CO）的 IV 值（85.62 ± 0.35 g/100 g）、PV 值（50.50 ± 1.10 mEq/kg）和 p-AV 值（4.66 ± 0.45）最高，而西米虫油（SWO）（8.23 ± 0.09 mg KOH/g）和超级蠕虫油（SO）（1.4655 ± 0.00）的 AV 值和 RI 值分别最高。这些昆虫油的熔点和结晶度各不相同。棕榈酸（C16:0）是所有昆虫油中最主要的脂肪酸。不饱和脂肪酸含量最高的是 CO（51%），其次是 SO（42%）和 SWO（39%）。这项研究强调了昆虫油在各行各业中的潜在应用。

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