Multi-frequency ultrasonic-assisted enzymatic extraction of coconut paring oil from coconut by-products: Impact on the yield, physicochemical properties, and emulsion stability

IF 8.7 1区化学 Q1 ACOUSTICS Ultrasonics Sonochemistry Pub Date : 2024-07-16 DOI:10.1016/j.ultsonch.2024.106996

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Abstract

Extraction of coconut paring oil (CPO) from processing by-products adds value to the product and reduces resource wastage. This study aims to assess the impact of 20 kHz, 20/80 kHz and 20/40/80 kHz of multi-frequency ultrasonic-assisted enzymatic extraction (MFUAEE) on the yield, physicochemical properties, fatty acid composition, total phenolic content, antioxidant activity, and emulsion stability of CPO derived from wet coconut parings (WCP). Results revealed that the CPO extraction yield with MFUAEE was 32.58 % − 43.31 % higher compared to AEE. The tri-frequency 20/40/80 kHz mode of multi-frequency ultrasound pretreatment exhibited the highest CPO extraction yield (70.08 %). The oil extracted through MFUAEE displayed similar fatty acid profiles to AEE, but had lower peroxide value, K₂₃₂ and K₂₇₀ values. Particularly, MFUAEE oil contained higher total phenolic content and exhibited potent DPPH free radical scavenging capacity. Results observed by SEM indicated that the pretreatment with multi-frequency ultrasound more efficiently disrupts the cellular structure of the WCP. Additionally, MFUAEE enhanced emulsion stability through the cavitation effect of ultrasound. These findings suggest that MFUAEE is a valuable approach for method for obtaining CPO with elevated extraction yield and superior quality, thereby enhancing the utilization of coconut by-products.

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多频超声波辅助酶法提取椰子副产品中的椰子刨花油：对产量、理化性质和乳液稳定性的影响

从加工副产品中提取椰子刨花油（CPO）可增加产品价值并减少资源浪费。本研究旨在评估 20 kHz、20/80 kHz 和 20/40/80 kHz 的多频超声波辅助酶解萃取（MFUAEE）对从湿椰子屑（WCP）中提取的椰子屑油的产量、理化性质、脂肪酸组成、总酚含量、抗氧化活性和乳液稳定性的影响。结果表明，与 AEE 相比，MFUAEE 的 CPO 提取率高 32.58 % - 43.31 %。多频超声预处理的 20/40/80 kHz 三频模式的椰子油提取率最高（70.08%）。通过 MFUAEE 萃取的油显示出与 AEE 相似的脂肪酸谱，但过氧化值、K232 和 K270 值较低。特别是，MFUAEE 油含有较高的总酚类物质，并显示出强大的 DPPH 自由基清除能力。扫描电镜观察结果表明，使用多频超声波进行预处理能更有效地破坏 WCP 的细胞结构。此外，MFUAEE 还能通过超声波的空化效应增强乳液稳定性。这些研究结果表明，MFUAEE 是一种有价值的方法，可用于获得提取率更高且质量更优的椰子油，从而提高椰子副产品的利用率。

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来源期刊

Ultrasonics Sonochemistry 化学-化学综合

CiteScore

15.80

自引率

11.90%

发文量

361

审稿时长

59 days

期刊介绍： Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels. Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.