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Dual-frequency Countercurrent Ultrasonic-assisted Extraction of the Cold Brew Coffee and in Situ Real-time Monitoring of Extraction Process

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Specialty Radiology
Date 2024 Oct 30
PMID 39476554
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Abstract

This research aimed to examine the effect of countercurrent ultrasound on extraction efficiency of cold brew coffee (CBC). The quality and flavor of CBC obtained by ultrasonic-assisted extraction (UE) were evaluated and compared with traditional extraction (TE). Meanwhile, the UE process was monitored in situ real-time using a near-infrared (NIR) spectrometer. The optimal UE parameters obtained by experiments were dual-frequency of 20/28 kHz, countercurrent ultrasonic treatment time of 50 min, ultrasonic power density of 320 W/L, and material-liquid ratio of 1:15. Under the optimal parameters, the total dissolved solids content (TDS) and extraction yield (EY) were 1.63 % and 20.52 %, respectively. This resulted in an 83.33 % improvement in efficiency matching the TDS and EY of a 5-h TE CBC. In comparison with the control, the contents of total polyphenols, total sugars, and total lipids after ultrasonic treatment increased by 13.79 %, 28.49 %, and 333.33 %, respectively, while the total acids content decreased by 27.81 %. HPLC and HS-SPME-GC/MS analysis showed similar non-volatile and volatile flavor components between UE and TE CBC. A quantitative partial least squares (PLS) prediction model was developed to monitor TDS and CGA levels during the UE CBC. This model demonstrated excellent calibration and prediction performance. (TDS: Rc = 0.9281; RMSECV = 0.0694; Rp = 0.9514; RMSEP = 0.0631. CGA: Rc = 0.9086; RMSECV = 0.0316; Rp = 0.9467; RMSEP = 0.0212). This study explored an efficient approach for the industrialization of CBC production and provided theoretical support for developing an intelligent control system for its process.

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References
1.
Zhang W, Duan W, Huang G, Huang H . Ultrasonic-assisted extraction, analysis and properties of mung bean peel polysaccharide. Ultrason Sonochem. 2023; 98:106487. PMC: 10422121. DOI: 10.1016/j.ultsonch.2023.106487. View

2.
Lee H, Yim J, Lee Y, Lee K . Effect of organic acid-soaking and sonication on the formation of volatile compounds and α-dicarbonyl compounds in Robusta coffee. Ultrason Sonochem. 2023; 99:106580. PMC: 10483508. DOI: 10.1016/j.ultsonch.2023.106580. View

3.
Bae J, Park J, Im S, Song D . Coffee and health. Integr Med Res. 2017; 3(4):189-191. PMC: 5481750. DOI: 10.1016/j.imr.2014.08.002. View

4.
Chow P, Landhausser S . A method for routine measurements of total sugar and starch content in woody plant tissues. Tree Physiol. 2004; 24(10):1129-36. DOI: 10.1093/treephys/24.10.1129. View

5.
Ahmed M, Jiang G, Park J, Lee K, Seok Y, Eun J . Effects of ultrasonication, agitation and stirring extraction techniques on the physicochemical properties, health-promoting phytochemicals and structure of cold-brewed coffee. J Sci Food Agric. 2018; 99(1):290-301. DOI: 10.1002/jsfa.9186. View