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- Title
Effects of powdered activated carbon, diatomaceous earth and β-cyclodextrin treatments on the clarity and volatile compounds of tilapia ( Oreochromis niloticus) skin gelatin.
- Authors
Zhang, Zhiping; Niu, Lihong; Sun, Lin; Huang, Yiqun; Fan, Yuxia; Wang, Xiaohui; Lai, Keqiang
- Abstract
Fish gelatin may have unpleasant odor that adversely affects its applications. Powdered activated carbon (PAC, 0.5-2.0% w/v), diatomaceous earth (DE, 0.1-0.5% w/v) and β-cyclodextrin (CD, 1.0-3.0% w/v) were used to purify tilapia ( Oreochromis niloticus) skin gelatin at various absorption temperature and time (30-50 °C; 10-60 min). The use of all three materials at optimized conditions could lead to a significant improvement in the clarity of 6.67% (w/w) gelatin solutions: the transmittance was increased from 85 to 92-93% at 640 nm, and the color was changed from light yellow to colorless. There were 18 volatile compounds (11 aldehydes, 4 alcohols, and 3 other compounds) identified from the tilapia gelatin solution, and the number was reduced to 12 after the DE treatment (0.5%, 50 °C, 30 min) and to 9 after the PAC treatment (1.5%, 40 °C, 30 min). The amounts of all detectable compounds were greatly decreased after the PAC (decreased 12-89%) and β-CD treatments (decreased 35-96%), but less satisfied results were obtained with the DE treatments.
- Publication
Journal of Food Measurement & Characterization, 2017, Vol 11, Issue 2, p894
- ISSN
2193-4126
- Publication type
Article
- DOI
10.1007/s11694-016-9461-6