Bentonite 현탁액의 응집특성에 기초한 원료 알로에베라 겔의 In situ 품질평가

초록

The glucomannan content of Aloe vera gel was measured by a novel method using a bentonite suspension that flocculates upon mixing with gels prepared by hand filleting of aloe leaf. An optimum flocculation condition was determined to be Aloe vera gel diluted in the range of 2 to 5-fold and then a bentonite suspension 1% (w/v) mixed with the gel sample in the ratio of 8:2 (v/v) to provide a mixture volume of 10 mL with the length to diameter ratio of 5. Under the conditions of these experiments, a rapid settling (<3 min) of more than 90% of the bentonite was achieved only when the aloe gel sample was properly diluted. The glucomannan concentrations in various diluted samples with the highest settling rates were identified in the range of 195.7±21.4 mg/L; thus, the results indicate that the glucomannan content may be determined from the dilution rate of the aloe gel sample that exhibits the highest settling rate. This study provides a simple, rapid, and cost-effective assay for the estimation of the glucomannan level in raw Aloe vera gel.

키워드