การพัฒนาสบู่เหลวที่มีส่วนผสมจากสารสกัดหอมหัวใหญ่

Abstract

Abstract

This research aims to develop the liquid soap containing onion (Alium cepa Linn.) extract, it has high antioxidant substance in Quercetin. Antioxidant was extracted from onion by maceration method. The different extraction period of the onion, varied as 6, 12 and 24 hours were tested to determine the optimal range for the most antioxidant efficiency. The physical and chemical properties of liquid soaps were examined as the standard certified by the Thai Industrial Standards Institute (TISI) with Thai industrial standard soap (TIS. 1403-2551). Then, the satisfaction test on the finished product by 30 people by convenience sampling method. The questionnaires includes the users’ satisfaction on color, odor, amount of foam, cleanliness, and overall satisfaction. The study revealed that the antioxidant extraction from the onion within 12 hours, examined by DPPH scavenging activity and calculated for IC₅₀ presented the highest level (183.00 mg/L and standard deviation at 0.45). The physical and chemical properties of liquid soap have met Thai industrial standard soap (TIS. 1403-2551). Free alkaline was not found (pH was acceptable at 8), while insoluble substance in ethanol was 0.006 %. However, the total fat is lower than the industrial standard specification. The respondents’ satisfaction on the soap qualification for its cleanliness and color were in very high level, while the sense of smell, foam and overall satisfaction were in the high level. 

Keywords: onion; liquid soap; extraction