The development of liquid soap products from coconut shell charcoal mixed with cold pressed coconut oil

Abstract

The objective of this research was to develop the liquid soap from the coconut shell charcoal powder mixing with the cold pressed coconut oil by using the natural raw materials and technology of community in Khlong Khuean district, Chachoengsao. The charcoal powder in liquid soap was varied at  different concentrations of 0, 5, 10, 15 and 25% w/v mixed with 10% v/v cold-pressed coconut oil. The qualities of physico-chemical, antioxidant activity, microbial and sensory characteristics of samples were analyzed. It was found that the Hunter L*, a* and b* values of control were 77, 1 and 5,  respectively. When the coconut shell charcoal was added, the L* values decreased (p0.05), while the a* and b* values increased (p0.05). The pH values of all liquid soaps were varied between 9.11-9.46. In addition, the adding of charcoal powder and cold pressed coconut oil did not affect the syneresis of the liquid soaps. The antioxidant activity analysis revealed that the antioxidant activity of charcoal powder was 4.56%, while the antioxidant activity of control sample did not detect. When the charcoal powder at different concentrations of 0, 5, 10, 15, 20 and 25% w/v mixed with the cold-pressed coconut oil 10% v/v were used as the mixtures of liquid soaps, the antioxidant activity of the liquid soaps varied within the range of 28.64-30.48%. The highest overall acceptability of 6.91scores from a full score of 9 score was obtained in the liquid soap mixed with the 15% w/v of the coconut shell charcoal and the 10% v/v of cold-pressed coconut oil. Also, total plate count of this sample was 390 colonies per 1 g of sample, and Staphyloccous aureus, Candida albicans and Clostridium sp. were not detected in which the quality of product accorded the Thai industrial standard No. 1543 (TCPS 95/2552).