The crude roselle oil was obtained from Payakkaram Temple in Suphanburi. All chemicals used in the experiments, such as methanol, potassium hydroxide, and n-heptane, were of analytical reagent (AR) grade.
The crude roselle oil was obtained from Payakkaram Temple inSuphanburi. All chemicals used in the experiments, such asmethanol, potassium hydroxide, and n-heptane, were of analyticalreagent (AR) grade.