Conclusion
. The SO treatment(T2) is most effective on longan which resulted in the longest shelf life, i.e. 31 days at 5 ,76-96%. The HCl manual dipping (T1) is slightly less effective on longan which resulted in shorter shelf life than longan subjected to the HCl machine dipping(T4), i.e. 25 days. The HCl machine dipping (T4) is slightly more superior than T1 as the T4 treated longan has 27 days shelf life.