In the 2014 season, a sample set of 143 mangosteen fruits with
maturities at color stage 5 when the fruit skin colorwas dark purple
(Palapol et al., 2009) (which was a color suitable for sale at local
markets) was purchased from a wholesale market. Samples in the
2015 season were obtained at color stage 4 (red to reddish-purple)
suitable for export, and stage 5 (Tongdee and Suwanagul, 1989;
Palapol et al., 2009) accounting for 104 and 75 fruits, respectively.
The sample fruits were then transported in an air-conditioned truck
to the laboratory and kept at 25 C and a relative humidity of
approximately 85% in an air-conditioned laboratory overnight so as
to attain temperature equilibrium prior to measurement.