Analysis of variance indicated that the effect of roasting parameters (temperature, IR power and time) on moisture content was significant (P b 0.05). As shown in Table 1, moisture content of peanut kernels decreased significantly (P b 0.05) from 2.86 to 1.81% by increasing the roasting temperature from 100 to 120 °C and increasing the IR power from 130 to 200 WLED to decrease 22.4% in the moisture content.
Also increasing the roasting time from 10 to 30 min resulted in 47.35% reduction in the moisture content.
(เริ่มเปลี่ยนเป็นตาราง2)Analysis of variance also showed that interaction effect of air temperature,IR power and time on moisture content was significant
(P b 0.05). After 30 min of infrared-hot air roasting, the moisture content of roasted peanut kernels dropped to 0.41% from initial value .