The effect of temperature of the acrylamide formation was less
dramatic for vacuum frying (Figure 8) because of the lower frying
temperatures used. For potato chips fried at 118 °C and 125 °C, the
acrylamide formation rate was very low (ranging from 0.02 to 0.08
ppb/s) during the first 480 s of frying. After 600 s of frying, the acrylamide
content increased from approximately 25 to 48 ppb at the
frying temperature of 118 °C and from 30 to 112 ppb at 125 °C.
However, for the frying temperature of 140 °C, acrylamide formation
was favored as frying time increased, reaching a maximum at
480 s (about 524 ppb). At 600 s of frying, though, acrylamide formation
was reduced by about 2 times the amount formed at 480 s. The
chips fried at 140 °C were over-fried by 240 s to demonstrate the
effect of time-temperature effects on the acrylamide rate during
vacuum frying.