Q. Explain about Dry heat sterilization?
It is used to sterilize glass ware, forceps, scissors, scalpels, all glass syringes, swabs, some pharmaceuticals products such as liquid paraffin, dusting powder, fats & grease.
This method requires more time to sterilize (10-90 mins /cycle) owing to warm up time. Efficiency of dry heat oven depends mainly on power available per cubic foot of chamber. The minimum for 30 minutes warm up time is 550 watts per cubic foot.
An accurate pyrometer, thermocouple or thermometer in needed to verify actual temperature for determining cycle time.