Question

Before being used for a bottle method, test membrane filters are dried at

A) Room temperature
B) 50 degrees Celsius
C) 100 degrees Celsius
D) 150 degrees Celsius

Answer 1

Test membrane filters used in laboratory settings for filtration purposes are dried at 100 degrees Celsius to ensure sterility.

Step-by-step explanation:

Before being used for a bottle method, test membrane filters are dried at 100 degrees Celsius. Drying the filters at this temperature ensures that they are properly sterilized before use, which is particularly important in laboratory settings where contamination must be avoided. These filters are critical for filtering out bacteria and other microbes from liquid samples, especially when working with heat-sensitive solutions. Typically, they possess pore sizes such as 0.2 µm, which are small enough to effectively filter out bacteria.