Question

What method is typically used to dry specimens for scanning electron microscopy?

A) air drying
B) critical-point drying
C) forced air drying
D) vacuum drying
E) dehydrational drying

Answer 1

The method typically used to dry specimens for scanning electron microscopy is critical-point drying. This method involves using liquid carbon dioxide under pressure to displace the water from the specimen, resulting in a dehydrated specimen suitable for SEM imaging.The correct answer is option B.

Step-by-step explanation:

The method typically used to dry specimens for scanning electron microscopy is critical-point drying. This method involves using liquid carbon dioxide under pressure to displace the water from the specimen, resulting in a dehydrated specimen suitable for SEM imaging.

Critical-point drying is used because it ensures that the specimen is thoroughly dried without causing shrinkage or distortion. It is especially important for SEM imaging as it allows for the preservation of surface structures and details.

Other drying methods like air drying, forced air drying, vacuum drying, and dehydrational drying may not be as effective in preserving the specimen's surface features and may result in artifact formation.The correct answer is option B.