What is used to detect blister agents?

The correct answer is the option that includes both the M256A1 and M8/M9 paper because each of these methods is effective for detecting blister agents.

The M256A1 is a versatile chemical detection kit designed to identify a range of chemical agents, including blister agents like mustard gas. It utilizes colorimetric detection methods to provide a visual indication of chemical contamination when applied to samples. This method is particularly useful in battlefield scenarios where rapid identification is crucial for the safety of personnel.

On the other hand, M8 and M9 paper are additional tools used in the field for detecting chemical agents. M8 paper specifically identifies liquid chemical agents, including blister agents like mustard and lewisite, by changing color upon exposure. M9 paper serves as a secondary indicator, detecting the presence of hazardous chemical agents through a color change but is not as specific as the M8 paper.

Both detection methods are essential components of a comprehensive chemical detection strategy, ensuring that personnel are adequately trained in using different kits to identify blister agents effectively during operations.