What device detects and discriminates between nerve and mustard vapors and can be used to sort contaminated and clean personnel during decontamination?

The Improved Chemical Agent Monitor (ICAM) is specifically designed to detect and discriminate between nerve agents and mustard vapors, making it particularly valuable in chemical warfare scenarios. Its advanced sensors enable the identification of these hazardous chemical agents, allowing personnel to quickly and accurately determine contamination levels in a given area. This capability is crucial during decontamination operations, as it aids in sorting contaminated individuals from those who are clean, thereby ensuring the safety of personnel and allowing for efficient decontamination measures.

In contrast, the portable gas chromatograph is primarily used for analyzing various chemicals but may not have the specific, targeted detection capabilities for nerve and mustard agents that ICAM possesses. A personal dosimeter is used to measure exposure to ionizing radiation, which does not apply to chemical agent detection. The radiation survey meter is designed to detect radioactive materials and is not suitable for identifying chemical agents like nerve agents or mustard vapor. Therefore, the ICAM is the most relevant and effective tool for the task described in the question.