Which of the following is a common method for detecting chemical agents?

The use of chemical detection kits or sensors is a common and effective method for detecting chemical agents because these tools are specifically designed to identify the presence of hazardous materials in the environment. These kits often utilize advanced technology such as colorimetric reactions, electrochemical sensors, or other detection mechanisms that can qualitatively or quantitatively assess the concentration of chemical agents. They provide emergency responders with immediate and reliable results, essential for making informed decisions about safety and response measures.

While vapor analysis can also be utilized for detecting certain chemicals, it often requires more sophisticated equipment and is not as broadly applicable or accessible as detection kits. Visual inspection and odoriferous tests rely on human perception, which can be subjective and less reliable in the face of potentially hazardous substances that may not exhibit visible signs or strong odors, making these methods less favored in emergency scenarios.