What is the first step in using a field testing kit?

The first step in using a field testing kit is to place a properly sized amount of the substance inside the test kit. This is essential because the reaction that follows relies on the correct sample being introduced into the testing environment. Each field testing kit is designed to work with a specific quantity of sample material to ensure accuracy and reliability in detecting the presence of various substances.

If the amount of substance is incorrect, it can lead to inaccurate results, either generating false positives or negatives. Once the proper sample is added, the subsequent steps—breaking the ampule, agitating, and waiting for the reaction to settle—can then occur in the right order to achieve valid testing results. Proper preparation by using the right amount of the substance provides a foundation for effective testing.