Which factor does NOT influence the results of a toxicity test?

The factor that does not influence the results of a toxicity test is the color of the test container. While the type of substance tested, duration of exposure, and type of analytical method used can all significantly impact the results of a toxicity test, the color of the container does not inherently affect the toxicity of the substance being tested.

The type of substance tested is crucial because different substances have varying levels of toxicity, which directly affects the results. The duration of exposure is also important, as longer exposure times can lead to different toxicity effects. The analytical method should provide reliable and valid results; thus, the choice of method can influence the interpretation of toxicity data.

In contrast, the container's color generally does not impact chemical interactions or the inherent toxicity of a substance, making it irrelevant to the outcomes of toxicity testing.