Which of the following is NOT a factor when selecting a sample container?

The selection of a sample container is critical in ensuring the integrity and reliability of the sample being collected. Various factors play significant roles in this selection process, and color is not one of those essential factors.

When choosing a sample container, the material is important because it can affect the interaction between the container and the sample; certain chemicals may react negatively with specific materials. The shape of the container can also be crucial, as it may influence how samples are stored or transported, as well as how easily they can be mixed or agitated. The size of the container is imperative to ensure that there is enough volume to conduct analysis while avoiding issues related to headspace or sample weight.

Color, while it may be considered for aesthetic purposes or to indicate specific types of samples, does not fundamentally impact the sample's collection, storage, or analysis. Thus, it is not a necessary factor in the decision-making process for selecting a sample container.