The analytical results of "weight of the pesticide/total weight of the sample ppm" best describes which type of sample?

The description of "weight of the pesticide/total weight of the sample ppm" refers to a total residue sample because it encompasses all of the pesticide present in the entirety of the sample being analyzed. In this context, the "total weight of the sample" signifies that the analysis is considering the entire mass of the sampled material, providing a comprehensive view of how much pesticide is present in relation to that total mass.

When measuring total residues, analysts aim to evaluate the overall amount of pesticide that may be found, which is crucial for assessing the potential exposure or environmental impact. This methodology is typically used in situations where one needs to understand the full extent of pesticide contamination, rather than isolating specific portions or types of residues that may be present.

In other types of samples mentioned, such as dislodgeable foliar residue, the focus would be more on what can be physically removed from a surface, whereas a surface or swab sample typically targets residues on a defined area. A volume sample might measure the concentration of a substance within a liquid without considering the total mass of solids that could also contain residues. Therefore, the concept of total residues aligns well with the methodology described in the question.