Which factors influence the selection of a sampling method?

The selection of a sampling method is a complex process influenced by several specific factors, and one of the most critical is the expected concentration of the contaminant, along with considerations of any interfering compounds and laboratory recommendations. When determining the appropriate sampling method, it's essential to understand the anticipated levels of the contaminant in the environment. This helps ensure that the method chosen is sensitive enough to detect the contaminant at those levels, while still being robust enough to handle any potential interference from other compounds that may be present during sampling and analysis.

Moreover, laboratory recommendations can guide the selection of methods that best accommodate the specific characteristics of the samples and contaminants involved. For instance, certain analytical techniques may be more suitable for certain contaminants based on their physical and chemical properties, and labs often have protocols in place to maximize accuracy and reliability.

While location, weather conditions, and sampling quantity can be relevant to the practical aspects of conducting a sampling campaign, they do not directly address the underlying technical requirements that dictate which sampling method will yield the most accurate and reliable results. Thus, focusing on the expected concentration, potential interferences, and laboratory guidelines ensures that the chosen method aligns with the analytical needs of the situation.