In general, the cost of the analysis increases with the number of pesticides, if they are known. If the pesticides are unknown it is a much more difficult and expensive proposition. Pesticides screening methods are available for a number of pesticide clases. While a screen can eliminate a significant number of pesticides as a cause for concern, it does not allow for a comprehensive determination that no pesticides are present. Proper sampling is essential in order to provide a meaningful result.
Sampling techniques depend on the sample matrix, and also upon what questions are being asked.
In some cases, the only concern is whether or not there is a pesticide present. Return to the MPAL home page.