Chapter 5 - Sampling and Testing

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5.1 Types of testing

Testing is classified into one of three categories, based on its purpose and methods.

5.1.1 Monitoring

Monitoring is performed to identify possible areas of concern, or to provide information about violation rates. Monitoring is normally conducted using statistically based random samples. The sampled lots are usually not held, and are released to consumers before the test results are known.

5.1.2 Directed sampling

Directed sampling is designed to identify suspected problems. Directed samples are taken from animals or products which are suspected to have residues, or from groups of animals or types of product which are at higher risk. Animals or products which are deemed suspect are detained until the results of testing are available.

5.1.3 Compliance

Compliance testing is conducted when a violation has occurred, in order to determine whether a corrective action has been effective.

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