Presumptive tests for drugs are generally used in the laboratory, while confirmatory tests are used in the field.

Name: Presumptive tests for drugs are generally used in the laboratory, while confirmatory tests are used in the field.
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Quizplus · Accepted Answer

Presumptive tests for drugs are often used in the field to quickly determine the presence of a suspected substance. Confirmatory tests are more accurate and specific, and are usually performed in a laboratory setting.

Presumptive Tests for Drugs Are Generally Used in the Laboratory