Which criterion typically triggers specimen rejection?

Which criterion typically triggers specimen rejection?

• A. Specimen with proper labeling.
• B. Specimen type is correct.
• C. Insufficient volume.
• D. Storage conditions are ideal.

Answer: (C)

In drug testing, having enough specimen volume is essential because you must perform the initial screen, any required confirmation, and potential repeats or split samples. If there isn't enough material, the lab cannot complete the analyses reliably, so the specimen is rejected to protect accuracy and patient safety.

Proper labeling, correct specimen type, and ideal storage conditions are all favorable and do not trigger rejection on their own. They would only lead to rejection if they were incorrect (e.g., mislabeling or wrong specimen type), whereas in this scenario they are appropriate.