In sample acceptance, which of the following shall be checked?

• A. Sample Density
• B. Sample Integrity
• C. Amount of Sample
• D. Both Sample Integrity and Amount of Sample

Answer: (D)

Ensuring the sample is usable for analysis requires confirming two things: the sample's integrity remains intact, and there is enough material to perform all planned analyses. Integrity means the sample hasn’t degraded, leaked, become contaminated, or been mishandled, and it’s properly labeled and stored as required. If integrity is compromised, test results can be biased or invalid; if the amount is insufficient, there isn’t enough material to complete the analyses or to repeat tests if needed. Density or other properties may be checked later for specific methods, but they’re not general acceptance criteria. Therefore, both sample integrity and amount of sample are checked.