Which of the following is a reason to perform decontamination?

• A. Lowers cross-contamination
• B. Improves data validity
• C. Required by law
• D. All of the above

Answer: (D)

Decontamination is done to prevent the spread of contaminants and to protect both sample integrity and safety. It lowers cross-contamination by removing residual contaminants from surfaces and equipment, so later samples aren’t tainted. It also improves data validity because measurements reflect the true characteristics of the sample rather than carryover from previous work. Additionally, many regulations require proper decontamination to protect public health and ensure compliance with safety and quality standards. Since all of these reasons apply, choosing all of the above is the best answer.