What is required when conducting field tests?

What is required when conducting field tests?

• A. No backup testing is required.
• B. Lab backup testing is required.
• C. Documentation of color change is optional.
• D. The substance should be released to law enforcement without testing.

Answer: (B)

Field tests are quick, on-site indications, but they’re not definitive. To be sure of what a substance really is, a backup lab test using validated methods is required. This confirmatory testing provides accuracy, reduces the chance of false positives or negatives, and supports legal admissibility of results. In practice, samples are collected, field-tested, and then sent to the lab for confirmatory analysis (for example, instrumental tests like GC-MS or FTIR). Relying solely on field results or neglecting laboratory confirmation isn’t appropriate, and documenting color changes on its own isn’t sufficient without lab verification.

Field tests are quick, on-site indications, but they’re not definitive. To be sure of what a substance really is, a backup lab test using validated methods is required. This confirmatory testing provides accuracy, reduces the chance of false positives or negatives, and supports legal admissibility of results. In practice, samples are collected, field-tested, and then sent to the lab for confirmatory analysis (for example, instrumental tests like GC-MS or FTIR). Relying solely on field results or neglecting laboratory confirmation isn’t appropriate, and documenting color changes on its own isn’t sufficient without lab verification.