Which statement best describes when laboratory analysis is used in IH?

• A. For real-time field readings.
• B. To provide definitive concentrations after samples are processed.
• C. To replace OSHA standards.
• D. To monitor noise levels.

Answer: (B)

In industrial hygiene, lab analysis delivers definitive contaminant concentrations after samples are collected and processed using validated methods in an accredited laboratory. Real-time readings in the field are valuable for immediate screening and trend spotting, but they can be influenced by interferences, environmental conditions, or instrument limitations and thus don’t give the precise exposure values needed for regulatory compliance. Lab analyses, with established detection limits and quality control, produce accurate, traceable results that can be directly compared to OSHA standards or other benchmarks. Replacing standards isn’t what lab work does, and monitoring noise relies on separate field measurements rather than chemical analysis.