What measures ensure traceability of reagents and calibrators in QC?

What measures ensure traceability of reagents and calibrators in QC?

• A. Documentation of lot numbers, expiry, supplier certificates, calibration logs, and chain-of-custody.
• B. Only the supplier name.
• C. Keep all results in a notebook.
• D. Random sampling of lots only.

Answer: (A)

Traceability in QC rests on having complete, verifiable records that connect each measurement to the exact reagents and calibrators used. Documenting lot numbers and expiry dates ties a result to a specific batch and its shelf life, enabling proper assessment of stability and timely replacement. Including supplier certificates confirms that the lot met its stated specifications right from the source, which helps verify quality. Calibration logs show when calibrators were used, their current calibration status, and the reference standards involved, so instrument readings can be trusted and traced to recognized standards. Chain-of-custody records track the movement and handling of reagents from receipt to use, preventing mix-ups or substitutions and ensuring integrity. Together, these elements create a trackable history that allows tracing a result back to its source materials, supports investigations when results are out of spec, enables recalls if needed, and maintains regulatory compliance. Relying only on a supplier name, keeping results in a notebook, or randomly sampling lots does not provide the full linkage and ongoing validation required for true traceability.

Traceability in QC rests on having complete, verifiable records that connect each measurement to the exact reagents and calibrators used. Documenting lot numbers and expiry dates ties a result to a specific batch and its shelf life, enabling proper assessment of stability and timely replacement. Including supplier certificates confirms that the lot met its stated specifications right from the source, which helps verify quality. Calibration logs show when calibrators were used, their current calibration status, and the reference standards involved, so instrument readings can be trusted and traced to recognized standards. Chain-of-custody records track the movement and handling of reagents from receipt to use, preventing mix-ups or substitutions and ensuring integrity.

Together, these elements create a trackable history that allows tracing a result back to its source materials, supports investigations when results are out of spec, enables recalls if needed, and maintains regulatory compliance. Relying only on a supplier name, keeping results in a notebook, or randomly sampling lots does not provide the full linkage and ongoing validation required for true traceability.