Which item is unrelated to quality control activities in the laboratory?

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Quality control in the laboratory centers on maintaining the integrity of samples, reagents, and equipment, and on monitoring processes that could impact result accuracy. Checking expiration dates of evacuated tubes ensures you’re not using expired supplies that could contaminate specimens or alter results. Recording refrigerator temperature daily is essential to keep specimens and reagents stored at appropriate conditions; temperature drift or failures can affect test outcomes. Documenting maintenance on the centrifuge ensures the device is calibrated and operating properly, which directly influences the reliability of separations and results. Filling out time sheets, while important for staffing and administration, does not affect the quality of testing or the reliability of results, so it lies outside typical quality control activities.