What is a carryover testing protocol and how often should it be performed on an analyzer?

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Multiple Choice

What is a carryover testing protocol and how often should it be performed on an analyzer?

Carryover testing protocol is about checking whether residues from a high-concentration sample affect the next sample on the analyzer. The way it’s assessed is by using alternating high and low concentration samples to see if the signal in the low-concentration run is inflated by material carried over from the preceding high-concentration sample. This helps ensure the instrument isn’t contaminating subsequent measurements and that results are truly due to the current sample. You perform this protocol during instrument acceptance to confirm the system starts clean, after maintenance to verify maintenance didn’t introduce carryover, and periodically as part of ongoing quality checks to monitor performance over time. Descriptions about testing sample temperature, reagent purity, or instrument vibration don’t address the issue of residual carryover between samples, which is why they aren’t the correct focus of a carryover testing protocol.

Carryover testing protocol is about checking whether residues from a high-concentration sample affect the next sample on the analyzer. The way it’s assessed is by using alternating high and low concentration samples to see if the signal in the low-concentration run is inflated by material carried over from the preceding high-concentration sample. This helps ensure the instrument isn’t contaminating subsequent measurements and that results are truly due to the current sample.

You perform this protocol during instrument acceptance to confirm the system starts clean, after maintenance to verify maintenance didn’t introduce carryover, and periodically as part of ongoing quality checks to monitor performance over time.

Descriptions about testing sample temperature, reagent purity, or instrument vibration don’t address the issue of residual carryover between samples, which is why they aren’t the correct focus of a carryover testing protocol.

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