Discrepancies in the Calibration of Reaction Rate Analysers
Author Information
Author(s): E. F. Legg, J. D. Cooper, M. R. Holland, J. Willis
Primary Institution: East Birmingham Hospital, Birmingham, England
Hypothesis
What factors are responsible for discrepancies between two LKB reaction rate analysers?
Conclusion
The study identified calibration differences and proposed a new calibration method to improve inter-laboratory agreement.
Supporting Evidence
- Calibration differences were not related to reagent concentrations.
- A 5 nm difference in peak absorbances of filters accounted for nearly 5% of the discrepancy.
- Enzyme activities calculated using different absorbance scales showed consistent differences.
- Electronic calibration improved the agreement between the two analysers.
Takeaway
The study found that two machines measuring the same thing were giving different results, and they figured out why and how to fix it.
Methodology
The study involved comparing enzyme activity measurements from two different reaction rate analysers and investigating calibration methods.
Potential Biases
Potential bias from the calibration methods used and the specific instruments tested.
Limitations
The study may not account for all potential sources of error in enzyme activity measurements.
Statistical Information
P-Value
<0.001
Statistical Significance
p<0.001
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