Self-test 6

Baseline noise of the chromatogram.

Because of the nature of the dialysis procedure the dialysate samples are stored at room temperature before loading them to the cooled autosampler possibly causing partial decomposition of the analytes. 

Actual injection volume of the autosampler is by 5% higher than the analyst thinks.

Uncertainty of pipetting when making the calibration solutions (different pipettes are used on different days). 

The laboratory is not well air-conditioned – when the weather is cold then air temperature in the laboratory is quite low, when the weather is hot then the laboratory temperature is quite high. 

Repeatability of integration.

Because of the nature of the dialysis procedure the dialysate samples are stored at room temperature before loading them to the cooled autosampler possibly causing partial decomposition of the analytes.

Repeatability of integration.

Actual injection volume of the autosampler is by 5% higher than the analyst thinks.

Uncertainty of pipetting when making the calibration solutions (different pipettes are used on different days).

The laboratory is not well air-conditioned – when the weather it cold then air temperature in the laboratory is quite low, when the weather is hot then the laboratory temperature is quite high. 

Baseline noise of the chromatogram.

Recovery 

Within-lab reproducibility

Between-lab reproducibility 

Repeatability 

Intermediate precision

Recovery different from 1

Systematic effect caused by the calibration graph

Above average room temperature on a particularly hot day

Incomplete sample matrix decomposition caused by too short digestion time 

Within-lab long term reproducibility 

A-Type precision 

Recovery

Repeatability

Bias