Self-test 6

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

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.

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

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. 

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.

Baseline noise of the chromatogram.

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. 

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

Between-lab reproducibility 

Intermediate precision

Repeatability 

Within-lab reproducibility

Recovery 

Incomplete sample matrix decomposition caused by too short digestion time 

Systematic effect caused by the calibration graph

Above average room temperature on a particularly hot day

Recovery different from 1

Within-lab long term reproducibility 

Repeatability

A-Type precision 

Bias 

Recovery