Missing concentration values in Results

Missing concentration values in Results

Whenever a concentration cannot be calculated, a specific status is shown in WebIDQ > Results.

Due to analytical reasons, concentration values may not be available, and will be represented by these statuses:

NA

Empty values are replaced with NA

NaN

Sample volume or ISTD counts is <= 0, then the concentration is NaN.

0

Analyte counts/area is zero, but the ISTD counts/area is not zero.

Calibrated concentration is smaller than zero, the concentration is set to 0.

Concentration calculation not possible

1. Signal intensity below the defined "height threshold".
   
2. Calibration failed. A note "Calibration failed" is shown.
   
3. Blank samples do not contain ISTDs. Concentrations are not available but intensities.
   

For additional information, refer to the WebIDQ user manual.