1Calibration requires alignment tool and calibration of a pH glass electrode probe
2 Accuracy is not stated in literature but an estimate is provided in this table
Total Method Uncertainties
gopher
Error
Lo
Hi
Buffer A
0.002
0.002
Buffer B
0.005
0.005
Instrument
0.02
0.02
Sampling
0.00
0.00
TOTALERROR (pH Units)
0.03
0.03
Glass Electrode
Error
Lo
Hi
Buffer 1
0.01
0.02
Buffer 2
0.01
0.02
Buffer 3
0.01
0.02
Instrument
0.02
0.03
Sampling
0.05
0.10
TOTALERROR (pH Units)
0.10
0.19
Sampling error is based on assumptions without any scientific data.
Fluorescent
Error
Lo
Hi
Buffer 1 (pH Meter)
0.01
0.02
Buffer 2 (pH Meter)
0.01
0.02
Buffer 3, if applicable (pH Meter)
0.00
0.02
pH Meter
0.02
0.03
Calibration Factor
0.08
0.12
Instrument
0.03
0.05
Sampling
0.00
0.00
TOTALERROR (pH Units)
0.15
0.26
The calibration factor is derived from the standard calibration rule that when using another tool such as a pH meter to calibrate the fluorescence instrument, the error from the pH meter must be multiplied by a minimum factor of 4 and added to the total error.
Blood Gas Analyzer
Error
Lo
Hi
Calibration Standard
0.01
0.03
Instrument
0.02
0.04
Sampling
0.05
0.10
TOTALERROR (pH Units)
0.08
0.17
Sampling error is based on assumptions without any scientific data.