Spectroquant Pharo 300 - Page 220

Appendix Spectroquant
®
Pharo 300
220
ba75703e07 04/2014
Detection procedure The detection procedure designates the general principle of how a
sample is brought into a form suitable for measurement.
Different methods can be based on the same detection procedure.
Kinetics Measurement over a period of time.
MatrixCheck see AQA3.
Measured value The measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and
unit (e.g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Method A method comprises a chemical detection procedure and special
method data (calibration line) that is required to evaluate the mea-
surement results.
How to carry out the method up to measuring with the photometer is
described in the analysis instructions.
The Spectroquant
®
Pharo 300 contains a database with methods.
Furthermore, user-defined methods can be entered in the database
as well.
PhotoCheck standard Stable color solution with defined absorbance values for the check of
the photometer.
Reagent blank value The evaluation of the photometric measurement always refers to the
comparison value of a test sample without the substance to be deter-
mined (reagent blank value). Thus the influence of the basic absor-
bance of the reagents on photometric measurement is compensated
for.
For all measurements with Spectroquant
®
test sets (concentration
mode) there is an exactly determined reagent blank value stored in
the photometer. This value can, however, be overwritten by a reagent
blank value measured by yourself.
Recovery The recovery rate is the found measured value divided by the default
value (percentage).
Example: Default value 20 mg/l; Found 19.7 mg/l => recovery 0.985
or recovery rate 98.5%.
Reference absorbance With the reference absorbance, the basic absorbance stored in the
photometer can be replaced by a measurement of your own.
Reset Restoring the original condition of all settings of a measuring system.
Sample blank value The sample blank value is a characteristic of the sample (coloration)
to be currently determined. It is diluted according to the used method
but does not contain any color reagents.
The pH value corresponds to that of the test sample.
Spectrum Distribution of the intensity, transmission or absorbance depending
on the wavelength.
Standard Sample with a defined concentration of the analyte to be determined.