Xylem photoLab 6100 VIS - Manual (Page 178)

Appendix photoLab
®
6100 VIS
178 ba75847e01 08/2009
Correlation coefficient Specifies the extent of the linear relationship of value pairs when
determining the zero point and slope for a user-defined method.
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
measurement results.
How to carry out the method up to measuring with the photometer is
described in the analysis instructions.
The photoLab
®
6100 VIS contains a database with methods. Further-
more, 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.
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 Absorbance value of the original test sample, handled according to
prescription but without color reagent.
Spectrum Distribution of the intensity, transmission or absorbance depending
on the wavelength.
Standard Sample with a defined concentration of the analyte to be determined.
Test sample Designation of the test sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not pro-
cessed.