Spectroquant Pharo 300 - Page 234

Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
ADMI Color Measurement
corresponds to APHA 2120F (ADMI Weighted-Ordinate Spectrophotometric Method)
Application
Place the cell into the
cell compartment.
Select method no. 2517
or 2518.
Important:
The exact procedure as well as further details on the
method used can be found in the corresponding applica-
tion.
This application can be downloaded directly at
www.analytical-test-kits.com.
Filter turbid samples.
Measuring 10 – 500 10-mm cell Method No. 2517
range: 2.0 – 100.0 50-mm cell Method No. 2518
Attention! The measurement is carried out in a corresponding rectangular cell against a blank, prepared from distilled
water (Water for analysis EMSURE
®
, Cat.No. 116754, is recommended).
Determination at the original pH:
Transfer the solution into
a corresponding cell.
Check the pH of the
sample, specified value
:
pH 7.0.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Determination at pH 7.0:
Place the cell into the
cell compartment.
Select method no. 2517
or 2518.
Transfer the solution into
a corresponding cell.
Preparation:
Note:
This method can be recalibrated by the user (one-point
calibration).
This method is activated by hitting the Blank
Zero key and is subsequently menu-controlled (see the
application for further details).
In the case of serial measurements the accuracy of the
measurement can be enhanced by making a zero setting
prior to each individual measurement.
Quality assurance:
To check the measurement system (measurement device,
and handling) ready-for-use
platinum-cobalt color ref
er-
ence solution (Hazen 500)
Certipur
®
, Cat.No. 100246,
concentration 500 mg/l Pt can be used after diluting ac-
cordingly.