Citric acid – Hach-Lange LZV937 - DR 6000 additional software enzymology tests Benutzerhandbuch
Seite 35
English 35
Citric acid
Procedure for citric acid
1.
Prepare the test according to the process specification.
2.
Select STORED PROGRAMS > SELECT BY NUMBER.
3.
Enter the number 2204 for the program "Citric acid". Confirm with
OK.
4.
Press START to start the program.
5.
Set the blank value cuvette to carousel position 1.
6.
Set the sample cuvettes to carousel positions 2-7.
7.
Press READ CAROUSEL.
The 5:00 timer starts. When the time elapses, two short acoustic
signals are sounded.
Extinction 1 is measured in all cuvettes. R1 is shown on the display.
8.
Pipette the reagent into the blank value and sample cuvettes
according to the process specification.
9.
Press READ CAROUSEL.
The 5:00 timer starts. When the time elapses, two short acoustic
signals are sounded.
Extinction 2 is measured in all cuvettes.
The result is indicated in g/L citric acid, g/L citric acid x 1 H
2
O, g/
100 g citric acid and g/100 g citric acid x 1 H
2
O on the display.
Program number
2204
Parameter
Citric acid
R-Biopharm AG order number
Art. no. 10 139 076 035
Results information
g citric acid / L sample solution
g citric acid x 1 H
2
O / L sample solution
g citric acid / 100 g sample
g citric acid x 1 H
2
O / 100 g sample
Carousel loading
Carousel position 1: Blank value
Carousel position 2-7: Samples 1 to 6