Hach-Lange LZV935 - DR 6000 Application Software Drinking Water Benutzerhandbuch
Seite 11
English 11
Literature
E. Goldman, R. Jacobs:
Determination of Nitrates by Ultraviolet Absorption Amer. Water Works
Assoc. 53, 187 – 191, (1961)
Procedure for nitrate self-absorption
1.
Select STORED PROGRAMS > SELECT BY NUMBER.
2.
Enter the number 2101 for the program "Nitrate 10 mm",
measurement range 0.3–15.0 mg/L nitrate. Confirm with OK.
Enter the number 2102 for the program "Nitrate 3 mm",
measurement range 1–60 mg/L nitrate. Confirm with OK.
3.
Press START to start the program.
4.
Insert the zero cuvette (distilled water) and press ZERO.
Z2 is shown in the display.
5.
Insert the standard cuvette with the nitrate standard (program 2101:
10 mg/L, program 2102: 30 mg/L) and press READ.
R2 is shown in the display.
6.
Insert the analysis cuvette with the first sample and press READ.
The result will be displayed on the screen.
Note: In order to analyze further samples, procedure from step 6.
Organic load (SAC)
Principle
The organic load can be determined from a sample through self-
absorption, in other words without use of reagents. The spectral
absorption coefficient is determined in m
-1
.
Application area
Drinking water, surface water, waste water
Measurement range
0–20 m
-1
Accessories
•
Spectrophotometer, 254 nm
•
50 mm rectangular cuvette QS
•
Optional SIP 10 sipper: 50 mm pour-through cuvette QS
Literature
DIN 38404 Part 3 (C3)
Procedure for organic load (SAC)
1.
Select STORED PROGRAMS > SELECT BY NUMBER.
2.
Enter the number 2103 for the program "UV-254 Organics".
Confirm with OK.
3.
Press START to start the program.
4.
Insert the zero cuvette (distilled water) and press ZERO.
5.
Insert the analysis cuvette with the first sample and press READ.
The result will be displayed on the screen.
Note: In order to analyze further samples, repeat the procedure
from step 5.