Hach DR/700 Procedures Manual page 667

TANNIN AND LIGNIN
For water, wastewater, boiler water
Tyrosine Method*
1.
Install module
69.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
*Adapted from Kloster, M.B., Journal American Water Works Association, 1974, Vol 66,
No. 1, p 44.
(0 to 9.0 mg/L)
2.
Press:
I/O
The display will show
690 nm
and module number
69.01
69-7
Method 8193
3.
After 2 seconds,
the display will show
a program number,
the concentration
units and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
69.02.1