Hach DR/700 Procedures Manual page 85

BENZOTRIAZOLE OR TOLYLTRIAZOLE
(0 to 15.0 mg/L Benzotriazole; 0 to 20.0 mg/L Tolyltriazole)
For cooling and boiler water
UV Photolysis Method*
1.
Install module
42.01
in a DR/700.
Note: The most reliable
results are obtained
when samples are
analyzed as soon as
possible after
collection.
*Adapted from Harp, D., Proceedings 45th International Water Conference,
October 1984, 299
2.
Press: I/O
The display will show
420 nm
and module
42.01
42-1
Method 8079
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
42.01.1
for benzotriazole or
42.10.1
for tolyltriazole.