Hach DR/700 Procedures Manual page 689

PHOSPHORUS, ACID HYDROLYZABLE
(0 to 5.00 mg/L)
For water, wastewater and seawater
PhosVer 3 with Acid Hydrolysis; Test 'N Tube
1.
Turn on the COD
Reactor. Heat to
o
103 to 106 C. Place
the plastic shield in
front of the reactor.
Note: Ensure safety
devices are in place to
protect the analyst from
splattering should
leakage occur.
Note: See COD Reactor
manual for temperature
adjustment instructions.
2.
Install module
81.01
in a DR/700
Note: Refer to
Calibration following
these steps.
Note: Clean glassware
with 1:1 hydrochloric
acid solution. Rinse
again with
demineralized water.
Do not use detergents
containing phosphate
to clean glassware.
81-15
Method 8180
Procedure
™
3.
Press:
I/O
The display will show
810 nm
and module
81.01