Chlorine Dioxide, Dpd Method - Hach DR/850 Procedures Manual

CHLORINE DIOXIDE
*
DPD Method
USEPA accepted for reporting for drinking water analysis
Note: This product has not been evaluated to test for chlorine and chloramines in medical
applications in the United States.
Using Powder Pillows
1.
Enter the stored
program number for
chlorine dioxide (ClO
2
powder pillows.
Press:
PRGM
The display will show:
PRGM ?
* Procedure is equivalent to Standard Method 4500, Cl0
(0 to 5.00 mg/L)
2.
Press:
112 ENTER
The display will show
)
mg/L, ClO2, and the
ZERO icon.
3.
Fill a sample cell
with 10 mL of sample
(the blank).
Note: Samples must be
analyzed immediately and
cannot be preserved for later
analysis.
Note: Wipe off any liquid or
fingerprints before inserting
the sample cell into the
instrument.
P
2
147
Method 10126
For water
4.
Place the blank into
the cell holder. Tightly
cover the sample cell
with the instrument cap.
Note: For best results, run a
reagent blank using
deionized water as the
sample. Subtract the blank
value from the sample
reading to obtain the final
result. See Reagent Blank
Correction in Section 1 of the
DR/800 Procedure Manual.