Hach DR/850, Руководство по процедурам, Страница: 215 / 460

215
Method 8034
MANGANESE, High Range
(0 to 20.0 mg/L)
For water and wastewater
Periodate Oxidation Method
*
USEPA approved for reporting wastewater analysis
(digestion is required; see Section 2)
**
* Adapted from Standard Methods for the Examination of Water and Wastewater.
1.
Enter the stored
program number for
manganese, periodate
oxidation method.
Press:
PRGM
The display will show:
PRGM ?
2.
Press:
41 ENTER
The display will show
mg/L, Mn and the
ZERO icon .
Note: For alternate forms
(KMnO
4
, MnO
4
), press the
CONC key.
3.
Fill a sample cell
with 10 mL of sample
(the blank).
Note: For total manganese
determination perform a
digestion (see Section 2).
Note: Adjust the pH of
stored samples
before analysis.
4.
Place the blank into
the cell holder. Tightly
cover the sample cell
with the instrument cap.
5.
Press:
ZERO
The cursor will move to
the right, then the
display will show:
0.0 mg/L Mn
6.
Remove the cell from
the instrument. Add the
contents of one Buffer
Powder Pillow, citrate
type, to the cell. Cap the
cell and invert until the
powder is dissolved.
Remove cap.
7.
Add the contents of
one Sodium Periodate
Powder Pillow to the
sample cell (the
prepared sample). Cap
the sample cell. Invert
for 10 seconds to mix.
8.
Press:
TIMER
ENTER
A two-minute reaction
period will begin.
Note: A violet color will
form if manganese
is present.
** Federal Register , 44 (116) 34193 (June 14, 1979).