405
Method 8051
SULFATE (0 to 70 mg/L) For water, wastewater, and seawater
SulfaVer 4 Method
*
(Powder Pillows or AccuVac Ampuls); USEPA accepted for
reporting wastewater analysis
**
Using Powder Pillows
* Adapted from Standard Methods for the Examination of Water and Wastewater.
** Procedure is equivalent to USEPA method 375.4 for wastewater.
1. A User-Entered
Calibration is necessary
to obtain the most
accurate results. See the
User Calibration section
at the back of this
procedure. Program 91
can be used for process
control or applications
where a high degree of
accuracy is not needed.
Note: The nature of
turbidimetric tests and
reagent lot variation
requires user calibration
for best results.
2. Enter the stored
program number
for sulfate (SO
4
-
).
Press:
PRGM
The display will show:
PRGM ?
3. Press: 91 ENTER or
the program number
selected for a user-
entered calibration.
The display will show
mg/L, SO4 and the
ZERO icon.
4. Fill a clean sample
cell with 10 mL of
sample.
Note: Filter highly turbid
or colored samples. Use
filtered sample in this step
and as the blank.
Choose Desired
Program Accuracy
To Next Page
Loading...
