Hach DR/700 Procedures Manual page 307

POLYACRYLIC ACID
For water and brines
Adsorption-Colorimetric Method (as Acrysol
SAMPLE PREPARATION
1.
Remove the
syringe plunger.
Attach the prefilter to
the syringe barrel,
twisting to lock it on.
Note: Samples should
be analyzed promptly.
See Sampling and
Storage following these
steps.
Note: See Interferences
for pretreatment of
turbid or oily samples.
4.
Fill another clean
flask, labeled "reagent
blank" with
approximately 30 mL
of demineralized
water.
®
Acrysol is a registered trademark of the Rohm and Haas Company
(0 to 20.0 mg/L)
2.
Rinse the syringe
with the sample. Fill
to the 30-cc mark.
Note: The syringe
markings may wear off
with continued use.
They can be made more
permanent by scoring
with a knife.
5.
Add 0.5 mL of
Buffer Solution, pH
2.5, to each flask.
Swirl to mix.
Note: Check the sample
pH with pH indicator
paper. If necessary,
adjust to pH 2-3 with
1:1 Nitric Acid Solution.
50-57
Method 8107
®
LMW-20, -45)
3.
Insert the plunger
and force the sample
through the filter into
a 50-mL erlenmeyer
flask labeled
"sample".
6.
Fill a third flask,
labeled "eluant", with
approximately 30 mL
of Polyacrylic Acid
Eluant Solution.