Quaternary Ammonium Compounds - Hach DR2400 Manual

DR/2400
Method 8337
Powder Pillows
Scope and Application:
Powder Pillows
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
401 QAC
Touch .
Start
5.
Touch the timer icon.
Touch .
OK
A two-minute reaction
period will begin.
QuaternaryAmmCom_PP_Other_DBC_Eng_Ody.fm
For cooling tower water and pool/spa water
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
2.
Fill one sample cell
with 25 mL of deionized
water (the blank) and
another sample cell with
25 mL of sample (the
prepared sample).
25 mL
20 mL
10 mL
6.
When the timer
beeps, place the blank
into the cell holder.
Quaternary Ammonium
Direct Binary Complex Method
(0.2 to 5.0 mg/L as CTAB)
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
3.
Add the contents of
one QAC Reagent 1
Powder Pillow to each
sample cell.
Swirl the sample cells to
dissolve the reagent.
Do not shake! Shaking
creates air bubbles that
interfere with test results.
Zero
7.
Touch .
Zero
The display will show:
0.0 mg/L CTAB

Quaternary Ammonium Compounds

Compounds
Method 8337
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
4.
Add the contents of
one QAC Reagent 2
Powder Pillow to each
sample cell.
Swirl the sample cells to
dissolve the reagent. Do
not shake.
A purple color will form if
quaternary ammonium
compound is present.
25 mL
20 mL
10 mL
8.
Place the prepared
sample into the cell
holder.
Touch .
Read
9.
Results will appear in
mg/L CTAB (cetyl-
trimethylammonium
bromide).
Page 1 of 4