Hach DR2400 - Quaternary Ammonium Compounds

DR/2400
Quaternary Ammonium Compounds
QuaternaryAmmCom_PP_Other_DBC_Eng_Ody.fm Page 1 of 4
Quaternary Ammonium
Compounds
Method 8337
Direct Binary Complex Method
Powder Pillows
(0.2 to 5.0 mg/L as CTAB)
Scope and Application: For cooling tower water and pool/spa water
1. Touch
Hach Programs.
Select program
401 QAC.
Touch
Start.
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).
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.
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.
5. Touch the timer icon.
Touch
OK.
A two-minute reaction
period will begin.
6. When the timer
beeps, place the blank
into the cell holder.
7. Touch Zero.
The display will show:
0.0 mg/L CTAB
8. Place the prepared
sample into the cell
holder.
Touch
Read.
9. Results will appear in
mg/L CTAB (cetyl-
trimethylammonium
bromide).
Powder Pillows Method 8337
Hach Programs
LINEFILL LINE
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
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25 mL
10 mL
20 mL
25 mL
Zero
10 mL
20 mL
25 mL