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DR/2400
Method 8196
Scope and Application:
* Adapted from The Analyst, 87, 949 (1962)
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
770 Volatile Acids
Touch
.
Start
25 mL
20 mL
25 mL
25 mL
10 mL
20 mL
20 mL
10 mL
10 mL
5.
Pipet 1.5 mL of
ethylene glycol into each
sample cell. Swirl to mix.
VolatileAci_None_Other_ESR_Eng_Ody.fm
For digestor sludges
25 mL
20 mL
10 mL
2.
Pipet 0.5 mL of
deionized water into a
dry 25-mL sample cell
(the blank).
25 mL
20 mL
25 mL
25 mL
10 mL
20 mL
20 mL
10 mL
10 mL
6.
Pipet 0.2 mL of 19.2 N
Sulfuric Acid Standard
Solution into each cell.
Swirl to mix.
3.
Filter or centrifuge
25 mL of sample.
Centrifuging is faster
than filtration.
7.
Place both cells into
a boiling water bath.
Alternatively, the cells
may be boiled in a 500-mL
beaker.
Volatile Acids
Esterification Method*
(27 to 2800 mg/L)
Method 8196
25 mL
20 mL
10 mL
4.
Pipet 0.5 mL of the
filtrate or supernatant
into a second dry 25-mL
sample cell (the prepared
sample).
8.
Touch the timer icon.
Touch
.
OK
A three-minute reaction
period will begin.
Volatile Acids
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