Surfactants, Anionic (Detergents)
Surfactants, Anionic (Detergents)
Page 2 of 4
Detergents_None_Other_CVI_Eng_Ody.fm
5. Add 30 mL of
benzene to the funnel.
Stopper the funnel and
shake gently for one
minute.
6. Place the separatory
funnel in a support stand.
7. Touch the timer icon.
Touch
OK.
A 30-minute reaction
period will begin.
8. After the timer beeps,
remove the stopper and
drain the bottom water
layer. Discard this layer.
9. Drain the top benzene
layer into a clean 25-mL
sample cell (this is the
prepared sample).
Do not filter the benzene
layer before color
measurement. Filtration
removes the blue color.
10. Fill another sample
cell to the 25-mL mark
with pure benzene (this is
the blank).
11. Place the blank into
the cell holder.
12. Touch Zero.
The display will show:
0.000 mg/L LAS
13. Place the prepared
sample into the cell
holder.
14. Touch Read.
Results will appear in
mg/L LAS.
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
Zero
10 mL
20 mL
25 mL
Read
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