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ZINC,
continued
7.
Add 0.5 mL of
cyclohexanone to the
remaining solution in
the cylinder.
Note: Use a plastic
dropper because rubber
bulbs may contaminate
the cyclohexanone.
3 minutes
10.
Wait 3 minutes.
30 seconds
8.
Stopper the
cylinder (the prepared
sample). Shake for
30 seconds.
Note: The sample color
will be reddish-brown,
brown or blue
depending on the zinc
concentration.
11.
Place the blank
in the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
61-97
9.
Pour the prepared
sample into a 10-mL
sample cell. Cap the
cell.
12.
Press:
ZERO
The display will
count down to 0.
Then the display will
show 0.00 mg/L and
the zero prompt will
turn off.
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