Accuracy Check
Standard Additions Method
Note: Volume accuracy is very important when performing standard
additions with 10-mL volumes. The fill mark on the 10-mL sample cell is
not intended to measure standard addition volumes.
a) Fill three 10-mL graduated mixing cylinders with 10.0 mL of
sample.
b) Snap the neck off a Manganese Voluette Ampule
Standard,
10 mg/L Mn.
9. After the timer
beeps, place the blank
into the cell holder.
Tightly cover the sample
cell with the instrument
cap.
10.Press: ZERO
The cursor will move to
the right, then the
display will show:
0.000 mg/L Mn
11.Place the prepared
sample into the cell
holder. Tightly cover the
sample cell with the
instrument cap.
12.Press: READ
The cursor will move to
the right, then the result
in mg/L manganese will
be displayed.
Note: Standard Adjust may
be performed using a
prepared standard (see
Standard Adjust in
Section 1).
Note: See Waste
Management below for
proper disposal of cyanide
wastes.
MANGANESE, LR, continued