21
METHOD PROCEDURE
• Insert the cuvette into the holder and ensure that the
notch on the cap is positioned securely in the groove.
• Press
Read
. The display will show a 3 minute countdown prior to the measurement.
To skip the timer, press
Read
twice
.
When the timer ends, the meter will perform
the reading. The instrument displays concentration in
mg/L
of
phosphate (PO
4
3¯
).
• Press the
key and use the functional keys to select
Chemical Form
.
• Use the functional keys and press
Select
to change the displayed chemical formula
to
mg/L
of
phosphorus (P)
and
phosphorus pentoxide (P
2
O
5
).
INTERFERENCES
Interference may be caused by:
• Iron, Silica above 50 mg/L
• Copper, Silicate above 10 mg/L
• Arsenate, Highly-buffered samples, Hydrogen sulfide, Turbid samples