57
Phosphorus, Total
•
Press the
Zero
key. The instrument will perform a zero sequence and after a few seconds the display
will show “
-0.0-
”. Now the meter is zeroed and ready for measurement.
•
Remove the vial.
•
Remove the cap and add the content of one packet of HI 93758-0
Phosphorus Reagent.
•
Replace the cap tightly and shake gently to mix for about 2 minutes
until all the powder is completely dissolved. This is the sample.
•
Place the vial into the holder and push it completely down.
• Press
Timer
and the display will show the countdown prior to the measurement and the “
Reaction
Time
” message. Alternatively, wait for 3 minutes and press
Read
.
• The instrument will perform the reading. The instrument displays concentration in
mg/L of phosphorus
(P).
The method detects free (orthophosphate) and condensed inorganic forms (meta-, pyro- and other
polyphosphates) of phosphates present in the sample.
• Press
s
or
t
to convert the result in mg/L of phosphate (PO
4
3
-) or mg/L of P
2
O
5
.