Hanna Instruments HI 83213-2008 - Manual (Page 59)

59 Phosphate HR
• Add the content of one packet of HI 93717B-0 Phosphate HR
Reagent B to the cuvette. Replace the cap and shake gently
until completely dissolved.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 5 minutes and press Read. When the timer ends the meter will perform the reading. The instrument
displays the results in mg/L of phosphate (PO
4
3 ¯).
• Press or to access the second level functions.
• Press the Chem Frm key to convert the result in mg/L of phosphorus (P) and phosphorus pentoxide
(P
2
O
5
).
• Press or to return to the measurement screen.
INTERFERENCES
Sulfide
Chloride above 150000 mg/L
Calcium above 10000 mg/L as CaCO
3
Magnesium above 40000 mg/L as CaCO
3
Ferrous iron above 100 mg/L