162
8.51. PHOSPHATE, MARINE ULTRA LOW RANGE
SPECIFICATIONS
Range
0 to 200 µg/L (as P)
Resolution
1 µg/L
Accuracy
±5 µg/L ±5% of reading at 25 °C
Light Source
LED with narrow band interference filter @ 610 nm
Method
Adaptation of the Standard Methods for the Examination of Water and
Wastewater, 20th edition, Ascorbic Acid method.
REQUIRED REAGENTS
Code
Description Quantity
HI736‑25
Phosphorus Ultra Low Range Reagent
1 packet
REAGENT SETS
HI736‑25
Reagents for 25 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the
Phosphate Marine ULR
method
using the procedure described in the Method Selection
section (see page 18).
• Rinse, cap and shake the cuvette several times with
unreacted sample.
• Fill the cuvette with 10 mL of sample (up to the
mark) and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press the
Zero
key. The display will show “‑0.0‑” when the meter is zeroed and ready for
measurement.
• Add one packet of
HI736‑25
Phosphorus Ultra Low
Range Reagent. Replace the cap and shake gently
(for about 2 minutes) until the powder is completely
dissolved.
10 mL
PHOSPHA
TE
, MARINE UL
TRA LOW
RANGE