Hanna-instruments HI 83208-2008 Manual de usuario descargar pdf (Pagina 30)

58 59

Phosphate LR

PHOSPHATE LOW RANGE

SPECIFICATIONS

Range 0.00 to 2.50 mg/L

Resolution 0.01 mg/L

Accuracy ±0.04 mg/L ±4% of reading

Typical EMC Dev. ±0.01 mg/L

Light Source Tungsten lamp with narrow band interference filter @ 610 nm

Method Adaptation of the Ascorbic Acid method. The reaction between phosphate and the

reagent causes a blue tint in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93713-0 Powder reagent 1 packet

REAGENT SETS

HI 93713-01 Reagents for 100 tests

HI 93713-03 Reagents for 300 tests

For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Phosphate LR

method using the procedure

described in the

Method Selection

section (see page 12).

• 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 ZERO key. The display will show “-0.0-” when the meter is

zeroed and ready for measurement.

• Remove the cuvette and add the content of one packet of

HI 93713-0 reagent. Replace the cap and shake gently

(for about 2 minutes) until the powder is completely

dissolved.

10 mL

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

• Press the  or  to access the second level of functions.

• Press the Chem Frm functional key to convert the result in mg/L of phosphorus (P) and phosphorus

pentoxide (P

• Press the  or  to go back to the measurement screen.

INTERFERENCES

Sulfide

Chloride above 150000 mg/L )

Calcium above 10000 mg/L as CaCO

Magnesium above 40000 mg/L as CaCO

Ferrous iron above 100 mg/L

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