Hanna-instruments HI 83212 Manual de usuario descargar pdf (Pagina 20)

38 39

Phosphate LR

• Reinsert the cuvette into the instrument.

• Press TIMER and the display will show the countdown prior to the

measurement or, alternatively, wait for 3 minutes and press READ.

When the timer ends the meter will perform the reading. The

instrument displays concentration in mg/L of phosphate (PO

• Press the s or t 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 s or t to go back to the measurement screen.

INTERFERENCES

Interference may be caused by:

Iron above 50 mg/L

Silica above 50 mg/L

Silicate above 10 mg/L

Copper above 10 mg/L

Hydrogen sulfide, arsenate, turbid sample and highly buffered samples also interfere.

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 50.

MEASUREMENT PROCEDURE

• Select the

Phosphate LR

method using the procedure de-

scribed 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

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 26 27

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