Hanna Instruments HI 83203-2008 User Manual

Page 16

Nitrate

• Replace the cap and immediately shake vigorously up

and down for exactly 10 seconds. Continue to mix by
inverting the cuvette gently for 50 seconds, while taking

care not to induce air bubbles. Powder will not com-
pletely dissolve. Time and way of shaking could sensitively
affect the measurement.

• Reinsert the cuvette into the instrument, taking care

not to shake it.

• Press TIMER and the display will show the countdown prior

to the measurement or, alternatively, wait for 4 minutes
and 30 seconds and press READ. When the timer ends
the meter will perform the reading. The instrument
displays the results in mg/L of nitrate-nitrogen.

• Press the or to access the second level of functions.
• Press the Chem Frm functional key to convert the result in mg/L of nitrate (NO

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

INTERFERENCES

Interference may be caused by:

Ammonia and amines, as urea and primary aliphatic amines
Chloride above 100 ppm

Chlorine above 2 ppm
Copper

Iron(III)
Strong oxidizing and reducing substances
Sulfide must be absent

Nitrate

SPECIFICATIONS

Range

0.0 to 30.0 mg/L

Resolution

0.1 mg/L

Accuracy

±0.5 mg/L ±10% of reading

Typical EMC

±0.1 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 525 nm

Method

Adaptation of the cadmium reduction method. The reaction between nitrate and the
reagent causes an amber tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93728-0

Powder reagent 1 packet

REAGENT SETS

HI 93728-01 Reagents for 100 tests
HI 93728-03 Reagents for 300 tests
For other accessories see page 46.

MEASUREMENT PROCEDURE

• Select the

Nitrate method using the procedure described in

the

Method Selection section (see page 11).

• Using the pipette, fill the cuvette with 6 ml of sample, up

to half of its height, 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 93728-0 reagent.

6 mL

NITRATE