Hanna Instruments HI 83099 User Manual

Page 46

• Reinsert the cuvette into the instrument.

• Press

Timer and the display will show the countdown prior to the measurement or, alternatively, wait

for 6 minutes and press

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

displays concentration in

mg/L of nitrite.

• Press ▲ or ▼ to access the second level functions.
• Press the

Chem Frm key to convert the result in mg/L of nitrogen-nitrite (NO

¯-N) and sodium nitrite

(NaNO

• Press ▲ or ▼ to return to the measurement screen.

INTERFERENCES

Interference may be caused by the following ions:
ferrous, ferric, cupric, mercurous, silver, antimonious, bismuth, auric, lead, metavanadate and chloroplatinate.
Strongly reducing and oxidizing reagents.
High levels of nitrate (above 100 mg/L) could yield falsely high readings due to a minute amount of
reduction to nitrite that could occur at these levels.

Nitrite LR

SPECIFICATIONS

Range

0.00 to 1.15 mg/L

Resolution

0.01 mg/L

Accuracy

±0.06 mg/L ±4% of reading at 25 °C

Typical EMC

±0.01 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 525 nm

Method

Adaptation of the

EPA Diazotization method 354.1. The reaction between nitrite and

the reagent causes a pink tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93707-0

Powder reagent

1 packet

REAGENT SETS

HI 93707-01 Reagents for 100 tests
HI 93707-03 Reagents for 300 tests
For other accessories see page 132.

MEASUREMENT PROCEDURE

• Select the

Nitrite LR method using the procedure described in

the

Method Selection section (see page 12).

• Fill the cuvette up to the mark with 10 mL of unreacted

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.

• Remove the cuvette.

• Add the content of one packet of HI 93707-0 reagent.

Replace the cap and shake gently for about 15 seconds.

Nitrite LR

NITRITE LOW RANGE

10 mL