Hanna Instruments HI 83208-2008 User Manual

Page 16

Fluoride

FLUORIDE

SPECIFICATIONS

Range

0.00 to 2.00 mg/L

Resolution

0.01 mg/L

Accuracy

±5% of reading

Typical EMC

±0.01 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 575 nm

Method

Adaptation of the

Standard Methods for the Examination of Water and Wastewater,

edition, SPADNS method. The reaction between fluoride and the liquid reagent

causes a red tint in the sample.

REQUIRED REAGENT

Code

Description

Quantity

HI 93729-0

SPADNS Reagent

4 mL

REAGENT SETS

HI 93729-01 Reagents for 100 tests
HI 93729-03 Reagents for 300 tests
For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Fluoride method using the procedure described in

the

Method Selection section (see page 12).

• Add 2 mL of HI 93729-0 SPADNS reagent to two cuvettes.

• Fill one of the cuvettes with distilled water up to the mark, replace

the cap and invert several times to mix.

• Fill the other cuvette with sample up to the mark, replace the cap

and invert several times to mix.

• Place the cuvette with the reacted distilled water (# 1) into the

holder and close the lid.

10 ml

# 1

# 2

2 ml

# 1

Copper LR

• Remove the cuvette.

• Add the content of one packet of HI 93747-0 Bicinchoninate.

Replace the cap and shake gently for about 15 seconds.

• Reinsert the cuvette into the instrument.

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

the measurement or, alternatively, wait for 45 seconds and press
READ. When the timer ends the meter will perform the reading.

• The instrument displays the results in mg/L of copper.

INTERFERENCES

Interference may be caused by:

Silver

Cyanide

For samples overcoming buffering capacity of reagent (around pH 6.8), pH should be adjusted between 6
and 8.