Hanna Instruments HI 4010 User Manual

Page 15

Five mL acetate buffer (3.7 M HOAC/0.76M 0AC

composition) is added to 100 mL of sample. A standard
aluminum solution is first titrated with a fluoride solution
to determine the endpoint value. Measurements may be
automated by use of the Hanna Titrator HI 901 or titrated
manually.

XIII.

XIII.
The HI 4110 and HI 4010 sensors measure fluoride ions
between 5 and 8 pH.

XIV.

XIV. Storage and Care of the HI 4010 and

Storage and Care of the HI 4010 and

HI 4110 sensors

The HI 4010 sensor can be stored in standards near
measured values for short periods of time and should be
stored dry with the protective cap on when not in use for
long periods of time. The model HI 4110 combination
electrode can be left in standards that were used for
calibration for short time periods. If the electrode will be
used frequently and needs to be ready for use, take measures
to prevent evaporation of fill solution. Top off fill solution,
and replace o-ring and plug on fill hole opening. Place
sensor tip in a dilute fluoride standard, positioned upright.
Prior to use, drain electolyte chamber and refill with fresh
fill solution.
For long term storage, the electrode should be drained,
disassembled and washed of salts with deionized water.
Wrap the ceramic junction in Parafilm® or other sealing
wrap. Unscrew the fluoride module and store dry in the
shipping vial. Store disassembled electrode in storage box
provided with electrode.

XV.

For F

-----

Multiply by

Moles/Liter (M) to ppm (mg/L)

1.900 x 10

ppm (mg/L) to M (Moles/Liter)

5.263 x 10

-5

Conversion tables

This manual is related to the following products:

HI 4110