Hanna Instruments HI 4010 User Manual
HI 4110
FLUORIDE
COMBINATION
HI 4010
FLUORIDE
Instruction Manual
HI 4010HI 4010
HI 4010
HI 4010HI 4010
HI 4110HI 4110
HI 4110
HI 4110HI 4110
Fluoride Ion
Selective Electrode
Half-cell
Combination
1
HI 4010 Fluoride Half-cellHI 4010 Fluoride Half-cell
HI 4010 Fluoride Half-cell
HI 4010 Fluoride Half-cellHI 4010 Fluoride Half-cell
HI 4110 Fluoride Combination ElectrodeHI 4110 Fluoride Combination Electrode
HI 4110 Fluoride Combination Electrode
HI 4110 Fluoride Combination ElectrodeHI 4110 Fluoride Combination Electrode
I. I.
Introduction:Introduction:
I.
Introduction:
I. I.
Introduction:Introduction:
The Hanna HI 4010 and HI 4110 are ion selective electrodes designed for the measurement of fluoride ions in
aqueous solutions. The HI 4010 is a solid state half-cell
sensor that requires a separate reference. The HI 4110 is a
combination ion selective electrode.
IIII
SpecificationsSpecifications
II.
Specifications
IIII
SpecificationsSpecifications
Type: Solid State electrode with
a Lanthanum Fluoride
crystal membrane.
Ion(s) measured: Fluoride (F-)
Measurement range: Saturated to 1X 10-6M
Saturated to 0.02 ppm
Interfering ions: OH
Note:
Several other ions (Al3+, Fe3+) that complex with the
measured species will reduce the ion concentrations
measured directly. TISAB reagent should be used in most of
these cases. H+ ion also forms HF species below pH 5.
Increase pH in these cases above 5 for a total fluoride
measurement.
Operating Temperature: 0-80°C
-
Operating pH: 5 to 8 pH
Dimensions: 12 mm (OD) X 120 mm
nominal insertion
(0.47” X 4.72”)
Connection: BNC
2
III. III.
Theory of OperationTheory of Operation
III.
Theory of Operation
III. III.
Theory of OperationTheory of Operation
::
:
::
The HI 4010 or HI 4110 fluoride electrodes are potentiometric devices used for the rapid determination of free fluoride ions in water, soft drinks, wine, emulsified foods, and
plating and pickling acids. The electrode functions as a
sensor or ionic conductor. The HI 4010 requires a separate
reference electrode to complete its electrolytic circuit. The
HI 4110 has a reference electrode incorporated in its design. The lanthanum fluoride crystalline pellet is practically insoluble in the test solutions being measured and
produces a potential change due to changes in the sample’s
ion activity. When the ionic strength of the sample is fixed,
the voltage is proportional to the concentration of fluoride
ions in solution and the electrode follows the Nernst equation.
E= E
+ 2.3 RT/nF log A
a
ion
E= observed potential
Ea= Reference and fixed internal voltages
R= gas constant (8.314 J/K Mol)
n= Charge on ion (1-)
A
=ion activity in sample
ion
T= absolute temperature in K
F= Faraday constant (9.648 x 10
3
4
C/equivalent)
IV. IV.
Design elements of the HI 4010 and HI 4110Design elements of the HI 4010 and HI 4110
IV.
Design elements of the HI 4010 and HI 4110
IV. IV.
Design elements of the HI 4010 and HI 4110Design elements of the HI 4010 and HI 4110
electrodeselectrodes
electrodes
electrodeselectrodes
Cap
HI 4010
RIDE
Sensor
FLUO
Handle
Sensing
Crystal
Upper Cap
Upper
Threads
O-Ring
Ceramic Junction
on Inner Stem
Liquid junction
Spring
Fill Hole
O-Ring and
Plug
Outer Sleeve
Sensing
Crystal
4
V. V.
Equipment requiredEquipment required
V.
Equipment required:
V. V.
Equipment requiredEquipment required
• Hanna HI 5315 double junction reference electrode
with HI 7075 fill solution for measurements with
HI 4010.
• Hanna HI 4222 pH/ISE/mV meter or other suitable
ion or pH/mV meter. (Note: log/linear graph paper is
useful if an ISE (ion) meter is not available.
• Hanna HI 180 magnetic stirrer or equivalent with
stirring bars (HI 731320). (Note: isolate beakers from
stirrer motor heat by placing insulating material such
as foam or cork between them).
• Hanna HI 76404 electrode holder or equivalent.
• Plastic beakers (HI 740036P) or other suitable mea-
surement vessel.
VI. VI.
Solutions RequiredSolutions Required
VI.
Solutions Required
VI. VI.
Solutions RequiredSolutions Required
Standard for Fluoride Measurements
Select appropriate Hanna Instruments standard and ISA
from the list below: Part number
0.1 M Sodium Fluoride, 500 mL HI 4010-01
100 ppm, 500 mL HI 4010-02
1000 ppm, 500 mL HI 4010-03
10 ppm with TISAB II, 500 mL HI 4010-10
1 ppm with TISAB II, 500 mL HI 4010-11
2 ppm with TISAB II, 500 mL HI 4010-12
*
*
*
ISA
TISAB II, 500 mL HI 4010-00
TISAB II, 1 gallon HI 4010-05
TISAB III , 500 mL HI 4010-06
KIT: HI 4010-30
Contains four 500 mL bottles of:
TISAB II HI 4010-00
10 ppm with TISAB II HI 4010-10
1 ppm with TISAB II HI 4010-11
Standards that are asterisked contain TIASB II and are
*
ready to use withour further additions.
5
*
*
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