Camlab TRUEscience ION Iodide ISE Instruction Manual

Some More Hints
Ensure that the temperature of all standards and
samples are the same to reduce errors.
Using a magnetic stirrer for laboratory analysis is
recommended but not essential. It is however
important to ensure the solution is homogeneous and a
stirrer will help to achieve this.
NOTE: DO NOT stir during measurements.
Prior to sample measurement ensure that the
electrode is thoroughly rinsed with deionised water.
It is worth performing this rinse twice given the
possibility of carryover being greatest in high
concentration solutions. Before reading sample values it is
a good idea to rinse with sample in a seperate beaker.
Prepare standards by serial dilution.
Make sure your electrode is conditioned by leaving
the tip in the lowest concentration standard for 1
hour prior to analysis.
Methods of Analysis
Direct Potentiometry is described under 'Operation'.
This method is simplified by using a direct reading ion
meter. There are several other methods, which are
useful.
Known Addition: An incremental technique where
the potential of the sample solution is measured
followed by addition of a small volume of a higher
concentration standard solution.
Sample Addition: An incremental technique where
the potential of a dilute standard solution is
measured followed by the addition of a small volume
of more concentrated sample. .
End Point Titration: ISE's are ideal end point
indicators and will produce a significant potential
change at the equivalence point. The Ion in question
must be contained in the titrand or the titrant and
must therefore be in excess or absence at the end point.
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Specifications
Overall length 155 mm
Body Diameter 12 mm
Cap Diameter 16mm
Connector S7 Male
Resistance at 25°C < 2.5 Meg Ohm
Concentration Range 0.6 to 127,000 ppm
Slope -54 to -59 mV/decade
Potential Drift Operating 1 mV per day
pH range 2 to 12
Temperature range 5 to 50°C
Endpoint time Typically 10 to 30 seconds
Interferences: Ions with
coefficients above 0.001 Sulphide and Cyanide
S7 male connector can be connected directly to the
TRUEscience cap or used with an adapter cable for
other meters using a S7 Female connector
See our website for details.
The TRUEscience cap is ideal for measuring up to six different parameters at
the same time. It simply clips onto your beaker and can measure pH,
Redox,Dissolved oxygen or specific ions simultaneously on an Android Tablet
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1141001 - Iodide ISE
Instruction Manual
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