Hanna Instruments HI934 Bedienungsanleitung Seite 137

Non-aqueous
A solution that does not contain water.
Non-aqueous Titration
A titration that is performed in non-aqueous solutions. Typically used to titrate very weak acid and bases to eliminate
the leveling effect water has on all acids and bases dissolved in it.
Normal
The concentration of a solution which accounts for any stoichiometric difference between the various species in a solution.
Oxidation/ Reduction Potential (ORP)
A voltage generated in a solution which is a result of the ratio of the oxidized to reduce species. Typically measured
potentiometrically with an ORP sensor.
Oxidant
The species that is accepting electrons in a redox reaction.
Pipette
Scientific apparatus that is used to deliver precise volumes of liquids.
Polyprotic Acid
Acids that are capable of donating more than one proton per acid molecule.
Potentiometric Titration
A titration in which the endpoint is determined by monitoring the voltage of the solution using an electrode.
Precipitation Titration
A titration in which the analyte reacts with the titrant to form an insoluble compound. The endpoint is typically detected
with an ISE sensitive to either the analyte or titrant.
Reagent
The chemical added in a titration that causes the given reaction to occur.
Reduction-Oxidation Reaction (redox)
A chemical reaction in which the atoms involved in the reaction have their oxidation numbers changed. Reduction is the
gain of electrons, which decreases the oxidation number. Oxidation is the loss of electrons, which increases the oxidation
number.
Reductants
The electron donor in a redox reaction.
Reference Electrode
An electrode that supplies a constant electrode potential. It is used in combination with an "indicator" electrode,
allowing for the "indicator" electrode potential to be measured.
Relative Standard Deviation (RSD)
A measure of the amount of relative variation in a set of data. It is calculated by dividing the standard deviation by the mean:
RSD = (Standard Deviation of X) * 100 / (Mean of X)
Repeatability
The variation in sample measurements taken by a single person or instrument under the same conditions.
Spectrophotometric Titration
A titration in which the endpoint is marked by a change in the color and/or color intensity.
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