Hanna Instruments HI 84529 - Manual (Page 8)

www. hannainst .com 8 Description
In an ideal solution, the endpoint of an acid titration corresponds
stoichiometrically to the complete neutralization of the acids present.
This endpoint for this reaction can be determined visually using a color
indicator (i.e. phenolphthalein), however this endpoint becomes very
objective in opaque and colored samples. The HI 84529 removes this issue
by titrating to a fixed pH endpoint that can be set by the user. The HI 84529
can be customized to meet individual needs with samples titrated by mass or
by volume, in two different ranges, with diluted and non diluted (low range
only). For precise analysis the sample size, volume of titrant added and titrant
concentration must be known.
The HI 84529 Titratable Acid in Dairy Products Minititrator utilizes a simple
sample preparation, a high quality dosing pump for titrant additions,
potentiometric endpoint determination and instantaneous computations.
To maintain the high accuracy of the minititrator a simple pump calibration
is required. The pump calibration uses a known quantity of a known solution
to compensate for changes in the dosing system, this procedure should be
performed regularly.
Principle of
Operation