The methodology for titratable acidity in dairy products is based on a neutralization reaction of the acids in a sample (i.e. lactic acid) with a base (i.e. sodium hydroxide) to produce water:
H++OH– → H2O
In an ideal solution, the endpoint of an acid titration corresponds stoichiometrically to the complete neutralization of the acids present. The 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 such as milk. The HI84429 removes this issue by titrating to a fixed pH endpoint that is potentiometrically determined by the FC260B half cell pH electrode and HI5315 half cell reference electrode.
The HI84429-50 is a 100 mL bottle of alkaline titrant solution used for the determination of lactic acid in dairy products.
Replacement reagents required to operate the HI84429:
Product Part #
Pump calibration standard