Hanna-instruments HI 903 Bedienungsanleitung PDF herunterladen (Seite 73)

5-9

METHODS

5.5.4 Predispensing Amount

The titration time can be shortened by adding a large fraction of the titrant at the start of the

analysis, if the approximate water content of the sample is known.

The predispensing amount can be set to deliver between 1 and 90% of the titrant required

to reach the end point.

Setting the amount to 0% will disable the titrant predispensing feature.

5.5.5 Pre-Analysis Stir Time

To avoid erroneous results or unreacheable endpoints when analyzing samples with limited

solubility, the sample must be completely dissolved in the solvent prior to the start of a

titration.

The pre-analysis stir time can be set between 0 and 1000 seconds. After the sample is added

to the reaction vessel the titrator will stir for the set period of time before any titrant (excluding

predispensing) is added to the cell.

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Hanna-instruments HI 903 Bedienungsanleitung Seite 73