Alkalinity as ammonia

OELCHECK test instrument: Metrohm 855 Robotic Titrosampler
Sample volume: 20 ml
Unit: % (m/m)
Test result: Determination of the alkalinity of AdBlue, calculated as ammonia.
Result range: 0,1% - 0,5%
Analysis for: AdBlue
Brief description: The sample to be analyzed is diluted with water and then titrated with hydrochloric acid until pH 5.7 is reached. Based on the consumed amount of hydrochloric acid solution and the used weight of AdBlue, the result of the alkalinity, related to ammonia, is calculated in mass percent.
Statement: The determination of alkalinity is an essential quality criterion for the release of AdBlue according to ISO 22241-1.
Underlying test standard: ISO 22241-2 Annex D