This application note provides a complete solution to determine the insoluble matter content of AUS 32 according to ISO 22242 Annex G.
What Is AUS 32?
AUS 32 is used in diesel-fueled vehicles as additive to reduce the amount of air pollution and refers to a 32% aqueous urea solution. AdBlue® is the German Association of the Automotive Industry (VDA) trade name for AUS 32.
What Is ISO 22241?
AUS 32 can contain small insoluble particles that typically arise from insoluble impurities in urea. These particles can block the injection nozzle or accumulate and cover the solid catalyst in the selective catalytic reduction system. The international ISO 22241 standard provides a quality metric for AUS 32 solutions.
Method of Analysis
Determining the mass of the insoluble matter is the most crucial step of the application method. The insoluble matter of an AdBlue sample is filtered off using a glass fiber filter pad and a Büchner funnel. The mass difference between the clean filter pad and processed filter pad gives the mass of insoluble matter. An analytical balance is used to weigh the pads and a precision balance to weigh the sample. Both the balances are connected via the LabX™ laboratory software. This allows an automated calculation of the insoluble matter content via a combined LabX™ method.
This Application Note Includes
- Sample preparation and procedures
- Solutions and chemicals
- Chemistry
- Instruments and accessories
- Method in detail
- Results and remarks
Method files (.lmt) for direct import and implementation on the instrument are also included.
Download our free application note and benefit from our knowledge to accurately determine the insoluble matter content of AUS 32 in accordance with ISO 22242 Annex G.
 |
 |
