What are the things that need to be known in advance to getting an AT1000 for Total Acid Number (TAN)?
Notes on TAN method for AT1000.
The application note for the TAN method should be reviewed, it covers the majority of the information on this application. This method is based on ASTM D664, which should be reviewed as well for additional information.
These are the important notes on this method that should be known before the application is purchased:
Hach does not sell all of the reagents needed to run this application. Hach sells the Isopropyl Alcohol, 500 mL (Product # 1445949) and the Chloroform, 500 mL (Product # 1445849) , but in reviewing the electrodes and reagents section at the top of the method there are several other things that would be needed. These would have to be sourced though another supplier.
Much of the setup and prep will be in mixing the reference filling solution, the titrant, and the solvent (also the basic buffer if the sample requires end point instead of inflection point. The necessity of this is needed determined after a sample analysis is performed [see info on section 5]).
The titrant is not very stable so a periodic titrant calibration is be recommended.
Sample amount is by weight in this application, so an analytical balance is also required. The sample amount is entered at the beginning of the run.
Because of compatibility issues with the solvents used in the application, the sample changers cannot be used with this method.