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  Acidity in Catsup
 Log #184B Titration Application Note
 Acidity of food products was determined using the first derivative titration technique with an Orion combination Ross Sure-Flow pH electrode.  Using sodium hydroxide in the sample reagent as the titrant.  The Orion 960 Autochemistry System determines the endpoint and calculates the acidity of the sample.  Ketchup was an example of a food product that was analyzed with a single reagent for both sodium and acidity.