APA6000 Alkalinity Reagent 1-Acid Titrant-1LThe APA6000 Alkalinity Process analyzer uses five reagents each of which is supplied in a 1L bottle designed to provide reagents for 30 days of continuous use APA Alkalinity Reagent 1 (2826153) is an acid titrant that reacts with the alkalinity in the sample APA Alkalinity Reagent 2 (2696653) is an indicator used to determine the endpoints of the titration APA Alkalinity Standards 1 and 2 (6001100) are used together to perform a multiple point calibration The fifth reagent APA Alkalinity Cleaning Solution (2697053) cleans the system during the Prime and Instrument Clean functions