Abstract
The goal of the study is to develop methods for determination of the active components in acidic and alkaline detergents of complex composition. The objects of analysis are acidic (KATELON 202 – 208) and alkaline (KATELON 111 – 115) detergents of complex composition, which, in addition to easily detectable components (KOH and/or NaOH, HNO3, and H3PO4), contain weak organic acids (lactic, glycolic, acetic), including polybasic acids — aminotrimethylenephosphonic and diethylenetriaminepenta (methylenephosphonic) acids or salts — tetrasodium salt of glutamic acid N,N-diacetate, trisodium salt of methylglycine diacetic acid. An acid-base potentiometric titration was carried out for each of the listed objects and calculation formulas were derived to determine the concentration of the active substances (except for KATELON 115) in terms of nitric or phosphoric acid for acidic detergents or sodium or potassium hydroxide for alkaline detergents, respectively. A specific titration procedure (with indication of the sample weight, the pH value at the end of titration and corresponding calculation formula) is given in the application data sheet for each detergent along with the metrological characteristics of the methods.
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