title: The effect of orthophosphate on the gravimetric determination of pyrophosphate.
abstract: The effect of orthophosphate on the precipitation of zinc pyrophosphate has been examined and it is shown that co-precipitation of the orthophosphate at pH 3.4-3.6 is serious if the orthophosphate concentration is >0.02M. Even with lower concentrations an error of up to +2% may occur.
authors.affiliation: Chemico-Technological Institute Sofia 56, Darvenitza Bulgaria.
authors.forename: P
authors.initials: P
authors.lastname: Bozadziev
authors.forename: M
authors.initials: M
authors.lastname: Georgieva
authors.forename: L
authors.initials: L
authors.lastname: Ilcheva