0 Items
My account
Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

ISO 3357:1975

Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method

Sep 1, 1975

General information

90.93     Nov 29, 2023

ISO

ISO/TC 47

International Standard

71.060.50  

French   English  

Buying

Published

Language in which you want to receive the document.

Scope

Based on hydrolysis of a test portion by prolonged boiling in the presence of hydrochloric acid. Precipitation of the phosphate ions in the form of quinoline phosphomolybdate in the presence of acetone. Filtration by means of a filter crucible, washing, drying and weighing of the precipitate.

Life cycle

NOW

PUBLISHED
ISO 3357:1975
90.93 Standard confirmed
Nov 29, 2023