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 2174:1990

Surface active agents — Preparation of water with known calcium hardness

Apr 5, 1990

General information

90.20     Apr 15, 2026

ISO

ISO/TC 91

International Standard

71.100.40  

French   English  

Buying

Published

Language in which you want to receive the document.

Scope

A stock solution is prepared by dissolving an appropriate quantity of calcium chloride in water. The calcium content of this stock solution is determined by complexometric titration with the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA) using a mixture of Mordant Black 11 (C.I. 14645) and methyl red as indicator. Dilute solutions of the hardness required are prepared by dilution of appropriate volumes of the stock solution.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 2174:1979

NOW

PUBLISHED
ISO 2174:1990
90.20 Standard under periodical review
Apr 15, 2026

National adoptions

SRPS ISO 2174:1993  
ISS

Surface active agents — Preparation of water with known calcium hardness

90.20   Standard under periodical review

H091 more

Preview

To view the full content, you need to register or to log in to your account by clicking on the "Log in" button

Login