ISO 3177:1975

Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method ISO 3177:1975

Publication date:   Mar 1, 1975

95.99 Withdrawal of Standard   May 27, 2002

General information

95.99 Withdrawal of Standard   May 27, 2002

ISO

ISO/TC 47 Chemistry

International Standard

71.060.40   Bases

Buying

Withdrawn

Language in which you want to receive the document.

Scope

Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50mg/kg the method specified in ISO 992 shall be used. The principle consists in quantitative displacement of the thiocyanate (SCN- ) ions of the mercury(II) thiocyanate by the cloride (Cl- ) ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red). Photometric measurement of the colour at a wavelength of about 450 nm.

Life cycle

NOW

WITHDRAWN
ISO 3177:1975
95.99 Withdrawal of Standard
May 27, 2002

REVISED BY

ABANDON
ISO/WD 3177