ISO 2998:1974
Sodium tripolyphosphate and sodium pyrophosphate for industrial use; Determination of orthophosphate content; Photometric method using the reduced molybdophosphate

Standard No.

ISO 2998:1974

Release Date

1974

Published By

International Organization for Standardization (ISO)

Status

Be replaced 1994-01

Replace By

ISO 2998:1994

Latest

ISO 2998:1994

Scope

Specifies a photometric method, using the reduced molybdophosphate, for the determination of orthophosphate content of sodium tripolyphosphate and sodium pyrophosphate for industrial use. Applicable to products with orthophosphate contents between 0, 05 and 1, 0 % (m/m).

ISO 2998:1974 history

• 1994 ISO 2998:1994 Sodium tripolyphosphate and sodium pyrophosphate for industrial use; Determination of orthophosphate content; Photometric method using the reduced molybdophosphate
• 1974 ISO 2998:1974 Sodium tripolyphosphate and sodium pyrophosphate for industrial use; Determination of orthophosphate content; Photometric method using the reduced molybdophosphate