GB 12005.2-1989

Polyacrylamide solid content determination method (English Version)

Standard No.

GB 12005.2-1989

Language

Chinese, Available in English version

Release Date

1989

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB 12005.2-1989

Scope

This standard specifies the method for determining the solid content of powdered and colloidal polyacrylamide. This standard is applicable to the determination of the solid content of powdered and colloidal polyacrylamide produced by different polymerization methods.

Introduction

Core Technology Analysis and Standard Implementation Specifications

Parameter Type	Powdered Sample	Colloidal Sample
Sampling Weight	0.6-0.8g	0.4-0.6g
Drying Time	5 hours	4 hours
Weighing System Error	≤1%	≤5%

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Instrument system requirements

Key testing equipment includes: weighing bottle (inner diameter 40mm), polyester film (0.1mm thickness), vacuum oven (5300Pa vacuum degree), etc.

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Error control strategy

When the sample quality fluctuation exceeds powder ±1%/gel ±5%, the following must be performed:
①Sampling environment temperature and humidity verification
②Balance calibration re-verification
③Three-order review mechanism for sample pretreatment verification

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Engineering practice case

A water treatment chemical factory established a graded temperature control system:
105℃ main drying area→80℃ slow-release cooling area→dryer balance area, which increased batch detection efficiency by 40% and reduced RSD to 0.3%

GB 12005.2-1989 history

• 1989 GB 12005.2-1989 Polyacrylamide solid content determination method

GB 12005.2-1989 -All Parts