GB/T 11991-2008Determination of reversible swelling of exchange resins (English PDF)

Foreword

This standard replaces GB/T 11991-1989 "Determination of the ion exchange resin Swelling." Compared with GB/T 11991-1989, this standard text, etc. made editorial changes. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee plastic universal methods and products Club (SAC/TC15/SC4) centralized. This standard is mainly drafted by: Xi'an Thermal Power Research Institute, the National Quality Inspection Center of synthetic resin, East Zibo Chemical Co. Shares Company Su Qing water treatment engineering company, Zhejiang Industrial Co., Ltd. to win glory. The main drafters of this standard. Wang Guangzhou-Zhuhai, Di Jinghua, Wang Jiandong, Peng Zhang Hua, Qian Ping, Shen Jianhua. This standard replaces the standards previously issued as follows:

--- GB/T 11991-1989. Swelling resin ion exchange Determination

1 Scope

GB/T 11991-2008 is the Chinese national standard on determination of reversible swelling of exchange resins, in the field of rubber and plastic industries. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 30 June 2008 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 February 2009. Classification: ICS 83.080.01, CCS G31. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the determination of the ion exchange resin from an ion patterns becomes another ion patterns change in volume method. This standard applies to all types of ion exchange resins Swelling was measured. For more weak type resin containing groups, according to weak-Tree Fat was measured.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 5475 sampling ion exchange resin Resin pretreatment method

GB/T 5476 ion exchange Determination of exchange capacity of the resin

GB/T 5760 OH anion exchange Laboratory use specifications and test methods GB/T 6682 Analysis

3 Method Summary

Repeatedly treated with acid solution to eliminate resin irreversible after expansion, it will turn into a single ionic resin. Strong resin washed with pure water tree Lipid particles of the external acid or base. Salt form weak acid type resin was washed with corresponding low concentration of alkali solution, so that they end up in (0.005 ~ 0.01) mol/acid, alkali solution L, the volume of the resin was measured irregularly arranged in a graduated cylinder, according to the resin in different ionic under volume Swelling count.

4 Instruments and equipment

4.1 Glass-exchange column. with GB/T 5760.

4.2 funnel. with GB/T 5760.

4.3 cylinder. 50.0mL.

5 Reagents and solutions

5.1 hydrochloric acid solution [Ba (HCl) = (1.00 ± 0.01) mol/L]. pure chemical formulation.

5.2 solution of sodium hydroxide [Ba (NaOH) = (1.00 ± 0.01) mol/L]. pure chemical formulation. Hydrochloric acid solution was washed with 5.3 [Ba (HCl) = (0.005-0.01) mol/L]. pure chemical formulation.

5.4 sodium hydroxide washing solution [Ba (NaOH) = (0.005-0.01) mol/L]. pure chemical formulation.

5.5 Reagent water. Reagent meet three water GB/T 6682 regulations.

6 Sample preparation

6.1 Sampling by GB/T 5475 carried out.

6.2 Pretreatment of the sample according to GB/T 5476 carried out.

6.3 taking about 25mL sample into a glass column exchange within the sample layer should be no air bubbles (if any air bubbles out of the agitation with a glass rod). Sample layer The retention level (4 ~ 5) cm.