GB/T 6324.3-2011Test method of organic chemical products -- Part 3: Determination of permanganate-reducing substances (English PDF)

Foreword

GB/T 6324 Test method of organic chemical products consists of six parts.

- Part 1.Water miscibility test of liquid organic chemical products;

- Part 2.Determination of dry residue after evaporation on a water bath for

volatile organic liquids;

- Part 3.Determination of permanganate-reducing substances;

- Part 4.Determination of trace sulfur in organic liquid products -

Microcoulometric method;

- Part 5.Determination of trace quantities of carbonyl compounds in

organic chemicals;

- Part 6.Determination of color for liquids - Tristimulus colorimetry.

This Part is the third part of GB/T 6324.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 6324.3-1993 Organic chemical products for industrial

use - Test method for the determination of permanganate-reducing substances.

Compared with GB/T 6324.3-1993, the main technical changes are as follows.

- modified Standard's name;

- modified the reagents used to prepare standard colorimetric solutions

(see 3.3.2.2 of this Edition, 3.1.2.2 of Edition 1993);

- modified the observation way in the analysis procedure from axial

observation to axial or lateral observation (see 3.3.4 of this Edition, 3.1.2.2

of Edition 1993);

- deleted the recommended ratio table of standard colorimetric solution

used by part of products (see Table A.1 of Edition 1993).

This Part was redrafted on the basis of adopting ASTM D 1363.2006 Standard

Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension.

The degree of conformance with ASTM D1363.2006 is non-equivalent.

This Part was proposed by China Petroleum and Chemical Industry Association.

This Part shall be under the jurisdiction of Subcommittee on Organic, National

Technical Committee on Chemical of Standardization Administration of China

(SAC/TC 63 / SC 2).

Main drafting organizations of this Part. Beijing Research Institute of Chemical

Industry, China Petroleum & Chemical Corporation, SINOPEC Sichuan Vinylon

Works.

The drafting organizations of this Part. Jiangsu Thorpe (Group) Co., Ltd.,

Daqing Oilfield Methanol Plant, Sinopec Beijing Yanshan Company, Zhejiang

Jinju Chemical Co., Ltd., Shaanxi Yulin Natural Gas Chemical Industry Co., Ltd..

Main drafter of this Part. Guo Yanling, Pu Lijun, Zeng Yan.

This Part was issued in April 1986 for the first time and revised in December

1993 for the first time.

Test method of organic chemical products - Part 3.

Determination of permanganate-reducing substances

1 Scope

This Part specifies the visual colorimetric method and titration method used for

the determination of potassium permanganate in organic chemical products.

The visual colorimetric method of this Part is applicable to the determination of

of potassium permanganate in neutral, weakly acidic and weakly basic organic

chemical products. The titration method is applicable to organic chemical

products with potassium permanganate index equal to or greater than 10 mg /

100mL and which do not react with potassium permanganate under acidic

conditions.

2 Normative references

The following referenced documents are indispensable for the application of

this document. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any

amendments) applies.

GB/T 601 Chemical Reagent - Preparations of Standard Volumetric

Solutions

GB/T 603 Chemical Reagent – Preparations of Reagent Solution for Use

in Test (GB/T 603-2002, ISO 6353-1.1982, NEQ)

GB/T 3143 Color determination method of liquid chemicals (Hazen unit--

Platinum-cobalt scale)

3 Test method

3 water as specified in GB/T 6682 can be used in the analysis.

The standard titration solutions, preparations and products used in the analysis,

in the absence of any other indication, shall be prepared in accordance with the

provisions of GB/T 601 and GB/T 603.