GB/T 6324.1-2004Test method of organic chemical products -- Part 1: Water miscibility test of liquid organic chemical products (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 first part of GB/T 6324.

This Part was redrafted on the basis of adopting the Standard of American

Society for Testing and Materials ASTM D 1722.1998 Standard Test Method for

Water Miscibility of Water-Soluble Solvents (English version). Annex A lists the

comparison on clause number between this Part and ASTM D 1722.1998.

Considering national conditions of China, this Part made some modifications

when adopting ASTM D 1722.1998.The technical differences are as follows.

- modified "1.9, the ratio of sample and water miscibility" specified in 3.1 of

ASTM D 1722.1998 to "select an appropriate ratio of sample to water

miscibility for different product sample" (Clause 7 of this Part) because

different products contain different impurities, the effect of the miscibility

of the sample with water shall be different, then it shall be inappropriate to

fix a ratio;

- modified "the test temperature is room temperature or other temperature

specially referred by the supplier and the buyer" specified in 1.3 of ASTM

D 1722.1998 to "the test temperature is (20±1)°C" (Clause 7 of this Part)

because temperature affects the solubility of substance then in order to

ensure the consistency of test conditions, this Part specifies the test

temperature.

This Part replaces GB/T 6324.1-1986 Organic chemical products for industrial

use--Standard test method for water miscibility.

Compared with GB/T 6324.1-1986, the main changes are as follows.

- added "Terms and definitions" and "Meaning and application of the

method" (see Clause 3 and Clause 5);

- modified the name of this Part from "Organic chemical products for

industrial use--Standard test method for water miscibility" to "Test method

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

organic chemical products" (see the cover);

- modified the ratio of sample to water immiscibility from "select the ratio of

sample immiscibility in water at 1.2, 1.3 or 1.4, or other specified ratio"

to "according to requirements for impurities insoluble in water in different

product samples and product specifications, select the appropriate ratio

of sample to water miscibility" (Clause 4 of Edition 1986, Clause 7 of this

Edition) [Translator NOTE. actually it is in Clause 8 of this Edition];

- modified the expression of test results from "sample measurement results

shall be expressed by clear or slightly turbid after the test sample is

miscible with distilled water" to "If the sample-water mixed solution is as

clear and bright or freed from mixed oil as the blank test solution, the

sample shall be reported as 'test passed'. If it is tested as unclear or oil-

mixed, it shall be reported as 'test failed'" (Clause 5 of Edition 1986,

Clause 9 of this Edition);

- specified that when this test method is used by product standard, "For

interpretation of "unclear or opaque" of different chemical products can be

specified in the product standard or the contract in advance" (see 5.3).

Annex A of this Part is informative.

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).

The drafting organization of this Part. Beijing Research Institute of Chemical

Industry, China Petroleum & Chemical Corporation.

Main drafter of this Part. Hu Yanfeng.

This Part was issued in April 1986 for the first time.

Test method of organic chemical products - Part 1.Water

miscibility test of liquid organic chemical products

1 Scope

This Part of GB/T 6324 specifies qualitative test method for impurities in water-

insoluble substances contained in liquid organic chemical products.

This Part is applicable to liquid organic chemicals that can be thoroughly mixed

with water in any proportion and maintain chemical stability.

2 Normative references

The following standards contain the provisions which, through reference in this

Part, constitute the provisions of this Part. For dated references, subsequent

amendments (excluding corrections) or revisions do not apply to this Part.

However, the parties who enter into agreement based on this Part are

encouraged to investigate whether the latest versions of these documents are

applicable. For undated reference documents, the latest versions apply to this

Part.

GB/T 6325-1994 Terminology of analysis for organic chemical product

3 Terms and definitions

For the purposes of this Part of GB/T 6324, the following terms and definitions

apply.

4 Method summary

According to a determined proportion, take a certain volume of sample into a

colorimetric tube. Add water to 100 mL.

5 Meaning and application of the method

6 Reagent

Water, GB/T 6682, Grade 3.

7 Apparatus

8 Test method

According to requirements for impurities insoluble in water in different product

samples and product specifications, select the appropriate ratio of sample to

water miscibility.

9 Expression of test results

If the sample-water mixed solution is as clear and bright or freed from mixed oil

as the blank test solution, the sample shall be reported as "test passed". If it is

tested as unclear or oil-mixed, it shall be reported as "test failed".

Annex A

(Informative)

Comparison on clause number between this Part and ASTM D 1722.1998

......