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GB/T 6369-2008 English PDF (GBT6369-2008)

GB/T 6369-2008 English PDF (GBT6369-2008)

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GB/T 6369-2008: Surface active agents -- Determination of emulsifying power -- Colorimetric method

This Standard specifies the method for determination of emulsifying power of surface active agents using colorimetric method. This Standard applies to the determination of emulsifying power of effluent oil treatment agents.
GB/T 6369-2008
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.100.40
G 72
Replacing GB/T 6369-1986
Surface active agents - Determination of
emulsifying power - Colorimetric method
ISSUED ON: APRIL 01, 2008
IMPLEMENTED ON: OCTOBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Principle ... 4
3 Reagents ... 4
4 Instruments and equipment ... 4
5 Determination ... 5
6 Determination results ... 7
7 Test report ... 7
Foreword
This Standard replaces GB/T 6369-1986 ?€?Surface active agents -
Determination of emulsifying power - Colorimetric method?€?.
The main differences between this Standard and the previous version:
- ADD the foreword.
- ADD a Clause on instruments and equipment (see Clause 4).
- ADD a Clause on test report (see Clause 7).
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of National Technical Committee on Chemical Industry Surfactants of Standardization Administration of China. Drafting organizations of this Standard: Shanghai Dyestuff Research Institute Co., Ltd., Zhejiang Huangma Chemical Group.
Drafters of this Standard: Zhuang Yongbin, Wang Weisong, Meng Zhaoping. This Standard was first issued in 1986.
Surface active agents - Determination of
emulsifying power - Colorimetric method
1 Scope
This Standard specifies the method for determination of emulsifying power of surface active agents using colorimetric method.
This Standard applies to the determination of emulsifying power of effluent oil treatment agents.
2 Principle
The emulsifier and the oil with color are thoroughly mixed at a certain ratio, then added to water, and shaken to form an emulsion. After standing until the layers are formed, the oil in the emulsified layer is extracted with a solvent. Determine the optical density value of the extract. Find the corresponding amount of emulsified oil from the working curve, and calculate the emulsifying power. 3 Reagents
3.1 Trichloromethane: chemically pure.
3.2 Fuel oil: (marine internal combustion engine fuel oil) viscosity of 100 mPa ?? s ~ 500 mPa ?? s, density (20 ??C) of 0.8872 g/cm3.
3.3 Distilled water: pH 7 ~ 8.
3.4 Anhydrous sodium sulfate: chemically pure.
4 Instruments and equipment
4.1 Spherical separatory funnel: capacity of 60 mL.
4.2 Pipette: 10 mL, 20 mL, 25 mL.
4.3 Volumetric flask: 25 mL, 50 mL, 100 mL.
4.4 Graduated beaker: capacity of 50 mL.

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