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GB/T 5549-2010: Surface active agents -- Determination of surface tension by drawing up liquid films
Status: Valid GB/T 5549: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5549-2010 | English | 229 |
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Surface active agents -- Determination of surface tension by drawing up liquid films
| Valid |
GB/T 5549-2010
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| GB/T 5549-1990 | English | 319 |
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Surface active agents--Determination of surface tension by drawing up liquid films
| Obsolete |
GB/T 5549-1990
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PDF similar to GB/T 5549-2010
Basic data | Standard ID | GB/T 5549-2010 (GB/T5549-2010) | | Description (Translated English) | Surface active agents -- Determination of surface tension by drawing up liquid films | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G72 | | Classification of International Standard | 71.100.40 | | Word Count Estimation | 10,186 | | Date of Issue | 2011-01-14 | | Date of Implementation | 2011-12-01 | | Older Standard (superseded by this standard) | GB/T 5549-1990 | | Quoted Standard | GB/T 6682 | | Adopted Standard | ISO 304-1985, NEQ | | Regulation (derived from) | National Standard Approval Announcement 2011 No.2 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the method used to determine the film pulled surfactant solution surface tension. This standard applies to surfactants, organic solvents and determination containing one or more surfactants and pure liquid mixture or solution surface tension. | GB/T 5549-2010: Surface active agents -- Determination of surface tension by drawing up liquid films
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Surface active agents. Determination of surface tension by drawing up liquid films
ICS 71.100.40
G72
National Standards of People's Republic of China
Replacing GB/T 5549-1990
Surface active agents up liquid films
Determination of surface tension
(ISO 304. 1985, NEQ)
Issued on. 2011-01-04
2011-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 5549-1990 "Determination of surfactant surface tension by drawing up liquid film method" and GB/T 5549-1990
Compared to the main changes are as follows.
--- Increasing the foreword;
--- Increasing the size of the ring and the ring schematic diagram illustrating measurement;
--- Increasing the test sections of the report.
The standards with international standards ISO 304. 1985 "surfactant determined by drawing up liquid films surface tension," the degree of non-conformity
Equivalent.
The standards with international standards ISO 304. 1985 of the main differences.
--- The ISO standard does not include a platinum - iridium wire stirrup-shaped ring method and rectangular thin platinum plate method;
--- Precision measurement differences (Chapter 9 precision).
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee Chemistry (specialty) surfactant Technical Committee (SAC/TC63/SC8) centralized.
This standard was drafted. Shanghai Dyestuffs Research Institute Co., Ltd., Liaoning Occitan Chemical Company.
The main drafters of this standard. Zhuangyong Bin, Liuzhao Bin, Huang Weiqing, Liu Weiqin.
The standard of previous editions.
--- GB/T 5549-1985, GB/T 5549-1990.
Surface active agents up liquid films
Determination of surface tension
1 Scope
This standard specifies the method used to measure up liquid films surfactant solution surface tension.
This standard applies to surface active agent, and an organic solution containing one or more surfactants and a mixture of pure liquid or solution
Determination of surface tension.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the edition are not applicable to the present
file. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Surface tension surfacetension
Along by the free liquid surface can cause the surface of the thoroughfare used in the force per unit length, the value of the free surface on the same surface energy unit
equal. The unit is milli Newton per meter (mN/m).
Principle 4
A flat ring into the surfactant solution to be tested, and when the liquid level is raised upward, will be formed between the ring and a liquid-liquid
Film, this film to the ring to produce a vertical downward force, determined to break down film needed to pull the ring of the smallest force, namely the table of the test solution
Surface tension.
5 Reagents and solutions
5.1 water are GB/T 6682 analytical laboratory use specifications and test methods of secondary water.
5.2 Surfactant Solution. Sample Surfactant take a certain amount of water and carefully formulated as a sample solution. To maintain the temperature of the solution
Constant temperature change should be within the 0.5 ℃.
5.3 Determination of the water used is not allowed contact with rubber stoppers and cork in particular, to prevent water pollution.
5.4 point in the vicinity of the critical concentration was measured [for example, Kraft (Krafft) point, ethylene oxide condensates cloud point, etc.], the more error
Great, so it is best measured at a temperature above or below the Krafft ethylene oxide condensate cloud point temperature.
Surface of the solution to the volatile chemical solvents or around atmospheric dust is very sensitive, so do not progress in the determination processing room
Volatile items, Instrument cover cover up.
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