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GB/T 15689-2008: Oilseeds -- Determination of acidity of oils
Status: Obsolete GB/T 15689: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 15689-2008 | English | 279 |
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Oilseeds -- Determination of acidity of oils
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GB/T 15689-2008
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| GB/T 15689-1995 | English | 199 |
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Determination of acidity of oils in oilseeds
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GB/T 15689-1995
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PDF similar to GB/T 15689-2008
Basic data | Standard ID | GB/T 15689-2008 (GB/T15689-2008) | | Description (Translated English) | Oilseeds -- Determination of acidity of oils | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B30 | | Classification of International Standard | 67.040 | | Word Count Estimation | 7,773 | | Date of Issue | 2008-11-04 | | Date of Implementation | 2009-01-01 | | Older Standard (superseded by this standard) | GB/T 15689-1995 | | Quoted Standard | GB/T 14488.1; ISO 542-1990 | | Adopted Standard | ISO 729-1988, MOD | | Regulation (derived from) | National Standard Approval Announcement 2008 No.17 (Total No.130) | | 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 for the determination of oil oilseed acidity. The results are expressed as acid value or acidity. Generally depends on the acidity of the product (pure seeds and impurities) to give an oil, if necessary, the seeds can be individually or analytical impurities resulting oil. This standard does not apply with velvet cottonseed, oil palm fruit and olive oil in the determination of acidity. Note: Due to the inter-laboratory tests, lauric acid content of seeds and fruit (copra, palm kernel) test data is less, therefore, the method is applied to these oils are also in doubt. | GB/T 15689-2008: Oilseeds -- Determination of acidity of oils---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Oilseeds. Determination of acidity of oils
ICS 67.040
B30
National Standards of People's Republic of China
Replacing GB/T 15689-1995
Determination of acidity of the oil plant oil
(ISO 729. 1988, MOD)
Posted 2008-11-04
2009-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts the International Standard ISO 729. 1988 "Oilseeds oil acidity determination" (in English).
This standard and ISO 729. The main technical differences compared to 1988 are as follows.
--- Increasing the allowable difference results requirements (see 9.2 of this standard).
For ease of use, this standard the following editorial changes.
--- Delete foreword international standards;
--- The "this International Standard" by "this standard";
--- With a decimal point as a decimal point instead of the original ",". ",";
--- The relevant formulas are numbered.
This standard replaces GB/T 15689-1995 "Determination of acidity of the oil oilseeds."
The main changes in the standards and GB/T 15689-1995, compared as follows.
--- 9.1.3 adds a separate analytical or impurities in seed oil;
--- Modify the precision requirements.
The standard proposed by the National Food Authority.
This standard by the National Standardization Technical Committee OILS.
This standard is drafted by. Nanjing University of Finance and Economics, Jiangsu Province Product Quality Supervision and Inspection Institute.
The main drafters of this standard. Yang Huiping, Yuan Jian, Cai Jing, Yang Xiaorong, Wang Suya, Huang Xiaofeng Meng column group.
This standard replaces the standards previously issued as follows.
--- GB/T 15689-1995.
Determination of acidity of the oil plant oil
1 Scope
This standard specifies the method for determination of oilseed oil acidity, which results in an acid number or acidity expressed.
Acidity depends on general product (pure seed and impurities) resulting oil; if necessary, can be used alone or impurities obtained analytically pure seed
Oil.
This standard does not apply to the determination of acidity pile cottonseed, oil palm and olive-pomace oil in.
Note. Due to the inter-laboratory tests, the less of high lauric acid content of seeds and fruits (copra, palm kernel) test data, so that the method is applied
Some oil is also in doubt.
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 14488.1 oil plant oil content determination (GB/T 14488.1-2008, ISO 659.1998, MOD)
ISO 542.1990 Oilseeds sampling
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Percentage of free fatty acids content of the oil.
3.2
The free fatty acids in the oil and 1g number of milligrams of potassium hydroxide required.
Depending on the type of oil, according to Table 1 indicates acidity.
Table 1 Acidity representation of different types of oils and fats
Fatty oils molar mass of species represented by/(g/mol)
Coconut oil, palm kernel oil and lauric acid
High content of oils
Lauric 200
Other fats oleic acid 282
When the result is written, "acidity" and with no details, then this "acidity" is usually expressed as oleic acid.
Principle 4
The measured amount of oil extracted oilseed oil, dissolved in a mixed solvent of diethyl ether and ethanol, then titrated with a standard solution of potassium hydroxide deposit
In that the free fatty acids in the oil, and calculate the free fatty acid content, expressed in acid number or acidity.
5 Reagents
This standard reagents listed were of analytical grade purity water distilled or equivalent water.
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