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GB/T 14490-2008: Inspection of grain and oil -- Determination gelatinization properties in cereal and starch by viscograph
Status: Valid GB/T 14490: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 14490-2008 | English | 189 |
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Inspection of grain and oil -- Determination gelatinization properties in cereal and starch by viscograph
| Valid |
GB/T 14490-2008
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| GB/T 14490-1993 | English | 279 |
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Method for determination of cereal and starch gelatinization properties using a viscograph
| Obsolete |
GB/T 14490-1993
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PDF similar to GB/T 14490-2008
Basic data | Standard ID | GB/T 14490-2008 (GB/T14490-2008) | | Description (Translated English) | Inspection of grain and oil -- Determination gelatinization properties in cereal and starch by viscograph | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 8,860 | | Date of Issue | 2008-08-04 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 14490-1993 | | Quoted Standard | GB 5491; GB/T 5497 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | 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 use of viscometer cereal and starch pasting properties of principle, steps, , apparatus and appliances, said the results and repeatability requirements. This standard applies to the determination of grain and starch pasting properties. | GB/T 14490-2008: Inspection of grain and oil -- Determination gelatinization properties in cereal and starch by viscograph
---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.
Inspection of grain and oil. Determination gelatinization properties in cereal and starch by viscograph
ICS 67.060
B20
National Standards of People's Republic of China
Replacing GB/T 14490-1993
Inspection of grain and cereal starch pasting properties measurement
Viscometer method
Posted 2008-08-04
2008-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is GB/T 14490-1993 "cereal and starch gelatinization properties Determination viscometer Law" amendment.
This standard and GB/T 14490-1993 compared to major changes are as follows.
--- Part of the contents of this standard reference to the ISO 7973.1992 "crushed cereal and cereal products, flour viscometer viscometer
Law "(in English) about the content;
--- Sample suspension mode of preparation has been modified.
From the date of implementation of this standard instead of GB/T 14490-1993.
Appendix A of this standard is an informative annex.
The standard proposed by the National Food Authority.
This standard by the National Standardization Technical Committee OILS.
This standard was drafted. Ministry of Agriculture, Grain Products Quality Supervision and Testing Center (Harbin).
The main drafters of this standard. Lan Jing, Dai Changjun, Li, Zhao is new, Cheng Aihua, Wang Yuekai.
This standard replaces the standards previously issued as follows.
--- GB/T 14490-1993.
Inspection of grain and cereal starch pasting properties measurement
Viscometer method
1 Scope
This standard specifies the use viscometer cereal starch pasting properties and principles, apparatus and appliances, procedures, results are shown, as well as
Repeatability requirements.
This standard applies to the determination of cereal and starch pasting properties.
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 5491 grain and oilseeds testing for sampling, and sample method
GB/T 5497 grain and oilseeds - Determination of water test
Principle 3
A certain concentration of a cereal flour or starch-water suspension, is heated by a certain heating rate, the starch gelatinization. After pasting the start, since the lake
Powder swelling the suspension gradually turned into a paste, the viscosity increased with increasing temperature, fully gelatinized starch, produced the highest viscosity.
Then rupture the starch granules, the viscosity decreased. When the paste material at a certain cooling rate of cooling, pasting was gelling, viscosity values \u200b\u200bare further increased, cold
But to viscosity at 50 ℃ shall be final viscosity values.
Resistance to change by viscometer sensors, sensor shaft, measuring coil spring, said the whole process of pasting viscosity changes arising reflect
To the automatic recorder, depicting the viscosity curve, read and evaluate the cereal starch pasting properties of the indicators, including the start pasting temperature, the maximum
Viscosity, viscosity is the highest temperature, minimum viscosity and final viscosity after gelation and the like.
4 apparatus and appliances
4.1 Viscometer 1). Brabender type viscometer consists of measuring the force of the coil spring, sensing the vertical axis, the sensor (blender), measuring bowl, radiation, electric stove, cold
Cooling water, drive turbines, speed, timer, contact thermometer, temperature adjustment and automatic control system, automatic control system cooling, automatic recorder
And other components. Sensors and measuring bowl metal rod should be vertical, smooth insertion "Targeting Board". The main technical parameters are as follows.
--- Measuring bowl speed. (75 ± 1) r/min;
--- Ramp rate. (1.50 ± 0.03) ℃/min;
--- Heating and cooling range. room temperature to 97 ℃;
--- Contact thermometer. scale 1.0 ℃;
--- Recorder paper speed. (0.50 ± 0.01) cm/min;
--- Recording paper Range. 0A. U. ~ 1000A. U. (A.U. viscosity units);
--- Load coil spring torsional moment. (34.32 ± 0.69) mN · m/A. U. [(350 ± 7) gf · cm/A. U. ]
(68.65 ± 1.47) mN · m/A. U. [(700 ± 15) gf · cm/A. U. ];
--- Load coil spring effective deflection angle. 62 °.
1) This standard can also achieve the same results using other types of viscometer.
4.2 Balance. a sense of the amount of 0.1g.
4.3 Beaker. 600mL.
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