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GB/T 22427.6-2008: Starch -- Determination of whiteness
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 22427.6-2008 | English | 149 |
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Starch -- Determination of whiteness
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GB/T 22427.6-2008
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Basic data | Standard ID | GB/T 22427.6-2008 (GB/T22427.6-2008) | | Description (Translated English) | Starch -- Determination of whiteness | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X11 | | Classification of International Standard | 67.180.20 | | Word Count Estimation | 5,517 | | Date of Issue | 2008-10-19 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | GB/T 12097-1989 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.17 (Total No.130) | | Issuing agency(ies) |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 of light reflective whiteness was measured starch whiteness. This standard applies to dried powdered starch and modified starch. | GB/T 22427.6-2008: Starch -- Determination of whiteness---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.
Starch. Determination of whiteness
ICS 67.180.20
X11
National Standards of People's Republic of China
Replacing GB/T 12097-1989
Determination of starch Whiteness
Posted 2008-10-19
2009-03-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 12097-1989 "starch whiteness determination."
This standard compared with GB/T 12097-1989 The main changes are as follows.
--- Standard name changed to "white starch determination."
--- Revised Scope. apply to "refined starch" to "dry powdered starch and modified starch."
--- Standardized detection methods. Measurement wavelength. from 425nm to 457nm; standard white plate. a ceramic whiteboard or superior grade pure magnesium oxide
Standard white made into a labeled standard whiteboard, standard white whiteness excellent pure magnesium oxide made of the need for regular calibration.
--- Added "7 test report."
This standard is proposed and managed by China General Chamber of Commerce.
This standard was drafted. Chinese Chamber of Commerce Business Standard centers, food, Jiangnan University, China Starch Industry Association modified starch
Professional Committee of Heilongjiang Great Northern Wilderness Potato Industry Co., Ltd., Shandong Zhucheng Health Run-Starch Co., Ltd., Tianjin Development Co., starch peak
The company, Shandong Zhucheng promoting trade Corn Development Company Limited.
The main drafters of this standard. Guzheng Biao, Hong Yan, Cheng Li, Li Mingan, Wang Qiusong, Laiyi Han, Qiu Lizhong, Jin Xiaolei.
Determination of starch Whiteness
1 Scope
This standard specifies the method of light reflective whiteness measured starch whiteness.
This standard applies to dried powdered starch and modified starch.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Under specified conditions, the ratio of the sample surface reflectance of blue light with a standard white surface reflectance.
Principle 3
Blue light through the sample reflectance standard white to blue light reflectivity compared to afford the whiteness of the sample.
4 Instrument
4.1 whiteness meter. tunable wavelength to 457nm, with a suitable sample and standard white box, readings shall be accurate to 0.1.
4.2 pressure injector.
5 operation
5.1 Sample preparation
Samples should be thoroughly mixed.
5.2 Sample whiteboard production
Sample Press whiteness meter (4.1) provided boxed samples, sample and production method according to the whiteboard whiteness meter specified.
5.3 whiteness meter operation
By the method of operation required by regulation, with a marked standard white whiteness excellent pure magnesium oxide manufactured corrected 1).
1) the need for regular calibration standard whiteboard.
5.4 Determination
With whiteness meter samples were measured whiteboard, read whiteness.
5.5 Determination of the number of
Parallel experiments should be carried out.
6 The results are shown
6.1 Representation
Whiteness to whiteness meter sample measured brightness values.
Parallel experiments take the arithmetic mean of the results to one decimal place.
6.2 Repeatability
Parallel experiments, the absolute difference should not exceed 0.2.
If you exceed these limits, it should be re-measured.
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