GB/T 5493-2008 PDF English
US$110.00 · In stock · Download in 9 secondsGB/T 5493-2008: Inspection of grain and oils -- Determination of type purity and their mixture Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 5493: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 5493-2008 | English | 110 |
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Inspection of grain and oils -- Determination of type purity and their mixture
| Valid |
| GB/T 5493-1985 | English | 199 |
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Inspection of grain and oilseeds--Methods for determination of varieties and their mixture
| Obsolete |
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GB/T 5493-2008: Inspection of grain and oils -- Determination of type purity and their mixture---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5493-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 67.040
X 10
Replacing GB/T 5493-1985
Inspection of grain and oils - Determination of type purity
and their mixture
Issued on. NOVEMBER 04, 2008
Implemented on. JANUARY 20, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Reagents... 4
4 Instruments and utensils... 4
5 Lighting requirements... 5
6 Operation procedures... 5
7 Result calculations... 6
Foreword
This Standard replaces GB/T 5493-1985, Inspection of grain and oilseeds - Methods
for determination of varieties and their mixture.
The main technical differences between this Standard and GB/T 5493-1985 are as
follows.
-- Add the inspection method of mixture of grains of different types;
-- Add lighting requirements during inspection operations;
-- Modify the inspection method of mixture of indica rice, japonica rice and
glutinous rice and the identification test method of wheat grain color;
-- Modify the content of grain dissecting inspection.
This Standard is proposed by the State Administration of Grain.
This Standard shall be under the jurisdiction of National Technical Committee 270 on
Grain and Oil of Standardization Administration of China.
The organization responsible for the drafting of this Standard. China Grains & Logistics
Corporation Beiliang Co., Ltd.
Organizations participating in the drafting of this Standard. Henan University of
Technology, Chengdu Institute of Grain Storage Science, State Bureau of Grain Reserve,
Henan Province Cereals, Oils and Feed Products Quality Supervision and Inspection
Station.
The drafters of this Standard. Du Haibo, Liu Wei, Wang Hong, Huo Quangong, Wang
Xingjuan, Yin Chenghua.
The previous versions of the standard which are replaced by this Standard are.
-- GB/T5493-1985.
Inspection of grain and oils - Determination of type purity
and their mixture
1 Scope
This Standard specifies the reagents, instruments and utensils, lighting requirements,
operating procedures and result calculations for grain and oil varieties and their mixture.
This Standard applies to the determination of mixture of grains and oils of the same
type and different grain forms, grain natures, and grain colors, as well as the inspection
of mixture of different types of grain and oils.
2 Normative references
The terms in the following documents become the terms of this Standard by reference
to this Standard. For dated references, all subsequent amendments (not including errata
content) or revisions do not apply to this standard. However, parties to agreements that
are based on this Standard are encouraged to study whether the latest versions of these
documents can be used. For undated references, the latest edition applies to this
Standard.
GB 1350, Paddy
GB 1351, Wheat
GB 1354, Milled rice
3 Reagents
0.1% iodine-ethanol solution.
4 Instruments and utensils
4.1 Electronic balance. division value 0.01 g.
4.2 Experimental hulling machine.
5 Lighting requirements
The lighting conditions during operation shall meet the requirements of GB/T 22505.
6 Operation procedures
6.1 Inspection of appearance features
6.1.1 Inspection of mixture of indica rice, japonica rice and glutinous rice. take 10 g of
clean rice, weigh the mass (ma) after husking and milling; pick out the mixed grains of
different types according to the relevant classification regulations in GB 1350; weigh
the mass (m1).
6.1.2 Inspection of mixture of grains of different colors. according to the provisions of
GB/T 5494, weigh the sample mass (mb); at the same time of inspecting the imperfect
grains, sort out the mixed grains of different colors according to the mass standards of
each grain type; weigh its mass (m2).
6.2 Cutin and silty inspection
Observe the grains under transmitted light, or cut the grains horizontally from the
middle to observe the cross-section; those with glassy transparent body and translucent
body in the grain or section are horny, and those with powdery opaque body are silty.
6.3 Dyeing inspection of glutinous rice and non-glutinous rice
After the paddy is husked and whitened, make it into rice samples conforming to the
national standard level 3 (GB 1354);
7 Result calculations
7.1 Calculation of mixing ratio of indica rice, japonica rice and glutinous rice
Calculate the mixing ratio of indica rice, japonica rice and glutinous rice according to
Formula (1).
7.3 Calculation of the content of grains of different types
Calculate the content of grains of different types according to Formula (3).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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