GB/T 5509-2008Inspection of grain and oils - Determination of magnetic metals content of flours (English PDF)
粮油检验 粉类磁性金属物测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 4, 2008
Implementation date
January 20, 2009
Scope
GB/T 5509-2008 is the English-translated version of 粮油检验 粉类磁性金属物测定.
GB/T 5509-2008 is a grain and oils inspection method for the magnetic metal content of flours.
Clause 1 states that the standard specifies the principle, apparatus and appliances, procedure and calculation of results for the measurement of magnetic metal in flour, and that it applies to the determination of the magnetic metal content of wheat flour, rice flour, glutinous rice flour, corn flour and the various cereal flour nutrition powder food products.
The clause printed as Principle 3 separates the magnetic metal from the crude sample with the magnetic field of an electromagnet or a permanent magnet and then separates it from the remaining sample mixture with a small permanent magnet, so that the magnetic metal content can be calculated.
Clause 4, apparatus and appliances, calls for a magnetic metal detector with a magnetic induction strength of not less than 120 mT, a separation plate of 210 mm by 210 mm by 6 mm with a magnetic flux density of not less than 120 mT and shown schematically in Appendix A, balances with division values of 0.0001 g and of 1 g with a maximum weighing above 1000 g, weighing paper, a brush, a large ear wash ball and scoops.
Clause 5, steps, has the sample taken and divided according to GB 5491 and weighed out at 1 kg to the nearest 1 g, then in 5.2.1 poured into the hopper of the magnetic metal detector at a flow of about 250 g/min, with the metal adsorbed in the instrument brushed off and collected on paper, and in 5.2.2 worked on the separation plate; the draft version on the page breaks off in mid-sentence inside 5.2.2, so neither the rest of the procedure nor the calculation is shown.
Clause 2 cites GB 5491, and the foreword declares Appendix A an informative annex.
The foreword also records that against the 1985 edition the magnet attraction method and the carbon tetrachloride rinsing solution were cancelled, the magnet requirement was restated as a magnetic induction of 120 milli-Tesla, the formula unit went from mg/kg to g/kg, a flow time through the instrument was specified, the separation plate and its technical parameters were added to the apparatus clause while the horseshoe magnet was removed, and the informative appendix with the separation plate schematic was added.
The page gives ICS 67.040 and Chinese classification X10. It replaces GB/T 5509-1985, was issued on 2008-11-04 and has applied since 2009-01-20.
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Document preview — GB/T 5509-2008
National Standard of the People's Republic of China
- ICS
- 67.040
- Classification
- X 10
- Replacing
- GB/T 5509-1985
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Principle
- 4 Apparatus and appliances
- 5 Steps
Foreword
This standard replaces GB/T 5509-1985 "grain and oilseeds test powder magnetic metals assay." This standard and GB/T 5509-1985 main technical differences are as follows.
--- Increasing the scope of this standard;
--- Canceled a standard method of operation 2.2 "Magnet Law of Attraction";
--- Canceled a standard method of operation of the rinsing solution --- carbon tetrachloride;
--- Original standard "magnet suction unit 12kg" to "120 milli-Tesla magnetic induction (mT)";
--- Increased operating method for processing residual sample and the magnetic metal plate separating mixtures by magnet separation;
--- Increase in the "evaluation" process sample flow rate through the drip model specified time;
--- Original standard formula of "mg/kg" replaced by "g/kg";
--- In the "apparatus and appliances" column adds "separating plate" and its technical parameters;
--- In the "apparatus and appliances" column abolition of the "horseshoe magnet" and technical requirements;
--- Increase the informative appendix "separation plate schematic" (see Appendix A).
Appendix A of this standard is an informative annex.
The standard proposed by the National Food Authority.
1 Scope
This standard specifies the flour magnetic metal grain measurement principle, apparatus and appliances, and the result of the calculation procedure.
This standard applies to wheat flour, rice flour, glutinous rice flour, corn flour and various cereals flour food nutrition powder product-containing magnetic metal Determination of the amount.
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 Inspection of grain oilseeds for sampling, and sample method
3 Principle
Electromagnet or permanent magnet to which the magnetic field having a magnetic metal separated from a crude sample, then small permanent magnets The magnetic metal separated from the residue of the sample mixture out to calculate the content of the magnetic metal objects.
4 Apparatus and appliances
4.1 magnetic metal detector. magnetic induction strength of not less than 120mT (milli-Tesla).
4.2 Separation plate. 210mm x 210mm x 6mm, a schematic diagram in Appendix A, the magnetic flux density of not less than 120mT.
4.3 Balance. dividing the value of 0.0001g.
4.4 Balance. dividing the value of 1g, the largest weighing more than 1000g.
4.5 Weighing paper. sulfuric acid paper or absorbent paper is not easy.
4.6 White. about 200mm x 300mm.
4.7 brush, large ear wash ball, scoops and other said.
5 Steps
5.1 Said sample
5.1.1 for sampling and sample decimation performed in GB 5491.
5.1.2 Weigh the sample (m1) 1kg, accurate to 1g from the average sample dispensing.
5.2 Determination
5.2.1 Analyzer separation
Open magnetic metal detector (4.1) of the power supply, the sample is poured into a measuring instrument Sheng powder hopper, press through a magnetic switch. Adjust the flow control plate Knob to control the sample flow 250g/min or so, so that the sample uniform by drip into the reservoir model pink box. The sample stream to be finished, wash the ear Balls remaining on the drip template sample powder is blown into the storage tank and then connected with a clean white mobility analyzer model below, through closed magnetic switch, stand That brush with the hair net adsorbed on a magnetic metal mobility model (containing a small amount of the sample), and collected on a place of white paper.
5.2.2 Separation plate separator
The collected paper-magnetic metal and the sample mixture remaining in a prepared separation plate (4.2), the hand-pulled two paper
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
Cited by
- GB/T 47220-2026Brown rice flour
- GB/T 13360-2024Hulless oat flour
- GB/T 42225-2022Wheat bran
- LS/T 3267-2020Glutinous proso millet flour
- GB/T 35028-2018Buckwheat flour
- JY/T 0602-2017Equipment specifications for the major of grain and oil storage, transportation and detection technology in vocational schools
Similar standards
Editions of GB/T 5509
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 5509-2008 | Inspection of grain and oils - Determination of magnetic metals content of flours | current edition | Current |
| GB/T 5509-1985 | Inspection of grain and oils - Determination of magnetic metals content of flours | previous edition | Superseded |
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