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GB 25578-2010: National food safety standards of food additives talc
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National food safety standards of food additives talc
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GB 25578-2010
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Basic data | Standard ID | GB 25578-2010 (GB25578-2010) | | Description (Translated English) | National food safety standards of food additives talc | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 8,874 | | Date of Issue | 2010-12-21 | | Date of Implementation | 2011-02-21 | | Regulation (derived from) | Ministry of Health Bulletin No. 19 of 2010 | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This Chinese standard applies to talc as raw material by physical crushing method were food additives talc. | GB 25578-2010: National food safety standards of food additives talc---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.
National food safety standards of food additives talc
National Food Safety Standard
Food additives Talc
Issued on. 2010-12-21
2011-02-21 implementation
National Standards of People's Republic of China
People's Republic of China Ministry of Health issued
Foreword
Appendix A of this standard is a normative appendix.
National Food Safety Standard
Food additives Talc
1 Scope
This standard applies to talc as raw material by physical crushing method were food additive talc.
2 Normative references
The standard file referenced in the application of this standard is essential. For dated references, only the edition date of the note
Apply to this standard. For undated references, the latest edition (including any amendments) applies to this standard.
3 Technical requirements
3.1 Sensory requirements. comply with Table 1.
Table 1 Sensory requirements
Project requires test methods
Color White take appropriate sample is placed in 50mL beaker, observe the color in natural light
And texture. Organization Status powder
3.2 Physical indicators. to comply with Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Silica, w /% ≥ 58.0 Appendix A A.4
Magnesia, w /% ≥ 30.0 Appendix A A.5
Whiteness ≥ 85.0 A.6 in Appendix A
In Acid (as SO 4), w /% ≤ 1.5 Appendix A A.7
Loss on ignition, w /% ≤ 6.0 Appendix A A.8
Loss on drying, w /% ≤ 0.5 A.9 in Appendix A
Water-soluble material, w /% ≤ 0.1 Appendix A A.10
Water-soluble iron by test A.11 in Appendix A
By pH test A.12 in Appendix A
Fineness (45μm test sieve through rate), w /% ≥ 98.0 Appendix A A.13
TABLE 2 (cont.)
Item Index Test Method
Arsenic (As)/(mg/kg) ≤ 3 Appendix A A.14
Lead (Pb)/(mg/kg) ≤ 5 Appendix A A.15
Heavy metals (Pb)/(mg/kg) ≤ 10 Appendix A A.16
Amphibole asbestos may not be detected in Appendix A A.17
Appendix A
(Normative)
Testing method
A.1 Warning
Reagents of this standard test method for use in corrosive, the operator must be careful! As should be immediately washed with water splashed on the skin
Wash, severe cases should seek medical care immediately. When using flammable, do not use open flame heating.
A.2 General Provisions
The standard test methods used in the reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008
Three water regulations. Test the required standard titration solution, impurity standard solution, preparations and products, did not indicate when additional requirements are
Press HG/T 3696.1, HG/T 3696.2, the provisions of HG/T 3696.3 of preparation.
A.3 Identification Test
A.3.1 X-ray diffractometer
X-ray diffraction samples were tested in spacing is 0.934nm, 0.466 nm and 0.312nm at diffraction peaks.
A.3.2 Infrared spectroscopy method
Infrared absorption spectrometer samples were tested have major absorption peak at 1015cm-1 and at 450cm-1 place.
A.3.3 chemical
A.3.3.1 Reagents and materials
A.3.3.1.1 anhydrous sodium carbonate.
A.3.3.1.2 anhydrous potassium carbonate.
A.3.3.1.3 hydrochloric acid.
A.3.3.1.4 ammonia solution. 23.
A.3.3.1.5 ammonium chloride solution. 100g/L.
A.3.3.1.6 ammonium carbonate solution. 100g/L.
A.3.3.1.7 disodium hydrogenphosphate (Na2HPO3 · 12H2O) solution. 160 g/L.
A.3.3.1.8 ammonium chloride solution. 100g/L.
A.3.3.2 analysis step
Weigh about 0.2g sample was placed in a platinum crucible, add anhydrous sodium carbonate 0.9g and 1.3g of anhydrous potassium carbonate, and mix. Was heated on a hotplate
Until completely melted, cooled, boiling water with about 5mL melt is transferred to a beaker, hydrochloric acid was added dropwise to no bubble. Plus 10mL of hydrochloric acid placed
Evaporated to dryness on a water bath. After cooling, 20mL of water, heated to boiling, and filtered. Residue gel-like substance, the filtrate was added ammonium chloride solution
And ammonium carbonate does not precipitate when added disodium hydrogen phosphate solution, should produce a white precipitate. The precipitate was isolated, ammonia water solution, precipitated
It should not be dissolved.
A.4 Determination of silica
According to GB/T 15343-1994 in 5.2.1 were measured.
A.5 Determination of magnesium oxide
Using separate R2O3-EDTA complexometric titration, according to GB/T 15343-1994 in 5.6.1 were measured.
A.6 Determination of whiteness
A.6.1 Instruments and Equipment
A.6.1.1 whiteness meter.
A.6.1.2 Working whiteboard. shall comply with GB/T 5950-2008 in Chapter 6.
A.6.2 Analysis step
A certain amount of sample into the sample vessel pressure, pressed into a smooth surface, no texture, no defect, no stain test model. Each batch of products to be
Pressing three test model.
By the use of the instrument described preheating stable instrument, zero, working with whiteboard tuned instrument. The sample plate is placed on the instrument measurement sample blue
Light whiteness.
Take the arithmetic mean of the parallel determination results of the measurement results, the results of parallel determination of the absolute difference is not more than 0.5.
A.7 Determination of acid-soluble substance
According to GB/T 15343-1994 measured in 5.14.3.2.
A.8 Determination of loss on ignition
According to GB/T 15343-1994 5.1 was measured.
A.9 Determination of loss on drying
According to GB/T 15344-1994 5.1 A method of determination.
Determination of water-soluble substance A.10
A.10.1 Analysis steps
It weighs about 10g sample, accurate to 0.01g, placed in 150mL conical flask, add 50mL water, stirred, and heated to boiling 30min, not
Off stirring, ready to add the evaporated water, the volume of the solution was maintained at about 30mL. Cooling to room temperature, transferred to a 50mL volumetric flask
Diluted with water to the mark. The following press GB/T 15343-1994 5.15.3.2 from the "dry with a paper filter in compact has dried 100mL
Beaker "starts operating (dense filter paper for the slow qualitative filter paper).
While retaining the filtrate for pH measurement.
A.10.2 Calculation Results
With GB/T 15343-1994 in 5.15.4.2.
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.015%.
A.11 Determination of water-soluble iron
According to GB/T 15343-1994 5.16 measured in the test solution is not immediately appear blue through the test.
A.12 Determination of pH
A.12.1 reagents and materials
A.12.1.1 red litmus paper.
A.12.1.2 blue litmus paper.
A.12.2 Analysis steps
A.10.1 reserved filtrate case of litmus paper red and blue litmus paper is not discolored by experiment.
A.13 Determination of fineness
According to GB/T 15344-1994 5.7 specified in the wet sieve method (A method) were measured.
A.14 Determination of Arsenic
Weigh 10.00g ± 0.01g sample was placed in 150mL beaker, add 50mL hydrochloric acid solution (1 + 22), shake the sample full points
Scattered, covered with a watch glass and placed in a boiling water bath on heating 30min (replenish water to prevent dry out). Remove coolish, at medium speed filter paper
100mL volumetric flask, the beaker was rinsed three times with 30mL of hot water and the insolubles were transferred, filter paper and then washed with 15mL of hot water insolubles.
The filtrate was cooled to room temperature, diluted with water to the mark. This solution as the test solution A, for the arsenic content, lead content and heavy metals content
Determination.
Using a pipette, the solution of 10mL, arsenic measuring device placed in a conical flask, adding 5mL hydrochloric acid, as the test solution.
Limits formulated solution. Pipette 3.00mL arsenic standard solution [1 mL solution containing 1.0μg arsenic (As)], the following according to GB/T 5009.76
-2003 Arsenic plaque assay were determined.
A.15 Determination of Lead
A.15.1 reagents and materials
Lead standard solution. 1mL solution containing lead (Pb) 0.10mg.
Pipette Pipette 10.00mL lead standard solution according to HG/T 3696.2 prepared, placed in 100mL volumetric flask, dilute to the mark,
Shake well.
A.15.2 instruments and equipment
Atomic absorption spectrophotometer. with lead hollow cathode lamp.
A.15.3 Analysis steps
A.15.3.1 draw the curve
Pipette 0.00mL, 1.00 mL, respectively, 2.00 mL, 3.00mL lead standard solution, placed in four 100mL flask, diluted with water
To the mark. On an atomic absorption spectrophotometer, at 283.3nm place, using air - acetylene flame measured absorbance. From each mark
Absorbance of standard solution of subtracting the absorbance of the blank solution, the quality of the lead as the horizontal, the vertical axis plotted absorbance curve.
A.15.3.2 Determination
On an atomic absorption spectrophotometer, at 283.3nm place, using air - acetylene flame measured absorbance A test solution. From work
Isolated mass of the test solution of lead on the curve.
A.15.4 Calculation Results
Lead content of lead (Pb) mass fraction w1 and its value in mg/kg according to formula (A.1) Calculated.
1 10- × = m
mw (A.1)
Where.
m1-- isolated mass of the test solution of lead from the working curve value in milligrams (mg);
m - sample mass (A.14) value in units of grams (g).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 2mg/kg.
A.16 Determination of Heavy Metals
A tube. in 50mL colorimetric tube, pipette 1.0mL lead standard solution [1 mL solution containing 0.01 mg of lead (Pb)], add water to 25mL.
spare.
B and C tube tube. pipette for each pipette 10mL test solution A, were placed in two 50mL colorimetric tube, then pipette to C
1.00mL lead standard solution tube moved. spare.
Three each colorimetric tube add 1 drop of phenolphthalein indicator solution, adjusting the pH of the solution is neutral with aqueous ammonia solution and adding 5mL pH3.5 acetate
Formate buffer solution, and mix. The following press GB/T 5009.74-2003 6.4 was measured.
Determination A.17 amphibole asbestos
According to GB/T 15344-1994 of 5.6 was measured.
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