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GB 31619-2014 English PDF

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GB 31619-2014: National Food Safety Standard -- Food Additives -- Cassia gum
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GB 31619-2014English189 Add to Cart 3 days [Need to translate] National Food Safety Standard -- Food Additives -- Cassia gum Valid GB 31619-2014

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Basic data

Standard ID GB 31619-2014 (GB31619-2014)
Description (Translated English) National Food Safety Standard -- Food Additives -- Cassia gum
Sector / Industry National Standard
Classification of Chinese Standard C54
Classification of International Standard 67.020
Word Count Estimation 8,858
Date of Issue 12/24/2014
Date of Implementation 5/24/2015
Regulation (derived from) Health Planning Commission Bulletin 2014 No. 21
Issuing agency(ies) National Health and Family Planning Commission of the People's Republic of China
Summary This Standard is applicable to in Cassia (Cassia obtusifolia or Cassia tora) endosperm of plants as raw material, extracted from the processing of food additives Cassia gum. Major containing galactomannan, which contains a linear backbone of mannose and g

GB 31619-2014: National Food Safety Standard -- Food Additives -- Cassia gum

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(National food safety standard.Food Additives.Cassia gum) National Standards of People's Republic of China National Food Safety Standard Cassia gum food additives Published 2014-12-24 2015-05-24 implementation People's Republic of China National Health and Family Planning Commission issued National Food Safety Standard Cassia gum food additives

1 Scope

This standard applies to Cassia (Cassiaobtusifolia or Cassiatora) endosperm of seeds of plants as raw material, processed and extracted Cassia gum food additives. Containing mainly galactomannans, i.e. a polymer comprising a linear backbone of mannose and galactose side chains.

2 structural formula

3 Technical requirements

3.1 Sensory requirements Shall comply with the requirements in Table 1. Table 1 Sensory requirements Project requires test methods Pale yellow to white color Status powder The appropriate amount of sample was placed in a white porcelain plate, its color was observed under natural light and status 3.2 Physical and Chemical Indicators Shall be in accordance with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Galactomannan (w) /% ≥ 75 Appendix A A.3 Loss on drying (w) /% ≤ 12 GB 5009.3 a direct drying method TABLE 2 (cont.) Item Index Test Method Ash (w) /% ≤ 1.2 GB 5009.4 Acid insoluble matter (w) /% ≤ 2.0 A.4 Protein (w) /% ≤ 7 GB 5009.5 Kjeldahl method b Fat (w) /% ≤ 1 GB/T 5009.6 Soxhlet extraction method Starch test by test A.5 Anthraquinone/(mg/kg) ≤ 0.5 A.6 Isopropanol (w) /% ≤ 1.0 A.7 Lead (Pb)/(mg/kg) ≤ 1 GB 5009.12 a drying temperature and time were 105 ℃ ± 2 ℃ and 5h. b protein nitrogen conversion factor of 6.25. 3.3 microbial indicators Shall be in accordance with Table 3. Table 3 microbiological indicators Item Index Test Method Cfu/(CFU/g) ≤ 5000 GB 4789.2 Escherichia coli/(MPN/g) < 3.0 GB 4789.38 Salmonella was not detected/25g GB 4789.4 Yeast and molds/(CFU/g) ≤ 100 GB 4789.15

Appendix A

Testing method A.1 General Provisions Unless otherwise specified in this standard, it should be analytical reagent purity above, the standard titration solution, impurities determined by standard solution used, Formulations and products, shall GB/T 601, GB/T 602, GB/T 603 provisions prepared test water shall comply with GB/T 6682's. The test does not indicate when the solution which is formulated with a solvent, refer to the aqueous solution. A.2 Identification Test A.2.1 solubility test Insoluble in ethanol. Dispersed in cold water to form a colloidal solution. A.2.2 gel test A.2.2.1 added a sufficient amount of sodium borate (Na2B4O7 · 10H2O) test solution in the sample solution (20g/L), the pH of solution exceeds 9 dissolved Solution to form a gel. A.2.2.2 sample weighed 1.5g and 1.5g Xanthan gum, mix well. Under rapid stirring, the mixture was added to 300mL filled with 400mL beaker 80 deg.] C water. The mixture was stirred until dissolved, stirring was continued for 30 min (solution temperature maintained while stirring over 60 ℃). Stirring was stopped and the mixture was allowed to cool for at least 2h at rt. After the temperature dropped below 40 ℃, solid form, with a viscoelastic gel. and Separate 10g/L Xanthan gum solution or a control sample was not control the gel formation. A.2.3 pH 10g/pH L of the sample solution should be 5.5 to 8.0. A.3 Determination of the milk half mannan Mass fraction w1 of galactomannan according to formula (A.1) is calculated. w1 = 100% -w2-w3-w4-w5-w6 (A.1) Where. --- w2 of the mass fraction of drying loss,%; W3 --- ash content,%; --- W4 of the mass fraction of acid-insoluble matter,%; W5 --- protein content,%; W6 --- fat mass fraction,%. Determination of acid insoluble A.4 A.4.1 Reagents and materials A.4.1.1 sulfuric acid. A.4.1.2 filter aid. diatomaceous earth, dried 105 ℃ ± 2 ℃, 3h drying treatment. A.4.2 Instruments and Equipment A.4.2.1 filter crucible (over 105 ℃ ± 2 ℃, 3h drying treatment). A.4.2.2 dryer. A.4.3 Analysis step Weigh 2.0g sample was dissolved in a 150mL filled with water and 1.5mL of sulfuric 250mL beaker. The beaker was covered with a watch glass, in Was heated on a steam bath for 6h, added at any time during heating of water evaporation is lost. After completion of heating, said filter aid after the treatment of dried 500mg, was added to the sample solution was filtered through a weighed filter crucible. Residue washed several times with hot water, then filtered off together with the crucible ± 2 ℃ residue dried for 3h at 105 ℃, weighed after cooling in a desiccator. A.4.4 calculation results Acid insoluble fraction by mass of w4 by the formula (A.2) is calculated. w4 = m1-m2-m3 m4 × 100% (A.2) Where. After drying M1 --- crucible together with the total mass of the residue in grams (G); m2 --- aid mass, in grams (g); --- M3 crucible mass in grams (G); --- M4 sample mass, in grams (g). Starch test A.5 A.5.1 Reagents and materials Iodine solution. Weigh 14.0 g of iodine, dissolved in an aqueous solution containing 100mL 36.0g of potassium iodide was added 3 drops of hydrochloric acid, diluted with water to 1000mL. A.5.2 Analysis step Sample Weigh 1.0g, dispersed in 10mL of water. Iodine solution was added, no blue color appeared, namely by experiment. Determination of anthraquinone A.6 A.6.1 Method summary Anthraquinone extracted with acetonitrile sample was measured by high performance liquid chromatography. NOTE. The sample and reference should be stored. A.6.2 Reagents and materials A.6.2.1 anthraquinone reference. emodin (the EMO) (purity ≥90%), aloe-emodin (the AEM) (purity ≥95%) and physcion (A PHY) (purity ≥98.0%), or 1,8-dihydroxy-3-methoxy-6-methyl - anthraquinone rhein (RHE) (purity ≥95%) and rhubarb root Acid (CHR) (purity ≥98%). A.6.2.2 reference internal standard. 1,8-dihydroxy anthraquinone (purity ≥96%). A.6.2.3 Methanol. HPLC grade. A.6.2.4 Acetonitrile. chromatographically pure. A.6.2.5 trifluoroacetic acid. Sodium bicarbonate solution A.6.2.6. 2g/L. A.6.2.7 acetonitrile/sodium bicarbonate solution. volume ratio of acetonitrile and sodium bicarbonate solution was 60.40. A.6.2.8 buffer. pH9.0. A.6.3 Instruments and Equipment High performance liquid chromatography with diode array detector (wavelength 435nm). A.6.4 Reference chromatographic conditions A.6.4.1 Column. C18 column, 250mm × 4.6mm, particle size 5μm. Other equivalent separation or column chromatography condition. A.6.4.2 mobile phase. AB; A is 0.1% trifluoroacetic acid, B is acetonitrile. A.6.4.3 running time. 60min. A.6.4.4 Gradient. Table A.1. Table A.1 mobile phase concentration ratio Phase A /% Time/min flow of mobile phase B /% A.6.4.5 flow rate. 1mL/min. A.6.4.6 injection volume. 50μL. A.6.5 Analysis step A.6.5.1 Preparation of standard stock solution (100mg/L) of Weigh three kinds of anthraquinone internal standard reference substance and reference substance 1mg ± 0.01mg, about 5mL methanol respectively were transferred to a reference 10mL volumetric flask, after sonication 15min, diluted with methanol to the mark. 4 parts of this stock standard solution was stored at 4 deg.] C in a brown bottle (this solution is stable for 2 weeks). A.6.5.2 Preparation of mixed standard solution (10mg/L) of 3 parts of a standard stock solution of anthraquinone suction 1mL, placed in a volumetric flask of 10mL, diluted with methanol to the mark. Preparation of standard working solution A.6.5.3 Take five 10mL volumetric flask, were added 5mL, 2mL, 1mL, 0.5mL 0mL and mixed standard solution, were then added Standard internal standard stock solution 1mL, after mixing, were diluted to the mark with methanol. Preparation of sample solution A.6.5.4 Weigh about 0.4g sample, accurate to 0.01g, placed in a 50mL round bottomed flask. Was added 20mL of trifluoroacetic acid, at 70 deg.] C Heated to reflux for 4h. The sample was cooled to room temperature, and evaporated to dryness on a rotary evaporator. Was added 3mL of acetonitrile/sodium bicarbonate solution, sonicated Li 30min. The solution was transferred to a centrifuge tube, centrifuged 30min at 5000r/min. Advance by using a buffer solution pH9.0 Neutralized extraction column (Merck, NT1 or other equivalent column) supernatant was filtered. 900μL of sample solution suction filtration, placed in a 2.5mL vial, added to 100μL Standards stock solution and mix thoroughly. Draw standard curve A.6.5.5 In reference A.6.4 chromatographic conditions, respectively for each standard working solution and the internal standard stock solution was subjected to chromatographic analysis, record the chromatograms Each anthraquinone and internal standard peak areas in FIG. In each of the anthraquinone and the internal standard peak area ratio as the standard of each standard working solution concentration (mg/L) curve. A.6.5.6 Determination In reference A.6.4 chromatographic conditions, and each sample solution stock solution of internal standard chromatographic analysis chromatogram of each recording anthracene Quinone and internal standard peak area. Anthraquinone calculated for each internal standard peak area ratios, according to the standard curve, the concentration of each anthraquinone. A.6.6 calculation results Anthraquinone content of each w7 in milligrams per kilogram (mg/kg) basis, calculated according to formula (A.3). w7 = c × 3 × 1000 1000 × 0.9 × m5 (A.3) Where. C --- The concentration of the sample solution in each of the standard curve obtained anthraquinone, in milligrams per liter (mg/L); 3 --- volume of the sample solution, in milliliters (mL); 1000 --- mass conversion factor; 1000 --- volume conversion factor; 0.9 --- sample volume in milliliters (mL); --- mass M5 of the sample in grams (g). The anthraquinone content of each be calculated by the formula (A.3) and is the anthraquinone sample. Determination of isopropanol A.7 A.7.1 Reagents and materials A.7.1.1 isopropanol. chromatography. A.7.1.2 tert-butanol. chromatography. A.7.2 Instruments and Equipment Gas chromatograph equipped with a flame ionization detector. A.7.3 Reference chromatographic conditions A.7.3.1 Column. filler 0.150mm ~ 0.180mm (80 mesh to 100 mesh) silylation of ethylvinylbenzene and divinylbenzene copolymer or Other equivalent materials, 1.8m × 3.2mm (inside diameter). Column chromatography or other equivalent separation efficiency conditions. A.7.3.2 Carrier gas. helium or nitrogen. A.7.3.3 flow rate. 80mL/min. A.7.3.4 Inlet temperature.200 ℃. A.7.3.5 column temperature. 165 ℃. A.7.3.6 detector temperature.200 ℃. A.7.3.7 Injection volume. 5μL. A.7.4 Analysis step Preparation of standard solution A.7.4.1 isopropanol Weigh 100mg of isopropanol, containing about 90mL of water was placed in a 100mL volumetric flask, dilute to 100mL with water, and mix. A.7.4.2 Preparation of standard solution of tert-butanol Weigh 100mg of tert-butanol, containing about 90mL of water was placed in a 100mL volumetric flask, dilute to 100mL with water, and mix. Preparation of mixed standard solution A.7.4.3 Suction isopropanol and tert-butanol 4 mL of each standard solution, placed in a 100mL volumetric flask, dilute to 100mL with water, and mix. The isopropanol and tert-butanol solution containing each of 40μg/mL. Preparation of sample solution A.7.4.4 In one filled with 200mL distilled water 1000mL round-bottomed flask, was added 1mL Suitable antifoaming agents and dispersed. An associate Indeed weighed about 5g of the sample (accurate to 0.001g), shaken 1h. This flask was attached to the fractionating column, to adjust the temperature, so that the foam does not enter the column Promoter, then the distillate was about 95mL. Tert-butanol was added 4mL distillate standard solution, add water added to 100mL, i.e., to obtain a sample solution. A.7.4.5 Determination In reference A.7.3 chromatographic conditions were mixed standard solution and sample solution was subjected to chromatographic analysis. Isopropyl recording color spectra And tert-butanol peak area value. A.7.5 calculation results A.7.5.1 response factor calculation Response factor f according to formula (A.4) is calculated. f = AIPA ATBA (A.4) Where. AIPA --- isopropanol peak area of the chromatogram mixed standard solution; ATBA --- mixed standard solution of tert-butanol chromatogram peak area. Isopropanol content is calculated A.7.5.2 W8 isopropanol content in milligrams per kilogram (mg/kg) basis, according to formula (A.5) Calculated. w8 = SIPA × 4000 f × STBA × m6 (A.5) Where. SIPA isopropanol peak area in the chromatogram of the sample solution ---; 4000 --- conversion factor; f --- response factor; --- of STBA sample solution chromatogram peak area t-butanol; --- M6 sample mass, in grams (g).

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