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GB 1886.41-2015 PDF English

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GB 1886.41-2015: National Food Safety Standard -- Food Additives -- Yellow gum
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GB 1886.41-2015: National Food Safety Standard -- Food Additives -- Yellow gum

---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/GB1886.41-2015
NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National food safety standard - Food additives - Yellow gum ISSUED ON: SEPTEMBER 22, 2015 IMPLEMENTED ON: MARCH 22, 2016 Issued by: Health and Family Planning Commission of PRC

Table of Contents

Foreword ... 3 1 Scope ... 4 2 Structural formula ... 4 3 Technical requirements ... 4 Appendix A Inspection method ... 6 National food safety standard - Food additives - Yellow gum

1 Scope

This standard applies to the food additive yellow gum, which is produced by Xanthomonas campestris, as the producing bacteria AND the starch as the main raw material, fermented by specific organisms, purified, dried, pulverized.

2 Structural formula

3 Technical requirements

3.1 Sensory requirements Sensory requirements shall meet the requirements of Table 1. 3.2 Physical and chemical indicators Physical and chemical indicators shall meet the requirements of Table 2.

Appendix A

Inspection method A.1 General provisions The reagents and water, which are used in this standard, refer to analytically pure reagents and grade-3 water as specified in GB/T 6682, unless otherwise specified. The standard solution used in the test, AND the standard solution, preparations, products for impurity determination, shall be prepared in accordance with the provisions of GB/T 601, GB/T 602, GB/T 603, unless otherwise specified. The solution, which is used in the test, refers to the aqueous solution, when the solvent is not specified. A.2 Identification test A.2.1 Solubility test Weigh 1 g (accurate to 0.01 g) of specimen. Slowly pour it into a beaker, which contains 100 mL of water. Soak it for 15 min. Carefully immerse the stirring rod in the water. Slowly turn on the stirrer, to a speed of 200 r/min. After 25 min, it can be completely dissolved. According to this method, add the specimen into ethanol, acetone or ether, without dissolving. A.2.2 Gel test Add 300 mL of water into a 500 mL beaker. Preheat to 80 °C. Turn on the stirrer, to 200 r/min. Add 1.5 g of dry specimen and locust bean gum (accurate to 0.01 g), while stirring, until the mixture forms a solution. Continue to stir, for more than 30 minutes (the water temperature is not lower than 60 °C during the stirring process). Stop stirring. Cool it at room temperature, for at least 2 h. When the temperature drops below 40 °C, a gel will form. Prepare a 1% specimen solution, according to this method, as a control, without adding locust bean gum; there is no such gel. A.3 Determination of viscosity A.3.1 Instruments and equipment Brookfield rotational viscometer or other viscometer of equivalent performance. A.3.2 Measurement conditions A.3.2.1 Rotor model: No.3 rotor. A.3.2.2 Rotor speed: 60 r/min. A.3.2.3 Measurement temperature: 24 °C ~ 25 °C. A.3.3 Analysis steps A.3.3.1 Prepare a solution containing 1% specimen and 1% potassium chloride A.3.3.1.1 Use clean and dry weighing paper, to weigh 3 g of specimen and potassium chloride (accurate to 0.01 g), respectively. Mix them evenly. A.3.3.1.2 Measure 300 mL of distilled water. Pour it into a 400 mL beaker. A.3.3.1.3 Put the beaker, which contains the water, under the stirrer. Turn on the stirrer. Slowly add the mixed specimen to the water, between the stirring blade and the wall of the beaker. Start timekeeping. Make stirring continuously at 800 r/min, for 2 h. The temperature is kept at 24 °C ~ 25 °C. A.3.3.1.4 Stop stirring. Take out the beaker. Turn the solution up and down a few times, by a stirring rod or the like. A.3.3.2 Determination Take an appropriate amount of the solution, which contains 1% specimen and 1% potassium chloride. Put it in a 100 mL high beaker. Measure it under the specified measurement conditions. A.4 Determination of shear property values A.4.1 Determination method According to A.3, measure the viscosity of No.3 rotor, at 6 r/min and 60 r/min, respectively. A.4.2 Result calculation Shear property value, N, is calculated according to formula (A.1): Where: η1 - The viscosity value, when the rotation speed is 6 r/min, in centipoise (cP); η2 - The viscosity value, when the rotation speed is 60 r/min, in centipoise (cP). A.5 Measurement of loss on drying A.5.1 Method summary Dry the specimen to a constant weight, at a certain temperature. Calculate the mass of the lost material. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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