Water insoluble impurity detection

This standard specifies the inspection method for soft white sugar. This standard is applicable to the determination of soft white sugar produced from sugar beet and sugarcane in the sugar industry

The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 603 Preparation of Preparations and Products Used in Chemical Reagent Test Methods GB/T 6682 Specifications and Test Methods for Analytical Laboratory Water GB/T 13104 Sugar Hygienic Standard 3 Particle Size 3.1 Method Abstract: Measure the average length of the long axis of the cotton white sugar grain using a micrometer under a microscope. 3.2 Instrument and equipment microscope. 3.3 Reagent 3.3.1 Anhydrous ethanol. 3.3.2 Pure Sucrose. 3.3.3 Saturated sucrose solution of anhydrous ethanol: Take a sufficient amount of pure sucrose and place it in anhydrous ethanol. Stir thoroughly with a glass rod, let it stand for 1 hour, and filter the undissolved sucrose to remove it. This is the saturated sucrose solution of anhydrous ethanol. 3.4 Step 3.4.1 Determination: Take a small amount of sample and place it in a 50 mL beaker. Add a small amount of saturated sucrose solution of anhydrous ethanol, stir with a glass rod to separate the adhered grains, and then evenly lay it on a glass slide for observation under an 80 fold microscope. Select 10 particles with neat crystal shape and centered size, measure their long axis dimensions with a micrometer and record them

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