Color Take an appropriate amount of sample in the white shallow dish on the natural light line, observe, white to light yellow.
Taste smell Take an appropriate amount of sample in the white shallow dish in natural light, observe, slightly sweet and odorless.
State of organization Take an appropriate amount of the sample in the white shallow disk in natural light, observe, crystal or powder crystal.
Lactose a (In the dry basis)/(g/100g) A lactose content according to (100- water-ash)/(100-water) calculation. 99.0
Water/(g/100g) 6.0 (GB 5009.3-2010 Karl fisher method)
Ash/(g/100g) 0.3 (GB 5009.4)
PH/(10% aqueous solution) Take 10g of lactose in 100ml beaker, add distilled water into 10% water solution,with a pH measuring the value of pH. 4.5-7.0.
Conclusion : The quality standard test of this food lactose is in accordance with the regulations.
Product Name: Lactose "Type: Food Additives Origin: China CAS No.: 63-42-3 AUCO No.: 919 Packing: 25kg bag" Items Standard Identification A The infrared absorption spectrum of the sample is concordant with that of the standard. Identification B The principal spot obtained from the Test solution corresponds in appearance and RF value to that obtained from Standard solution A The test is not valid unless the chromatogram obtained with Standard solution B shows four clearly discernible spots, disregarding any spots at the origin. Identification C A red color develops. Specific optical rotation +54.4~+55.9, calculate on the anhydrous basis Acidity or alkalinity Add 0.3ml of phenolphthalein TS: the solution is colorless, and not more than 0.4 ml of 0.1 N sodium hydroxide is required to produce a red color. Water Not more than 1.0% Residue on ignition Not more than 0.1% Heavy metals The limit is 5µg per g. Protein and light-absorbing impurities The absorbance divided by the path length in centimeters is not more than 0.25 in the range of 210 to 220nm and is not more than 0.07 in the range of 270 to 300nm. TPC
