Analytical Methods for Vitamins in Food/pharma Premixes |
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Page 10
... D3 at 264 nm . The result is calculated as the sum of vitamin D3 and previtamin D3 using an empirical factor based on the average previtamin D3 / vitamin D3 ratio ( 7 % ) of vitamin D3 dry powders used in premixes . Reagents As far as ...
... D3 at 264 nm . The result is calculated as the sum of vitamin D3 and previtamin D3 using an empirical factor based on the average previtamin D3 / vitamin D3 ratio ( 7 % ) of vitamin D3 dry powders used in premixes . Reagents As far as ...
Page 11
... D3 of standard solution C = Concentration of standard solution in IU / ml ( 240 ) W1 = Weight of sample Procedure 1.07 = Empirical factor for including 7 % of previtamin D3 Into a 100 ml centrifuge tube pipette 50.0 ml of n - hexane , 5 ...
... D3 of standard solution C = Concentration of standard solution in IU / ml ( 240 ) W1 = Weight of sample Procedure 1.07 = Empirical factor for including 7 % of previtamin D3 Into a 100 ml centrifuge tube pipette 50.0 ml of n - hexane , 5 ...
Contents
Introduction 31 | 3 |
Determination of Vitamin A by HPLC 81 | 10 |
Determination of Vitamin K₁ by HPLC 151 | 17 |
2 other sections not shown
Common terms and phrases
100 ml volumetric amin analytical grade Ascorbic acid assay Biotin bring to volume Calcium pantothenate calculated Carotenoids Compact de Luxe conc Concentration of standard Cyanocobalamin dard Determination of Vitamin Dry Vitamin Premixes filter flask accurately weigh Folic Acid g/kg HPLC HPLC Modules HPLC record Instruments and Conditions IU vitamin IU/kg IU/ml kHz e.g. Compact LINEAR UVIS 204 Methods for Vitamins mg Vitamin Milford MA Millipore Corp minutes ml centrifuge tubes ml of methanol ml volumetric flask Mobile phase n-hexane Niacinamide Peak area Phytomenadione pipette piston pulse-free pump possible all reagents Preparation of Sample previtamin D3 Pyridoxine reagents of analytical Results CV Riboflavin sodium standard solution stock solution Thiamine Ultrasonic water-bath USP reference standard V₂ Variation of Results vitamin A acetate vitamin A palmitate Vitamin B2 vitamin D3 Vitamin E volume with ethanol volume with water volumetric flask accurately W₁ wavelength Weight of sample