GB 5009.158-2016 Translated English of Chinese Standard. GB5009.158-2016: National food safety standard - Determination of Vitamin K1 in Foodshttps://www.chinesestandard.net, 21 lug 2018 - 21 pagine This Standard specifies the method of determining vitamin K1 in foods. In this Standard, Method I is high-performance liquid phase chromatography - fluorescence detection, Method II is liquid phase chromatography - tandem mass spectrometry, which are both applicable to the determination of vitamin K1 in all kinds of formula food, vegetable oil, fruit and vegetable. |
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100 mL volumetric 50 mL centrifuge accurate to 0.01 accurately absorb Accurately weigh-take add 10 mL Add 5 mL add methanol amylase centrifugation at 6,000 chromatographic peak chromatographic purity concentration constant volume content of vitamin dispensed extract drying oven enzymolysis expressed in mL fluid of vitamin fluorescence detector Foods for infants formic acid fruit and vegetable g accurate g of potassium high-performance liquid phase infants and young isopropanol isotope-labeled internal standard K1 and place later usage lipase liquid phase chromatograph membrane to filter Microporous filter mL of N-hexane mL of standard mL of water mL volumetric flask neutral alumina column ng/mL peak area Potassium carbonate potassium dihydrogen phosphate potassium hydroxide products and vegetable r/min reaches dryness Reagents rotary evaporation sample solution solution of vitamin standard curve line standard series standard solution standard stock solution standard working fluid supernatant tandem mass spectrometry Tetrahydrofuran vegetable oil vitamin K1-D7 Zinc chloride zinc column