GB 5009.31-2016 Translated English of Chinese Standard. GB5009.31-2016: National Food Safety Standard - Determination of p-hydroxybenzoic acid esters in foodstuffs [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2018/06/02 - 9 ページ This Standard specifies the gas chromatography method for the methyl paraben, ethyl p-hydroxybenzoate, propyl paraben and butyl paraben in foods. This Standard is applicable to the determination of methyl paraben, ethyl phydroxybenzoate, propyl paraben and butyl paraben in soy sauce, vinegar, beverages and jams. |
目次
| 3 | |
Scope | 4 |
Instrument and Apparatus | 6 |
Expression of Analysis Results | 7 |
Precision | 8 |
Appendix A Chromatogram of Parabens Standard Solution | 9 |
多く使われている語句
10.0 mL volumetric 10mL of saturated 250mL separating funnel accurate to 0.001g accurately add 2.0 add 10mL adjusted according anhydrous ethanol anhydrous ether anhydrous sodium sulfate butyl paraben closes to dryness coefficient from converting conduct qualitative diagnosis constant volume conversion coefficient Determination of p-hydroxybenzoic dilute discard the water esters in foodstuffs ethanol to dissolve ethyl p-hydroxybenzoate filter paper flame ionization detector funnel’s neck gas chromatography GB/T hydrogen flame ionization injection instrument conditions methyl paraben mg/kg milliliter mL of anhydrous mL volumetric flask p-hydroxybenzoic acid esters paraben and butyl paraben in foods paraben standard stock parahydroxybenzoic acid propyl paraben purity range of parabens Reagents respectively pipette rotary evaporator sample solution saturated sodium chloride shake it evenly sodium bicarbonate solution sodium chloride solution solution of parabens solution to wash soy sauce standard curve Standard intermediate solution standard stock solution standard working solution take 5g accurate Temperature rising condition water layer weigh and take