GB 5009.17-2021 Translated English of Chinese Standard (GB5009.17-2021): Determination of total mercury and organic-mercury in foodshttps://www.chinesestandard.net, 5 nov. 2021 - 40 pagini Part 1 of this Standard specifies the methods for the determination of total mercury in food. Part 1 of this Standard is applicable to the determination of total mercury in food. Part 2 of this Standard specifies the methods for the determination of methyl mercury in food. Part 2 of this Standard is applicable to the determination of methyl mercury in aquatic animals and their products, as well as rice and edible fungi. |
Termeni și expresii frecvente
100 mL volumetric accurate to 0.001 accurately draw accurately weigh-take ammonium acetate atomic fluorescence spectrometer blank test calculated by Hg Carrier gas Chromatogram LC-AFS method cold atomic absorption conduct a blank conical flask constant volume coupled plasma mass dichromate 0.5 g/L flow rate g of potassium hydrochloric acid inductively coupled plasma L-cysteine liquid chromatograph mass spectrometer mercury 200 mg/L Mercury chloride mercury mass methanol methyl mercury microwave digestion mL of nitric mL of water mL volumetric flask mobile phase mol/L nitric acid solution phase to dilute Plasma Mass Spectrometry potassium borohydride potassium dichromate 0.5 potassium hydroxide potassium persulfate Prepare it right reach a constant reference conditions reference specimen result shall retain retain 3 significant sodium hydroxide solution of mercury solution of methyl solution of potassium specimen solution standard curve standard series solutions standard stock solution standard working solution stannous chloride sulfuric acid take the edible Temperature weigh-take 0.5 µg/L