GB 5009.76-2014: Translated English of Chinese Standard. GB5009.76-2014: National Food Safety Standard - Determination of arsenic in food additives
https://www.chinesestandard.net, Oct 22, 2017 - Technology & Engineering - 16 pages
This standard specifies the determination of arsenic in food additives. This standard applies to the determination of arsenic in food additives.
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515 nm absorption absorption tube accurate to 0.001 ADD 10 mL Adjustable electric furnace air duct arithmetic mean arsenic in food Arsenic standard stock Arsenic trioxide arsine conical flask CONTINUE heating COOL Determination of arsenic Electric heating plate ethanol excellent grade pure food additives g of magnesium g of sodium hydrochloric acid solution lead acetate cotton LET it stand Magnesium nitrate solution magnesium oxide MEASURE 100 mL MIX it uniformly mL of arsenic mL of sulfuric mL of water mL volumetric flask nitric acid nm absorption solution No.19 standard mouth perchloric acid phenolphthalein potassium borohydride potassium iodide pyridine reach to 100 Respectively ADD sample solution sodium borohydride Sodium hydroxide solution solution 150 g/L standard series standard stock solution standard substance certified stannous chloride substance certificate sulfuric acid solution temperature thiourea trichloromethane volume reach water to dilute water to dissolve water to rinse wavelength 540 nm WEIGH 1.0 g white smoke