GB 5009.244-2016: Translated English of Chinese Standard. (GB5009.244-2016): National food safety standard - Determination of chlorine dioxide in food
This Standard specifies the spectrophotometric method for the determination of chlorine dioxide in vegetables, fruits, livestock and poultry meat and aquatic products. This Standard applies to the determination of chlorine dioxide in vegetables, fruits, livestock and poultry meat and aquatic products.
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Expression of analytical results
Annex A Standard curve of chlorine dioxide
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absorbance at 552 Acetic acid add 1 mL apparatus of chlorine aquatic products borosilicate glass buffer solution 3.2.8 buffer solution pH carry out refrigerated chlorine dioxide standard chlorine dioxide stock cm to measure concentration of chlorine concentration of ClO2 Determination of chlorine dioxide in sample dioxide standard solution dioxide standard stock distilled water EDTA fibre filter paper g of potassium g of sodium glycine solution grade two water iodine flask meat and aquatic mg/kg mg/L mL of phosphate mL of pure mL of sulfuric mL of water mol/L N-diethyl-p-phenylenediamine DPD Oxidizing chloride-free grade paper to filter phosphate buffer solution Potassium dichromate Potassium dihydrogen phosphate potassium iodide pure water quantitative limit r/min reagents refrigerated centrifugation sample solution separating funnel Sodium chlorite saturated Sodium hydroxide sodium sulfate sodium thiosulfate standard spectrophotometer spectrophotometric method standard curve standard solution c(Na2S2O3 standard stock solution sulfuric acid solution thiosulfate standard solution volumetric flask water to dissolve