GB 5009.244-2016 Translated English of Chinese Standard. (GB5009.244-2016): National food safety standard - Determination of chlorine dioxide in foodhttps://www.chinesestandard.net, 30. nóv. 2018 - 11 síður 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. |
Efni
| 3 | |
Scope | 4 |
Apparatus | 8 |
Expression of analytical results | 10 |
Annex A Standard curve of chlorine dioxide | 11 |
Common terms and phrases
1.00 g accurate absorbance at 552 Acetic acid add 1 mL aquatic products beaker of 50 borosilicate glass buffer solution pH chlorine dioxide standard ClO2 in sample cm to measure concentration of chlorine Determination of chlorine dioxide in sample dioxide standard solution dioxide standard stock dioxide stock solution distilled water DPD solution 3.2.1 EDTA fibre filter paper g of potassium g of sodium glycine solution grade two water high-speed centrifugal machine iodine flask meat and aquatic mg/kg mg/L mL of DPD mL of phosphate mL of pure mL of sulfuric mL of water mol/L Oxidizing chloride-free grade phosphate buffer solution Potassium dichromate Potassium dihydrogen phosphate potassium iodide pure water quantitative limit r/min reagents refrigerated centrifugation sample solution separating funnel Sodium hydroxide sodium sulfate sodium thiosulfate standard spectrophotometer spectrophotometric method standard curve standard solution c(Na2S2O3 standard stock solution stoppered colourimetric tube sulfuric acid solution thiosulfate standard solution volumetric flask water to dissolve