GB 5009.14-2017: Translated English of Chinese Standard. GB5009.14-2017: National Food Safety Standard - Determination of Zinc in FoodsThis Standard specifies the flame atomic absorption spectrometry method, the inductively coupled plasma emission spectroscopy method, the inductively coupled plasma mass spectrometry method and the dithizone colorimetric method in the determination of zinc in foods. This Standard is applicable to the determination of zinc in foods, irrespective of materials. |
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Innehåll
| 3 | |
Scope | 4 |
Apparatus | 5 |
Analysis steps | 6 |
Expression of analysis results | 8 |
Principle | 9 |
Apparatus | 12 |
Expression of analysis results | 13 |
Precision | 14 |
Annex A Microwave digestion temperature rising program | 15 |
| 16 | |
Vanliga ord och fraser
accurately remove 0.500 acetic acid-acetate buffer acid solution 0.02 acid solution 1+1 acid solution 5+95 add 10 mL Add 5 mL add water Adjustable heating plate ammonia arithmetic mean carbon tetrachloride layer cuvette Determination of Zinc Discard the carbon dissolve dithizone use solution dithizone-carbon tetrachloride solution flame atomic absorption g nearest guaranteed reagent hydrochloric acid solution Hydroxylamine inductively coupled plasma liquid sample mass concentration mass spectrometry measure 10 mL Measure the absorbance milligrams milliliters milliliters mL mL of liquid mL of nitric mL of water mL of zinc mL separatory funnel mL volumetric flask nitric acid solution Perchloric acid Phenol red polytetrafluoroethylene digestion tank reagent blank test respectively add sample OR accurately set volume Sodium acetate sodium thiosulfate solution 0.02 mol/L solution 0.1 g/L solution 1000 mg/L solution 2 mol/L standard stock solution stock solution 1000 tetrachloride solution 0.1 weigh 0.2 g Zinc in Foods Zinc oxide Zinc standard stock
Bibliografisk information
| Titel | GB 5009.14-2017: Translated English of Chinese Standard. GB5009.14-2017: National Food Safety Standard - Determination of Zinc in Foods |
| Författare | https://www.chinesestandard.net |
| Utgivare | https://www.chinesestandard.net, 2017 |
| Längd | 16 sidor |
| Exportera citat | BiBTeX EndNote RefMan |