GB 5009.241-2017 Translated English of Chinese Standard. GB5009.241-2017: National Food Safety Standard - Determination of Magnesium in Foodhttps://www.chinesestandard.net, 16 dec. 2017 - 10 sidor This Standard specifies use flame atomic absorption spectrometry, inductively coupled plasma emission spectrometry, and inductively coupled plasma mass spectrometry to determine the magnesium in food. |
Innehåll
Foreword | 4 |
Apparatus | 5 |
Analytical Procedures | 6 |
Expression of Analytical Results | 8 |
Appendix A Microwave Digestion and TemperatureRise Program | 10 |
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10.0mL of standard 100mL volumetric flask 25mL volumetric flask 3.1 Reagents 3.1.1 Nitric acid 3.13 Hydrochloric acid 5mL of nitric absorbance value accurate to 0.001g accurately pipette accurately transfer 0.500mL~5.00mL acid solution 1+1 acid solution 5+95 adjustable electric hot amount of water Analytical balance arithmetic mean blank test combine the washing conical flask constant volume content is 10.0mg/kg Coupled Plasma Emission crucible digestion inner tank digestion tank electric hot plate evenly for spare-use hollow cathode lamp Inductively Coupled Plasma liquid specimen magnesia magnesium content Magnesium in Food magnesium stock solution measure the absorbance microwave digestion tank mix evenly muffle furnace nitric acid solution Perchloric acid Plasma Emission Spectrometry Plasma Mass Reagents reference conditions sample small amount solid specimen solution 1000mg/L soy sauce specimen or accurately specimen solution standard series solution Standard substance stock solution 1000g/L Take 0.2g~1g accurate take 50mL Teflon digestion inner volume is 25mL washing liquid water to wash