GB 5009.241-2017 Translated English of Chinese Standard. GB5009.241-2017: National Food Safety Standard - Determination of Magnesium in Food [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]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. |
Contents
Foreword | 4 |
Apparatus | 5 |
Analytical Procedures | 6 |
Expression of Analytical Results | 8 |
Appendix A Microwave Digestion and TemperatureRise Program | 10 |
Common terms and phrases
100mL 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 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 solution digestion Take 0.2g~1g electric hot plate Emission Spectrometry evenly for spare-use hollow cathode lamp Inductively Coupled Plasma liquid specimen magnesia magnesium content Magnesium in Food magnesium mass concentration Magnesium standard series magnesium stock solution measure the absorbance mg/L microwave digestion tank mix evenly muffle furnace nitric acid solution Perchloric acid Plasma Mass Spectrometry small amount solid specimen soy sauce specimen or accurately specimen solution Spectrometry See GB Standard magnesium intermediate standard series solution Standard substance stock solution 1000mg/L Take 0.5g~5g accurate Teflon digestion inner volume is 25mL washing liquid water to wash