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"]https://www.chinesestandard.net, 16/12/2017 - 10 من الصفحات 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. |
المحتوى
Foreword | 4 |
Apparatus | 5 |
Analytical Procedures | 6 |
Expression of Analytical Results | 8 |
Appendix A Microwave Digestion and TemperatureRise Program | 10 |
عبارات ومصطلحات مألوفة
1.00mL of standard 100mL volumetric flask 25mL volumetric flask 3.1 Reagents 3.1.1 Nitric 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 Take 0.2g~1g digestion tank 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 mix evenly nitric acid solution Perchloric acid Plasma Mass Spectrometry Reagents small amount solid specimen soy sauce specimen or accurately specimen solution Spectrometry See GB Standard magnesium stock standard series solution standard solution Standard substance Take 0.5g~5g accurate take 50mL Teflon digestion inner volume is 25mL washing liquid water to wash