GB 5009.242-2017 Translated English of Chinese Standard. GB5009.242-2017: National Food Safety Standard - Determination of Manganese in Food
https://www.chinesestandard.net, 2017 M12 16 - 10 pages
This Standard specifies three determination methods for manganese in food, namely, flame atomic absorption spectrometry, inductively coupled plasma emission spectrometry, and inductively coupled plasma mass spectrometry.
Expression of Analytical Results
Appendix A Specimen Digestion Reference Conditions
100mL volumetric flask 1h or stay 3.1 Reagents 3.1.1 Nitric acid 3.4.1 Manganese standard absorbance value accurate to 0.001g Adjustable temperature-control electric arithmetic mean atomic absorption spectrometer blank test carbon dioxide condition can refer constant volume digestion inner tank digestion method Take dioxide at low Dry digestion method electric hot plate ethanol or carbon evenly for spare-use Fast frozen food heat the sample hollow cathode lamp inductively coupled plasma infant formula manganese content manganese in food Manganese standard stock mass concentration mass spectrometry method Take 0.5g~5g mg/L mix evenly muffle furnace nitric acid solution perchloric acid pipette 0mL plate to remove sample contained ethanol series working solution slowly add 990mL solution 1000mg/L specimen solution stand for 1h standard curve standard series standard substance standard working solution stay overnight Take 0.5g~5g accurate Take out inner Take the edible tank after cooling Teflon digestion inner temperature-control electric hot uniformly homogenize volume to 25mL