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, 16. des. 2017 - 10 sider
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.
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Expression of Analytical Results
Appendix A Specimen Digestion Reference Conditions
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100mL volumetric flask 1h or stay 8.0mL of manganese absorbance value accurate to 0.001g accurately pipette 0mL 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 furnace electric hot plate ethanol or carbon evenly for spare-use expel acid 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 mix evenly muffle furnace nitric acid solution perchloric acid plate to remove sample contained ethanol series working solution slowly add 900mL solution 10.0mg/L specimen solution spectrometry stand for 1h standard curve standard solution 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