Standard No.:	GB 5009.241-2017
English Name:	Food safety national standard -- Determination of magnesium in food
Chinese Name:	食品安全国家标准 食品中镁的测定
Professional Classification:	GB    National Standard
Issued by:	National Health and Family Planning Commission, China Food and Drug Administration
Issued on:	2017-04-06
Implemented on:	2017-10-6
Status:	superseded
Superseded by:	GB/T 23375-2009 Determination of copper，iron，zinc，calcium，magnesium and phosphorus content in vegetables and derived products GB/T 18932.12-2002 Method for the determination of potassium,sodium,calcium,magnesium,zine,iron,copper,manganese,chromium,lead,cadmium contents in honey - Atomic absorption spectrometry
Superseded on:	2003-6-1
Superseding:	GB/T 5009.90-2003 Determination of iron,magnesium and manganese in foods GB/T 9695.21-2008 Meat and meat products - Determination of magnesium GB 5413.21-2010 National food safety standard Determination of calcium,iron,zinc,sodium,potassium,magnesium,copper and manganese in foods for infants and young children,milk and milk products GB/T 23375-2009 Determination of copper，iron，zinc，calcium，magnesium and phosphorus content in vegetables and derived products GB/T 14609-2008 Inspection of grain and oils—Determination of copper,iron,manganese,zinc,calcium,magnesium in cereals and derived products by atomic absorption and flame spectrophotometry GB/T 18932.12-2002 Method for the determination of potassium,sodium,calcium,magnesium,zine,iron,copper,manganese,chromium,lead,cadmium contents in honey - Atomic absorption spectrometry NY 82.19-1988 Determination of Calcium and Magnesium in Fruit Juice
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	60.0
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1 Scope This standard specifies the flame atomic absorption spectrometry, inductively coupled plasma emission spectrometry and inductively coupled plasma mass spectrometry for the determination of magnesium content in foods. This standard is applicable to the determination of magnesium content in various foods. Method I Flame Atomic Absorption Spectrometry 2 Principle After digestion treatment, carry out flame atomization for the specimen and determine the absorbance at 285.2nm. Within certain concentration range, magnesium absorbance value is in direct proportion to magnesium content and is compared with standard series for quantification. 3 Reagents and Materials Unless otherwise specified, guaranteed reagents and Class-II water (defined in GB/T 6682) are adopted for the purpose of this method. 3.1 Reagents

Foreword i 1 Scope 2 Principle 3 Reagents and Materials 4 Instruments and Apparatus 5 Analysis Steps 6 Expression of Analysis Results 7 Accuracy 8 Other Annex A Temperature Rise Procedures of Microwave Digestion