Foreword

This standard replaces the methods for determination of calcium in GB/T 5009.92-2003 “Determination of calcium in foods”, 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 14610-2008 “Inspection of grain and oils Determination of calcium in cereals and cereal products”, GB/T 9695.13-2009 “Meat and meat products Method for determination of calcium content” and NY 82.19-1988 “Method for determination of fruit juice Determination of calcium and magnesium”.

Compared with GB/T 5009.92-2003, the major changes of this standard are as follows:

——the Chinese name of this standard has been revised to “National food safety standard Determination of calcium in foods”;

——the microwave digestion and pressure tank digestion have been added;

——the flame atomic absorption spectrometry and EDTA titration method have been revised;

——the inductively coupled plasma atomic emission spectrometry has been added;

——the inductively coupled plasma mass spectrometry has been added.