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This standard replaces GB 17203-1998 Food Additive - Calcium Citrate.
The following main changes have been made with respect to GB 17203-1998 (the previous edition):
———The standard is renamed as "National Food Safety Standard - Food Nutritive Fortifier - Calcium Citrate";
———The sensory requirements are modified;
———The index requirements for calcium citrate content (counted by dry basis), loss on drying and plumbum (Pb) are modified;
———The index requirements and inspection methods for heavy metal (counted by Pb), acid-insoluble substances and solution clarity are deleted;
———The identification test method is modified;
———For inspection method of loss on drying, corresponding national standards are refered to;
———The normative references of some inspection methods are adjusted to the latest edition.
National Food Safety Standard
Food Nutritive Fortifier-
Calcium Citrate
1 Scope
This standard is applicable to calcium citrate, a food nutritive fortifier which is obtained from the reaction of citric acid and calcium carbonate (or calcium oxide, calcium hydroxide).
2 Chemical Name, Structural Formula, Molecular Formula and Relative Molecular Mass
2.1 Chemical name
calcium 2-hydroxypropane-1,2,3-tricarboxylate (3:2) tetrahydrate
2.2 Structural formula
2.3 Molecular formula
Ca3(C6H5O7)2·4H2O
2.4 Relative molecular mass
570.50 (in accordance with the international relative atomic mass in 2011)
3 Technical Requirements
3.1 Sensory requirements
The sensory requirements shall be in accordance with those specified in Table 1.
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Table 1 Sensory Requirements
Item Requirement Inspection method
Color and luster White Take an appropriate amount of specimen and put it into a clean dry white porcelain dish, and observe its color and luster as well as condition under natural light
Condition Crystal or crystalline powder
3.2 Physical and chemical indexes
The physical and chemical indexes shall be in accordance with those specified in Table 2.
Table 2 Physical and Chemical Indexes
Item Index Inspection method
Calcium citrate content (counted by dry basis), /%
97.5~100.5 A.3, Annex A
Loss on drying, /%
10.0~14.0 Direct Drying Method a in GB 5009.3
Fluoride/(mg/kg) ≤ 30 A.4, Annex A
Plumbum (Pb)/(mg/kg) ≤ 2.0 GB 5009.75 or GB 5009.12
Arsenic (As)/(mg/kg) ≤ 3.0 GB 5009.76
a Dry at the temperature of 150℃ for 4h.
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Annex A
Inspection Methods
A.1 General
Unless otherwise specified, analytically-pure reagents and Class-III water (defined in GB/T 6682) are adopted for the purpose of this standard. Unless otherwise specified, the standard solution, standard solution for impurity determination, preparations and products used in the test are prepared according to the requirements of GB/T 601, GB/T 602 and GB/T 603. Solutions used in the test are all water solution, unless other solvents for preparation are indicated.
Foreword i
1 Scope
2 Chemical Name, Structural Formula, Molecular Formula and Relative Molecular Mass
3 Technical Requirements
Annex A Inspection Methods
