GB 7300.807-2025 Feed additives—Part 8: Preservatives,mildew preventives and acidity regulators—Calcium citrate English, Anglais, Englisch, Inglés, えいご
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ICS
CCS H
National Standard of the People's Republic of China
GB 7300.807-2025
Feed additives - Part 8: Preservatives, mildew preventives and acidity regulators - Calcium citrate
饲料添加剂 第8部分：防腐剂、防霉剂和酸度调节剂 柠檬酸钙
Issue date: 2025-12-31 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Preface
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Chemical Name, Molecular Formula, Relative Molecular Mass, and Structural Formula
5 Technical Requirements
6 Sampling
7 Test Methods
8 Inspection Rules
9 Labeling, Packaging, Transport, Storage, and Shelf Life
Introduction
Feed additives refer to small or trace substances added during the processing, manufacturing, or use of feed, including nutritional feed additives and general feed additives. For ease of use, GB 7300 "Feed Additives" is divided into the following 13 major categories based on product type:
— Part 1: Amino acids, amino acid salts, and their analogues;
— Part 2: Vitamins and vitamin-like substances;
— Part 3: Mineral elements and their complexes (chelates);
— Part 4: Enzyme preparations;
— Part 5: Microorganisms;
— Part 6: Non-protein nitrogen;
— Part 7: Antioxidants;
— Part 8: Preservatives, anti-mold agents, and acidity regulators;
— Part 9: Colorants;
— Part 10: Flavoring and palatability-enhancing substances;
— Part 11: Binders, anti-caking agents, stabilizers, and emulsifiers;
— Part 12: Polysaccharides and oligosaccharides;
— Part 13: Others.
The product in this document, calcium citrate, belongs to the 8th major category of Preservatives, anti-mold agents, and acidity regulators. As calcium citrate is the 7th product standard published within this major category, this document is numbered GB 7300.807, serving as Part 807 of GB 7300.
Feed Additives — Part 8: Preservatives, Anti-mold Agents, and Acidity Regulators — Calcium Citrate
1 Scope
This document provides the chemical name, molecular formula, relative molecular mass, and structural formula of calcium citrate. It specifies the technical requirements, inspection rules, and requirements for labeling, packaging, transport, storage, and shelf life for the feed additive calcium citrate. It also describes sampling and test methods.
This document is applicable to the feed additive calcium citrate produced by reacting citric acid and calcium-containing compounds.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 601 Chemical Reagents — Preparation of Standard Volumetric Solutions
GB/T 603 Chemical Reagents — Preparations of Reagents and Solutions for Use in Test Methods
GB/T 5917.1 Determination of Feed Grinding Fineness — Two-sieve Screening Method
GB/T 6682 Water for Analytical Laboratory Use — Specification and Test Methods
GB/T 8170 Rules for Rounding off of Numerical Values & Expression and Judgement of Limiting Values
GB 10648 Feed Labeling
GB/T 13079 Determination of Total Arsenic in Feeds
GB/T 13080 Determination of Lead in Feeds — Atomic Absorption Spectrometry
GB/T 13083 Determination of Fluorine in Feeds — Ion Selective Electrode Method
GB/T 14699 Feeding Stuffs — Sampling
3 Terms and Definitions
No terms and definitions need to be defined for this document.
4 Chemical Name, Molecular Formula, Relative Molecular Mass, and Structural Formula
4.1 Chemical Name
Calcium 2-hydroxypropane-1,2,3-tricarboxylate tetrahydrate
4.2 Molecular Formula
C₁₂H₁₀Ca₃O14·4H₂O
4.3 Relative Molecular Mass
570.50 (based on 2022 International Relative Atomic Masses)
4.4 Structural Formula
5 Technical Requirements
5.1 Appearance and Characteristics
Shall be a white or off-white crystalline powder, odorless, tasteless, slightly soluble in water, insoluble in ethanol.
5.2 Identification
Shall comply with the identification requirements for calcium ions and citrate ions.
5.3 Physicochemical Indicators
Shall comply with the requirements in Table 1.
5.4 Sanitary Indicators
Shall comply with the requirements in Table 2.
6 Sampling
Carry out according to GB/T 14699.
7 Test Methods
Warning: Some reagents used in the test methods are toxic and corrosive. Operate with caution and take appropriate safety and protective measures.
7.1 General Provisions
Unless otherwise specified, use only reagents confirmed to be of analytical grade and water of Grade 3 as specified in GB/T 6682; solutions mentioned, if no solvent is specified, are aqueous solutions; prepare and standardize all standard volumetric solutions according to GB/T 601; prepare all reagents and solutions used in test methods according to GB/T 603.
7.2 Appearance and Characteristics
Place an appropriate amount of sample on a clean, dry white porcelain plate. Observe its color, form, and odor under natural light.
7.3 Identification Tests
7.3.1 Reagents or Materials
7.3.1.1 Hydrochloric acid solution: Transfer 50 ml of hydrochloric acid, dilute with water to 100 ml, mix well.
7.3.1.2 Nitric acid solution: Transfer 25 ml of nitric acid, dilute with water to 200 ml, mix well.
7.3.1.3 Mercuric sulfate solution: Weigh 29.7 g of mercuric sulfate, dissolve in water, and dilute to 100 ml, mix well.
7.3.1.4 Potassium permanganate solution: Weigh 15.8 g of potassium permanganate, dissolve in water, and dilute to 100 ml, mix well.
7.3.1.5 Acetic acid solution: Transfer 6 ml of glacial acetic acid, dilute with water to 100 ml, mix well.
7.3.1.6 Ammonium oxalate solution: Weigh 14.2 g of ammonium oxalate monohydrate, dissolve in water, and dilute to 100 ml, mix well.
7.3.2 Apparatus and Equipment
7.3.2.1 Electronic balance: Precision 0.01 g.
7.3.2.2 Muffle furnace: Temperature control accuracy ±10°C.
7.3.2.3 Electric hot plate.
7.3.3 Citrate Ion
Weigh 0.5 g of sample into a beaker, dissolve in a mixture of 10 ml water and 2.5 ml nitric acid solution (7.3.1.2). Add 1 ml mercuric sulfate solution (7.3.1.3), place on the electric hot plate (7.3.2.3), heat to boiling, remove. Then add 1 ml potassium permanganate solution (7.3.1.4). A white precipitate forms.
7.3.4 Calcium Ion
