GB 7300.312-2025 Feed additives—Part 3:Minerals and their complexes (or chelates)—Tricalcium phosphate English, Anglais, Englisch, Inglés, えいご
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ICS
CCS H
National Standard of the People's Republic of China
GB 7300.312-2025
Feed additives - Part 3: Minerals and their complexes (or chelates) - Tricalcium phosphate
饲料添加剂 第3部分：矿物元素及其络（螯）合物 磷酸三钙
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
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Chemical Name, Molecular Formula, Relative Molecular Mass
5 Technical Requirements
6 Sampling
7 Test Methods
8 Inspection Rules
9 Labeling, Packaging, Transportation, Storage and Shelf Life
Introduction
Feed additives refer to substances added in small or trace amounts during the processing, manufacturing, and use of feed, including nutritional feed additives and general feed additives. For ease of use, and according to product type, GB 7300 "Feed Additives" is divided into the following 13 major parts:
— Part 1: Amino acids, amino acid salts and 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, mold inhibitors and acidity regulators;
— Part 9: Coloring agents;
— Part 10: Flavoring and appetite-stimulating substances;
— Part 11: Binders, anti-caking agents, stabilizers and emulsifiers;
— Part 12: Polysaccharides and oligosaccharides;
— Part 13: Others.
The product tricalcium phosphate covered by this document belongs to the third major part: Mineral elements and their complexes (chelates). As tricalcium phosphate is the twelfth product standard published under this major part, this document is assigned the number GB 7300.312 and serves as Part 312 of GB 7300.
Feed Additives — Part 3: Mineral Elements and Their Complexes (Chelates) — Tricalcium Phosphate
1 Scope
This document provides the chemical name, molecular formula and relative molecular mass of tricalcium phosphate, and specifies the technical requirements, inspection rules, labeling, packaging, transportation, storage and shelf life of the feed additive tricalcium phosphate. It also describes the sampling and test methods.
This document applies to the feed additive tricalcium phosphate produced by high-temperature sintering, chemical precipitation, or calcium phytate hydrolysis processes.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition corresponding to the date applies. For undated references, the latest edition (including any amendments) applies.
GB/T 601 Chemical Reagents — Preparations of standard volumetric solutions
GB/T 602 Chemical Reagents — Preparations of standard solutions for impurity determination
GB/T 603 Chemical Reagents — Preparations of reagents and solutions for use in test methods
GB/T 5917.1 Determination of Feed Particle Size — Sieving Method Using Two Sieves
GB/T 6435-2014 Determination of Moisture in Feeds
GB/T 6682 Water for Analytical Laboratory Use — Specification and Test Methods
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment 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 13088 Determination of Chromium in Feeds
GB/T 14699 Feeding Stuffs — Sampling
3 Terms and Definitions
No terms and definitions are stipulated in this document.
4 Chemical Name, Molecular Formula, Relative Molecular Mass
4.1 Chemical name: Tricalcium phosphate.
4.2 Molecular formula: Ca₃(PO₄)₂.
4.3 Relative molecular mass: 310.18 (based on the 2022 international relative atomic masses).
5 Technical Requirements
5.1 Appearance and Properties
Shall be white, grayish-white to brown powder or granules.
5.2 Identification
Shall comply with the identification reactions for calcium ion and phosphate radical.
5.3 Physicochemical Indicators
Shall comply with the requirements specified in Table 1.
5.4 Hygiene Indicators
Shall comply with the requirements specified in Table 2.
6 Sampling
Carry out according to GB/T 14699.
7 Test Methods
Warning — Some reagents used in the test methods are corrosive. Exercise caution during operation and take appropriate safety and protective measures.
7.1 General Provisions
Unless otherwise specified, all reagents used shall be of analytical grade; all standard volumetric solutions, standard solutions for impurities, and other reagents/solutions shall be prepared according to GB/T 601, GB/T 602, and GB/T 603; water used in tests shall be Grade 3 water as specified in GB/T 6682.
7.2 Appearance and Properties
Place an appropriate amount of the sample on a clean, dry white porcelain plate. Observe its color and form under natural light.
7.3 Identification
7.3.1 Reagents or Materials
7.3.1.1 Glacial acetic acid.
7.3.1.2 Hydrochloric acid solution: V(hydrochloric acid) : V(water) = 1:1.
7.3.1.3 Ammonia solution: V(ammonia water) : V(water) = 2:3.
7.3.1.4 Ammonium oxalate solution (100 g/L): Weigh 10 g of ammonium oxalate, dissolve in water, dilute to 100 ml, mix well.
7.3.1.5 Silver nitrate solution (170 g/L): Weigh 17 g of silver nitrate, dissolve in water, dilute to 100 ml, mix well.
7.3.1.6 Nitric acid solution: V(nitric acid) : V(water) = 1:8.
7.3.2 Apparatus
Analytical balance: accuracy of 0.01 g.
7.3.3 Test Procedure
7.3.3.1 Calcium Ion
Weigh 0.1 g of the sample into a 50 ml beaker, add 5 ml of glacial acetic acid (7.3.1.1) to dissolve, boil, cool, and filter. Add 5 ml of ammonium oxalate solution (7.3.1.4) to the filtrate; a white precipitate should form. This precipitate should be soluble in hydrochloric acid solution (7.3.1.2).
7.3.3.2 Phosphate Radical
Weigh 0.1 g of the sample into a 25 ml colorimetric tube, add 10 ml of water, dissolve and mix well. Add 1 ml of silver nitrate solution (7.3.1.5); a yellow precipitate should form. This precipitate should be soluble in excess ammonia solution (7.3.1.3) or nitric acid solution (7.3.1.6), but insoluble in glacial acetic acid (7.3.1.1).
7.4 Calcium (Ca)
7.4.1 Principle
The sample is acidified and boiled at high temperature to form a calcium ion solution. Interference from other ions is eliminated using triethanolamine, ethylenediamine,
