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GB/T 6436-2018

Chinese Standard: 'GB/T 6436-2018'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
GB/T 6436-2018English139 Add to Cart Days<=3 Determination of calcium in feeds Valid GB/T 6436-2018
GB/T 6436-2018Chinese14 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]  


Standard ID GB/T 6436-2018 (GB/T6436-2018)
Description (Translated English) Determination of calcium in feeds
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B46
Classification of International Standard 65.120
Word Count Estimation 7,797
Date of Issue 2018-05-14
Date of Implementation 2018-12-01
Older Standard (superseded by this standard) GB/T 6436-2002
Drafting Organization Guoliang Wuhan Scientific Research Design Institute Co., Ltd. [National Feed Quality Supervision and Inspection Center (Wuhan)]
Administrative Organization National Feed Industry Standardization Technical Committee (SAC/TC 76)
Regulation (derived from) National Standards Announcement No. 6 of 2018
Proposing organization National Feed Industry Standardization Technical Committee (SAC/TC 76)
Issuing agency(ies) State Administration of Markets and China National Standardization Administration

GB/T 6436-2018
(Determination of calcium in feed)
ICS 65.120
National Standards of People's Republic of China
Replace GB/T 6436-2002
Determination of calcium in feed
Published on.2018-05-14
2018-12-01 implementation
State market supervision and administration
China National Standardization Administration issued
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 6436-2002 "Determination of calcium in feed".
The main technical contents of this standard compared with GB/T 6436-2002 are as follows.
--- Revised the scope of use of the standard (see Chapter 1, Chapter 1 of the.2002 edition);
--- Increased the limit of quantitation of calcium (see Chapter 1);
--- Modified the method of sampling and sample preparation (see Chapter 3.4 of the 3.4,.2002 edition);
--- Revised the sample weight (see 3.5.1 and 4.4.1,.2002 version 7.1 and 13.1).
This standard is proposed and managed by the National Feed Industry Standardization Technical Committee (SAC/TC76).
This standard was drafted. Guoliang Wuhan Scientific Research and Design Institute Co., Ltd. [National Feed Quality Supervision and Inspection Center (Wuhan)].
The main drafters of this standard. Gao Lihong, Wang Sisi, Huang Ting, Wang Jun, He Xukong.
The previous versions of the standards replaced by this standard are.
---GB/T 6436-1992, GB/T 6436-2002.
Determination of calcium in feed
1 Scope
This standard specifies the potassium permanganate method and the disodium edetate complex titration method for the determination of calcium in feed.
This standard applies to the determination of calcium in feed ingredients, compound feed, concentrated feed, concentrate supplements and additive premix feed.
The detection limit of this standard method is 0.015%, and the limit of quantification is 0.05%.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Preparation of standard solution by GB/T 601 chemical reagent titration analysis (capacity analysis)
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 14699.1 Feed sampling
Preparation of GB/T 20195 animal feed samples
3 potassium permanganate method
3.1 Principle
The organic matter in the sample is destroyed, the calcium is turned into an ion dissolved in water, the precipitate is quantitatively precipitated with ammonium oxalate, and the calcium content is indirectly determined by the potassium permanganate method.
3.2 Reagents or materials
Unless otherwise stated, all reagents in this standard are analytical grade and grade III water in accordance with GB/T 6682.
3.2.1 Concentrated nitric acid.
3.2.2 Perchloric acid. 70% to 72%.
3.2.3 Hydrochloric acid solution (1 3).
3.2.4 Sulfuric acid solution (1 3).
3.2.5 Ammonia solution (1 1).
3.2.6 Ammonia solution (1 50).
3.2.7 Ammonium oxalate solution (42 g/L). Weigh 4.2 g of ammonium oxalate in 100 mL of water.
3.2.8 potassium permanganate standard solution [c 15KMnO4
The preparation of ÷=0.05mol/L] is specified in GB/T 601.
3.2.9 Methyl red indicator (1 g/L). Weigh 0.1 g of methyl red dissolved in 100 mL of 95% ethanol.
3.2.10 Organic microporous membrane. 0.45mm.
3.2.11 Quantitative filter paper. medium speed, 7cm~9cm.
Related standard:   GB/T 6432-2018  GB/T 6437-2018
Related PDF sample:   GB/T 6435-2014  GB/T 14701-2019
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