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GB/T 6439-2007 English PDF (GBT6439-2007)
GB/T 6439-2007 English PDF (GBT6439-2007)
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GB/T 6439-2007: Determination of water-soluble chlorides in feeds
GB/T 6439-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120
B 46
GB/T 6439-2007 / ISO 6495:1999
Replacing GB/T 6439-1992
Determination of Water-Soluble Chlorides in Feeds
(ISO 6495:1999, IDT)
ISSUED ON: JUNE 21, 2007
IMPLEMENTED ON: SEPTEMBER 01, 2007
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Principle ... 5
4 Reagents ... 5
5 Apparatus ... 6
6 Sampling ... 6
7 Preparation of Test Sample ... 7
8 Procedure ... 7
9 Expression of Results ... 8
10 Precision ... 9
11 Test Report ... 10
Annex A (Informative) Results of Interlaboratory Test ... 11
Bibliography ... 12
Foreword
This Standard equivalently adopts the international standard ISO 6495:1999 Animal Feeding
Stuffs – Determination of Water-Soluble Chlorides Content (English Version).
This Standard made the following editorial modifications:
--- Change “This International Standard” to “This Standard”;
--- Delete the Foreword of the international standard;
--- Quote “GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods”
corresponding to “ISO 3696 Water for Analytical Laboratory Use”; and “GB/T 20195
Animal Feeding Stuffs – Preparation of Test Samples” corresponding to “ISO 6498
Animal Feeding Stuffs – Guidelines for Sample Preparation” in the “Normative
References”;
--- Add “GB/T 14699.1 Feeding Stuffs - Sampling” in the “Normative References”;
--- Use “GB/T 20195 Animal Feeding Stuffs – Preparation of Test Samples” corresponding
to “ISO 6498 Animal Feeding Stuffs – Guidelines for Sample Preparation” to replace in
the text “6 Sampling”;
--- Add the No. to the calculation formula according to the requirements of GB/T 1.1-2000.
This Standard replaced GB/T 6439-1992 Method for the Determination of Water-Soluble
Chloride in Feedstuffs.
The major technical differences between this Standard and GB/T 6439-1992 are as follows:
--- Specify in detail the requirements for the analysis steps adopted by different samples;
--- Specify the determination of water-soluble chloride content in feed expressed by sodium
chloride instead of the original standard “sodium chloride” and “chlorine element"”;
--- Add “GB/T 14699.1 Feeding Stuffs - Sampling” and “GB/T 20195 Animal Feeding
Stuffs – Preparation of Test Samples”;
--- Delete the water-soluble chloride rapid titration method (supplement).
Annex A of this Standard is informative.
This Standard was proposed by and under the jurisdiction of National Technical Committee on
Feed Industry of Standardization Administration of China.
Drafting organizations or this Standard: National Feed Quality Supervision and Inspection
Center (Wuhan); and Guangdong Evergreen Conglomerate Co., Ltd.
Determination of Water-Soluble Chlorides in Feeds
1 Scope
This Standard specifies a method for the determination of the water-soluble chlorides content,
expressed as sodium chloride, of animal feeding stuffs.
This Standard is applicable to the determination of water-soluble chlorides content in the animal
feeding stuffs.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced document
applies.
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 14699.1 Feeding Stuffs – Sampling
GB/T 20195 Animal Feeding Stuffs – Preparation of Test Samples
3 Principle
The chlorides present in a test portion are dissolved in water. The solution is clarified if the
product contains organic matter. It is then slightly acidified with nitric acid and the chlorides
are precipitated as silver chloride by means of standard volumetric silver nitrate solution. The
excess silver nitrate is titrated with a standard volumetric solution of ammonium thiocyanate or
potassium thiocyanate.
4 Reagents
Use only reagents of recognized analytical grade.
4.1 Water, complying with at least grade 3 in accordance with GB/T 6682.
Get QUOTATION in 1-minute: Click GB/T 6439-2007
Historical versions: GB/T 6439-2007
Preview True-PDF (Reload/Scroll if blank)
GB/T 6439-2007: Determination of water-soluble chlorides in feeds
GB/T 6439-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120
B 46
GB/T 6439-2007 / ISO 6495:1999
Replacing GB/T 6439-1992
Determination of Water-Soluble Chlorides in Feeds
(ISO 6495:1999, IDT)
ISSUED ON: JUNE 21, 2007
IMPLEMENTED ON: SEPTEMBER 01, 2007
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Principle ... 5
4 Reagents ... 5
5 Apparatus ... 6
6 Sampling ... 6
7 Preparation of Test Sample ... 7
8 Procedure ... 7
9 Expression of Results ... 8
10 Precision ... 9
11 Test Report ... 10
Annex A (Informative) Results of Interlaboratory Test ... 11
Bibliography ... 12
Foreword
This Standard equivalently adopts the international standard ISO 6495:1999 Animal Feeding
Stuffs – Determination of Water-Soluble Chlorides Content (English Version).
This Standard made the following editorial modifications:
--- Change “This International Standard” to “This Standard”;
--- Delete the Foreword of the international standard;
--- Quote “GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods”
corresponding to “ISO 3696 Water for Analytical Laboratory Use”; and “GB/T 20195
Animal Feeding Stuffs – Preparation of Test Samples” corresponding to “ISO 6498
Animal Feeding Stuffs – Guidelines for Sample Preparation” in the “Normative
References”;
--- Add “GB/T 14699.1 Feeding Stuffs - Sampling” in the “Normative References”;
--- Use “GB/T 20195 Animal Feeding Stuffs – Preparation of Test Samples” corresponding
to “ISO 6498 Animal Feeding Stuffs – Guidelines for Sample Preparation” to replace in
the text “6 Sampling”;
--- Add the No. to the calculation formula according to the requirements of GB/T 1.1-2000.
This Standard replaced GB/T 6439-1992 Method for the Determination of Water-Soluble
Chloride in Feedstuffs.
The major technical differences between this Standard and GB/T 6439-1992 are as follows:
--- Specify in detail the requirements for the analysis steps adopted by different samples;
--- Specify the determination of water-soluble chloride content in feed expressed by sodium
chloride instead of the original standard “sodium chloride” and “chlorine element"”;
--- Add “GB/T 14699.1 Feeding Stuffs - Sampling” and “GB/T 20195 Animal Feeding
Stuffs – Preparation of Test Samples”;
--- Delete the water-soluble chloride rapid titration method (supplement).
Annex A of this Standard is informative.
This Standard was proposed by and under the jurisdiction of National Technical Committee on
Feed Industry of Standardization Administration of China.
Drafting organizations or this Standard: National Feed Quality Supervision and Inspection
Center (Wuhan); and Guangdong Evergreen Conglomerate Co., Ltd.
Determination of Water-Soluble Chlorides in Feeds
1 Scope
This Standard specifies a method for the determination of the water-soluble chlorides content,
expressed as sodium chloride, of animal feeding stuffs.
This Standard is applicable to the determination of water-soluble chlorides content in the animal
feeding stuffs.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced document
applies.
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 14699.1 Feeding Stuffs – Sampling
GB/T 20195 Animal Feeding Stuffs – Preparation of Test Samples
3 Principle
The chlorides present in a test portion are dissolved in water. The solution is clarified if the
product contains organic matter. It is then slightly acidified with nitric acid and the chlorides
are precipitated as silver chloride by means of standard volumetric silver nitrate solution. The
excess silver nitrate is titrated with a standard volumetric solution of ammonium thiocyanate or
potassium thiocyanate.
4 Reagents
Use only reagents of recognized analytical grade.
4.1 Water, complying with at least grade 3 in accordance with GB/T 6682.
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