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Determination of non-protein-nitrogen content in milk and dairy products for export
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Basic data
| Standard ID | SN/T 3382-2012 (SN/T3382-2012) |
| Description (Translated English) | Determination of non-protein-nitrogen content in milk and dairy products for export |
| Sector / Industry | Commodity Inspection Standard (Recommended) |
| Classification of Chinese Standard | X16 |
| Classification of International Standard | 67.100.01 |
| Word Count Estimation | 6,696 |
| Date of Issue | 12/12/2012 |
| Date of Implementation | 7/1/2013 |
| Quoted Standard | GB/T 601; GB/T 602; GB 5009.5; GB/T 6682 |
| Regulation (derived from) | State-Quality-Inspection-accreditation (2012) 777 |
| Issuing agency(ies) | General Administration of Customs |
| Summary | This standard specifies the method for determination of milk and milk products nonprotein nitrogen content. This standard applies to milk, milk powder was measured nonprotein nitrogen content. |
SN/T 3382-2012: Determination of non-protein-nitrogen content in milk and dairy products for export
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Determination of non-protein-nitrogen content in milk and dairy products for export
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Determination of export of milk and milk nonprotein nitrogen content
Issued on. 2012-12-12
2013-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Yunnan Exit Inspection and Quarantine.
The main drafters of this standard. Li Yunfei, Pengyun Xia, Ma Xiaogang, Yangling Chun, bright red, Shao Yingying.
Determination of export of milk and milk nonprotein nitrogen content
1 Scope
This standard specifies the method for determination of milk and milk products nonprotein nitrogen content.
This standard applies to milk, milk powder measured nonprotein nitrogen content.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Preparation of GB/T 601 chemical reagent standard titration solution
Preparation of standard volumetric solutions GB/T 602 Determination of impurities in chemical reagents
GB 5009.5 Determination of national food safety standards in food protein
Laboratory use specifications and test methods GB/T 6682 Analysis
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Non-protein nitrogen content of non-protein-nitrogencontent
Protein content other than nitrogen.
4 Method summary
Milk protein precipitation with acetone, the filtrate was concentrated to near dryness in a water bath, after digestion, distillation, with 0.05mol/L sulfuric acid titration, calculation of non-protein nitrogen
content.
5 Reagents and materials
Unless otherwise specified, the reagents used were of analytical grade.
5.1 Water. GB/T 6682 provided a water.
5.2 acetone.
5.3 copper sulfate (CuSO4 · 5H2O).
5.4 potassium sulfate (K2SO4).
5.5 sulfuric acid (H2SO4 density of 1.84g/L).
5.6 boric acid (H3BO3).
5.7 methyl red indicator (C15H15N3O2).
5.8 bromocresol green indicator (C21H14Br4O5S).
5.9 Methylene blue indicator (C16H18CIN3S · 3H2O).
...
