SN/T 3382-2012 English PDF

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SN/T 3382-2012: Determination of non-protein-nitrogen content in milk and dairy products for export
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3382-2012	159	Add to Cart	3 days	Determination of non-protein-nitrogen content in milk and dairy products for export	Valid

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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: 6,687
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

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
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). ......

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