SN/T 0736.5-2010 English PDF

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SN/T 0736.5-2010: Test method of import and export fertilizers. Part 5: Determination of nitrogen content
Status: Valid

SN/T 0736.5: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0736.5-2010	239	Add to Cart	3 days	Test method of import and export fertilizers. Part 5: Determination of nitrogen content	Valid
SN/T 0736.5-1999	359	Add to Cart	3 days	Chemical analysis of fertilizers for import and export. Determination of nitrogen content	Obsolete

Similar standards

SN/T 0736.1   NY/T 1972   NY/T 1971   SN/T 0736.8   SN/T 0736.15   SN/T 0736.10   

Basic data

Standard ID: SN/T 0736.5-2010 (SN/T0736.5-2010)
Description (Translated English): Test method of import and export fertilizers. Part 5: Determination of nitrogen content
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: G20
Word Count Estimation: 9,990
Date of Issue: 2010-11-01
Date of Implementation: 2011-05-01
Older Standard (superseded by this standard): SN/T 0736.5-1999
Quoted Standard: GB/T 601; GB/T 6682; SN/T 0736.1
Regulation (derived from): National Quality Inspection (2010) 582
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the import and export of fertilizer nitrogen content determination. This standard applies to export nitrogenous fertilizer testing.

SN/T 0736.5-2010: Test method of import and export fertilizers. Part 5: Determination of nitrogen content

---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.
Test method of import and export fertilizers Part 5. Determination of nitrogen content People's Republic of China Entry-Exit Inspection and Quarantine Standards Instead of the SN/T 0736.5-1999 Importers and fertilizer testing methods Part 5. Determination of nitrogen content Part 5. Determinationofnitrogencontent Issued on. 2010-11-01 2011-05-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

SN/T 0736 "Importers fertilizer test methods" is divided into 12 sections. --- Part 1. sampling and sample preparation; --- Part 2. Determination of moisture; --- Part 3. Determination of particle size; --- Part 4. Flame atomic absorption spectrometric method for the determination of sodium content; --- Part 5. Determination of nitrogen content; --- Part 6. Determination of phosphorus; --- Part 7. Determination of potassium; --- Part 8. Determination of shrinkage diurea content; --- Part 9. Determination of chlorine content; --- Part 10. Determination of the free acid; --- Part 11. automatic analyzer nitrogen content; --- Part 12. Determination of Arsenic, chromium, cadmium, mercury, lead by Inductively Coupled Plasma Mass Spectrometry. This section SN/T Section 50736 of. This section is amended to SN/T 0736.5-1999 "Determination of the import and export of fertilizer nitrogen content test method" carried out. This section compared with the SN/T 0736.5-1999 The main changes are as follows. --- According to GB/T 1.1-2009 "Standardization Guide Part 1 standard structure and drafting" and GB/T 20001.4- 2001 "Rules for drafting standards - Part 4. Chemical analysis methods," the original standard configuration has been modified. --- Test method distillation, formaldehyde method choreography. --- Add nitrate-containing sample test method, amide nitrogen, melamine nitrogen and ammonia nitrogen in nitrogen content. This section proposed and managed by the National Certification and Accreditation Administration Committee. This section is responsible for drafting unit. People's Republic of China Liaoning Province Exit Inspection and Quarantine. The main drafters of this section. Zhaoxue Rong, Xu Wei, Wu Jianguo, in a vast, Li Xiaolan. This part replaces the standards previously issued as follows. --- ZBG20004-1987; --- SN/T 0736.5-1999. Importers and fertilizer testing methods Part 5. Determination of nitrogen content

1 Scope

SN/T 0736 provisions of this part of the determination of the nitrogen content of the fertilizer import and export. This section applies to the import and export of nitrogenous fertilizer testing.

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 Laboratory use specifications and test methods GB/T 6682 Analysis SN/T 0736.1 fertilizer import and export inspection methods of sampling and sample preparation Preparation 3 samples Press SN/T 0736.1 performed. Test Method 4 4.1 Determination of nitrogen content --- distillation 4.1.1 Application Suitable for containing ammonia nitrogen, nitrate nitrogen, amide nitrogen, and the determination of cyanamide nitrogen fertilizer nitrogen content in the composite. 4.1.2 Principle Sample by nitration or reduction of various forms of nitrogen into ammonia nitrogen, was added excess lye, ammonium salt decomposition, by distillation, the distilled Ammonia with an excess of standard solution of sulfuric acid to absorb and then back titration with standard sodium hydroxide solution. 4.1.3 Reagents and materials Unless otherwise indicated, the reagents used were of analytical grade water to comply with GB/T 6682 requirements for laboratory use third grade water. 4.1.3.1 sulfate. a density of 1.84g/mL. 4.1.3.2 hydrochloride. a density of 1.19g/mL. 4.1.3.3 Chromium powder. fineness of less than 250μm. 4.1.3.4 De Wada alloy (Cu50. Al45. Zn5). ground to about 20 mesh (the fineness of less than 850μm). 4.1.3.5 potassium sulfate. 4.1.3.6 copper sulfate pentahydrate. 4.1.3.7 Mixed Catalyst. 50g to 1000g of potassium sulfate and copper sulfate pentahydrate thoroughly mixed and ground carefully. ......

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