SN/T 0546-2015 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0546-2015	359	Add to Cart	3 days	Determination of calcium oxide, magnesium oxide and sulfur content in kieserite for export - Volumetric method	Obsolete
SN/T 0546-2004	319	Add to Cart	3 days	Export sulfur kainite calcium oxide, magnesium oxide and sulfur content determination method	Obsolete
SN/T 0546-1996	279	Add to Cart	3 days	Test method of calcium oxide, magnesium oxide and sulfur content in kieserite for export	Obsolete

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GB/T 1615   SH/T 1499.3   SH/T 1499.2   

Basic data

Standard ID: SN/T 0546-2015 (SN/T0546-2015)
Description (Translated English): Determination of calcium oxide, magnesium oxide and sulfur content in kieserite for export - Volumetric method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: G14
Classification of International Standard: 71.060
Word Count Estimation: 9,912
Date of Issue: 2015-09-02
Date of Implementation: 2016-04-01
Older Standard (superseded by this standard): SN/T 0546-2004
Quoted Standard: GB/T 603; GB/T 6679; GB/T 6682
Regulation (derived from): AQSIQ Announcement 2015 - Batch 3 - 103 Industry Standards
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the method for determination of export kieserite in acid-soluble calcium oxide, acid-soluble magnesium oxide, calcium oxide water-soluble, water-soluble magnesium oxide and sulfur content CyDTA complexometric titration. This standard applies to light burning magnesium with sulfuric acid and prepared kieserite in acid-soluble calcium oxide, acid-soluble magnesium oxide, calcium oxide water-soluble, water-soluble magnesium oxide and sulfur determination, measurement range: magnesium oxide content of 10% ~ 30%; calcium oxide content of <2%; sulfur content of 8% to 24%.

SN/T 0546-2004: Export sulfur kainite calcium oxide, magnesium oxide and sulfur content determination method

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Export sulfur kainite calcium oxide, magnesium oxide and sulfur content determination method People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Replace SN/T 0546-1996 Export of calcium oxide, magnesium oxide and sulfur in sulphur magnesium Method of determination Released on June.2004 Implementation of.2004-12-01 People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard replaces SN/T 0546-1996 "Determination of Calcium Oxide, Magnesium Oxide and Sulfur Content in Exported Magnesium Sulfide". The main differences between this standard and SN/T 0546-1996 are as follows. --- Increased sample preparation terms; --- indicator changed from solid to liquid; --- Complexometric titrant with cyclohexanediaminetetraacetic acid (CyDTA) standard titration solution instead of disodium edetate (EDTA) standard Titrate the solution. Appendix A of this standard is a normative appendix. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted by the Tianjin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Sun Shujun, Liu Shaocong, Zhang Lai, Liu Jun, Ma Jun. The original SN/T 0546-1996 was first released in.1996. Export of calcium oxide, magnesium oxide and sulfur in sulphur magnesium Method of determination

1 Scope

This standard specifies the determination of calcium oxide, magnesium oxide and sulfur in the export of sulphur magnesium. This standard applies to magnesium sulphate produced by the reaction of light burnt magnesium with sulfuric acid.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. Preparation of preparations and products used in GB/T 603 chemical reagent test method GB/T 6679 Solid Chemicals Sampling General (neq ISO /DIS8213)

3 sampling and sample preparation

3.1 Sampling According to the method specified in GB/T 6679. 3.2 Sample preparation The sample taken is thoroughly mixed, and the sample is divided by a cone or a dichotomy method, and about 1000 g is taken out, and both are divided into two parts, one for inspection. Use, one for retention. The granular sample and the mixed sample were quickly ground to pass through 40 mesh (mesh 0.42 mm). Should pay attention to prevent loss during the grinding process Water or water. After grinding, mix thoroughly and place in a ground glass bottle.

4 Test methods

4.1 General provisions Unless otherwise stated, only analytically pure reagents and distilled or deionized water or water of comparable purity were used in the analysis. test The preparations and products required in the preparation are prepared according to the provisions of GB/T 603 when there are no other regulations. 4.2 Reagents 4.2.1 Hydrochloric acid. ρ = 1.19 g/mL. 4.2.2 Hydrochloric acid solution. 1+9. 4.2.3 Potassium hydroxide solution..200g/L. 4.2.4 Potassium tartrate sodium solution. 50g/L. 4.2.5 Triethanolamine solution. 1+1. 4.2.6 Triethanolamine solution. 1+4. 4.2.7 Ethylene glycol diethyl ether diamine tetraacetic acid (EGTA) solution. 2.5 g/L. Weigh 2.5g EGTA, place it in a 400mL beaker, add 100mL of water, add potassium hydroxide (4.2.3) dropwise until the solution is clear and transparent, cold After room temperature, it was diluted to 1 L with water. 4.2.8 Ammonia-ammonium chloride buffer solution A. pH ≈10. 4.2.9 Cyclohexanediaminetetraacetic acid (CyDTA) standard titration solution. 0.025mol/L, configuration and calibration see Appendix A. ......

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