SN/T 0546: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0546-2015 | English | 359 |
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Determination of calcium oxide, magnesium oxide and sulfur content in kieserite for export - Volumetric method
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SN/T 0546-2015
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| SN/T 0546-2004 | English | 319 |
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Export sulfur kainite calcium oxide, magnesium oxide and sulfur content determination method
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SN/T 0546-2004
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| SN/T 0546-1996 | English | 279 |
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Test method of calcium oxide, magnesium oxide and sulfur content in kieserite for export
| Obsolete |
SN/T 0546-1996
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PDF similar to SN/T 0546-2015
Standard similar to SN/T 0546-2015 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Count Estimation | 9,912 | | Date of Issue | 2015-09-02 | | Date of Implementation | 2016-04-01 | | Older Standard (superseded by this standard) | SN/T 0546-2004 | | Quoted Standard | GB/T 603; GB/T 6679; GB/T 6682 | | Regulation (derived from) | AQSIQ Announcement 2015 - Batch 3 - 103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
---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.
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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