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SN/T 0313-2014: Determination of molybdenum in steel for import and export. 8-hydroxyquinoline gravimetric after separation with thioacetamide
Status: Valid SN/T 0313: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0313-2014 | English | 209 |
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Determination of molybdenum in steel for import and export. 8-hydroxyquinoline gravimetric after separation with thioacetamide
| Valid |
SN/T 0313-2014
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| SN/T 0313-1994 | English | 199 |
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Chemical analysis of import and export steel. Method for thedetermination of molybdenum by 8-hydroxyquinolinegravimetric after separation with thioacetamide
| Obsolete |
SN/T 0313-1994
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PDF similar to SN/T 0313-2014
Basic data | Standard ID | SN/T 0313-2014 (SN/T0313-2014) | | Description (Translated English) | Determination of molybdenum in steel for import and export. 8-hydroxyquinoline gravimetric after separation with thioacetamide | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | H40 | | Classification of International Standard | 77.140.01 | | Word Count Estimation | 8,841 | | Older Standard (superseded by this standard) | SN/T 0313-1994 | | Quoted Standard | GB/T 6682-2008; GB/T 20066 | | Regulation (derived from) | AQSIQ notification issued in 2014 on the first batch of 230 industry-standard entry-exit inspection and quarantine | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the test methods in the import and export of steel molybdenum content. This standard applies to the import and export of steel heat-resistant steel, stainless steel, molybdenum high-speed tool steel determination, measurement range | SN/T 0313-2014: Determination of molybdenum in steel for import and export. 8-hydroxyquinoline gravimetric after separation with thioacetamide
---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.
(Import and export of steel molybdenum content - Determination - thioacetamide separate 8 - hydroxy quinoline gravimetric method)
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Instead of the SN/T 0313-1994
Determination of molybdenum content in steel import and export
Thioacetamide separate 8-hydroxy quinoline gravimetric method
Issued on. 2014-01-13
2014-08-01 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.
Instead of the standard SN/T 0313-1994 "Methods for chemical analysis of import and export of steel thioacetamide separate 8-hydroxy quinoline measured gravimetric method
Fixed molybdenum ", compared with the SN/T 0313-1994, in addition to editorial changes, the major technical changes are as follows.
--- The title changed to "import and export of steel Molybdenum Determination thioacetamide separate 8-hydroxy quinoline gravimetric method", the corresponding English
The title modified;
--- Added "Normative references 2, 5 instruments, sample preparation 6" subsequent sections renumbered accordingly adjusted;
--- The "reagent 3" to "4 reagent" normative content adjustment, and increased reagent preparation methods section, followed by series
Numbers were adjusted accordingly;
--- The "3.11 ammonia (ρ1.15g/mL)" to "4.6 ammonia water (ρ = 0.91g/mL)";
--- The "3.13 edetate disodium (EDTA) solution (1%)" to "4.19 ethylene diamine tetra-acetic acid (EDTA) solution";
--- The "4.4.1 A sample (4.1) into a beaker of 100mL" to "7.2.1 sample (7.1) into 250mL beaker";
--- The "4.4.4 solution of ammonia (3.12)" with "7.2.4 solution of ammonia (4.6)";
--- "5 Calculation results of the analysis" section of the specification adjustment.
This standard by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Hubei Exit Inspection and Quarantine.
The main drafters of this standard. Wang Fan, Ling about Tao, Guoshao Fei, Wang Hui, Yang wind, Lin Fei, Shuai.
This standard replaces the standards previously issued as follows.
--- SN/T 0313-1994.
Determination of molybdenum content in steel import and export
Thioacetamide separate 8-hydroxy quinoline gravimetric method
1 Scope
This standard specifies the test methods in the import and export of steel molybdenum content.
This standard applies to the import and export of steel heat-resistant steel, stainless steel, molybdenum high-speed tool steel to the determination, measurement range. 2.00%
8.00%.
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.
GB/T 6682-2008 analytical laboratory use specifications and test methods
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
Principle 3
Sample was dissolved in aqua regia, dropping a small amount of hydrofluoric acid, perchloric acid heightening smoke, tartaric acid as a complexing agent, with ammonia dissolved molybdic acid, tungstic acid, in
0.5mol/L sulfuric acid medium with thioacetamide precipitate molybdenum sulfide and molybdenum separation and impurity elements, with sulfuric acid and nitric acid to dissolve molybdenum sulfide,
In the presence of EDTA, control acidity pH3.5 ~ 4.0, with 8-hydroxy quinoline molybdenum precipitation, the precipitate was dried to constant weight to give the percentage of molybdenum
CONTENT.
Test solution in tungsten content 45mg, titanium content 15mg, vanadium 15mg, niobium 10mg, 10mg or less copper content does not interfere with the determination.
4 Reagents
Unless otherwise indicated, the reagents used were of analytical grade, water GB/T 6682-2008 in tertiary water.
4.1 disodium edetate.
4.2 thioacetamide.
4.3 ammonium acetate.
4.4 8-hydroxyquinoline.
4.5 tartaric acid.
Aqueous ammonia 4.6 (ρ = 0.91g/mL).
4.7 Glacial acetic acid (ρ = 1.05g/mL).
4.8 Hydrofluoric acid (ρ = 1.15g/mL).
4.9 hydrochloric acid (ρ = 1.19g/mL).
4.10 Nitrate (ρ = 1.42g/mL).
4.11 sulfate (ρ = 1.84g/mL).
4.12 perchloric acid (ρ = 1.67g/mL).
4.13 hydrochloric acid (11). Measure 50mL of hydrochloric acid (4.9), was mixed with 50mL water.
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