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Ferromanganese-silicon for import and export. Determination of manganese content. Perchloric acid oxidize ammonium ferrous sulfate titrimetric method
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Standard similar to SN/T 3517-2013 SN/T 5268 | Basic data | Standard ID | SN/T 3517-2013 (SN/T3517-2013) | | Description (Translated English) | Ferromanganese-silicon for import and export. Determination of manganese content. Perchloric acid oxidize ammonium ferrous sulfate titrimetric method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Word Count Estimation | 7,716 | | Quoted Standard | GB/T 6379.2; GB/T 6682-2008 | | Regulation (derived from) | ?AQSIQ About publishing 2013 First Batch 179-items Entry-Exit Inspection and Quarantine industry standard Announcement; Industry-Standard-Filing Announcement 2013 No. 9 (Total No. 165) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the method for determination of perchloric acid oxidation of ferrous ammonium sulfate titration silicon manganese alloy of manganese content. This standard applies to the determination of manganese silicon alloy of manganese conten | SN/T 3517-2013: Ferromanganese-silicon for import and export. Determination of manganese content. Perchloric acid oxidize ammonium ferrous sulfate titrimetric method
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Ferromanganese-silicon for import and export. Determination of manganese content. Perchloric acid oxidize ammonium ferrous sulfate titrimetric method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Determination of the import and export of manganese silicon alloy of manganese content
Perchloric acid oxidation of ferrous ammonium sulfate titration
Issued on. 2013-03-01
2013-09-16 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 Jiangsu Entry-Exit Inspection and Quarantine Bureau.
The main drafters of this standard. Yu Lu, Wu Cheng, Xu Yuyu, a new kingdom, Liu Feng, Wang Hui, Hu Qing.
Determination of the import and export of manganese silicon alloy of manganese content
Perchloric acid oxidation of ferrous ammonium sulfate titration
1 Scope
This standard specifies the method for determination of ferrous ammonium sulfate oxidized by perchloric titration silicon manganese alloy of manganese content.
This standard applies to the determination of manganese silicon alloy of manganese content measurement range (mass fraction) of 55% to 75%.
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 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat
Of the basic methods of reproduction
GB/T 6682-2008 analytical laboratory use specifications and test methods
3 Method summary
Sample with nitric acid, phosphoric acid after the decomposition, in phosphoric acid, perchloric acid manganese oxide to trivalent to N- benzene-generation anthranilic acid as meaning
It shows agents, ferrous ammonium sulfate standard titration solution titration, calculated from the standard titration solution consumption of manganese content.
4 Reagents
Unless otherwise indicated, the reagents used were of analytical grade, water as a secondary water GB/T 6682-2008 requirements.
4.1 phosphoric acid (ρ = 1.70g/mL).
4.2 nitric acid (ρ = 1.42g/mL).
4.3 perchloric acid (ρ = 1.67g/mL).
4.4 Potassium dichromate standard titration solution
c (1/6K2Cr2O7) = 0.06400mol/L. Weigh 3.1379g baseline potassium dichromate (previously placed in 150 ℃ drying 2h dry
Dryer cooled to room temperature), dissolved in water transferred to 1000mL volumetric flask, dilute with water to volume, and mix.
4.5 ferrous ammonium sulfate standard titration solution (about 0.064mol/L)
4.5.1 preparation. Weigh 25.10g ferrous ammonium sulfate [(NH4) 2Fe (SO4) 2 · 6H2O], dissolved and diluted sulfuric acid (595) to
1000mL, and mix.
4.5.2 Calibration. Pipette 25.00mL potassium dichromate standard titration solution (4.4) 2 parts in 250mL conical flask, add 20mL sulfuric acid
(1 3), 5mL phosphoric acid (4.1), ammonium ferrous sulfate standard titration solution (4.5.1) titration, add 2 drops of benzene on behalf of N- anthranilic near the end
Formic acid indicator solution (4.7) and continue titration solution purple to green is the end. 2 parts of solution consumed ferrous ammonium sulfate standard
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