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GB/T 23274.6-2009: Methods for chemical analysis of stannic oxide -- Part 6: Determination of sulfate content -- Visual turbidimetry method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23274.6-2009 | English | 149 |
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Methods for chemical analysis of stannic oxide -- Part 6: Determination of sulfate content -- Visual turbidimetry method
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GB/T 23274.6-2009
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Basic data | Standard ID | GB/T 23274.6-2009 (GB/T23274.6-2009) | | Description (Translated English) | Methods for chemical analysis of stannic oxide -- Part 6: Determination of sulfate content -- Visual turbidimetry method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G10 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 5,557 | | Date of Issue | 2009-01-05 | | Date of Implementation | 2009-11-01 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.2 (Total No.142) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of tin dioxide Sulfate. This section applies to the determination of tin dioxide sulfate. Measuring range of 0. 030% to 0. 60 %. | GB/T 23274.6-2009: Methods for chemical analysis of stannic oxide -- Part 6: Determination of sulfate content -- Visual turbidimetry method
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Methods for chemical analysis of stannic oxide Part 6. Determination of sulfate content Visual turbidimetry method
ICS 71.040.40
G10
National Standards of People's Republic of China
Methods for chemical analysis of tin dioxide
Part 6. Determination of sulfate
Visible turbidimetric method
Posted 2009-01-05
2009-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 23274-2009 "Methods for chemical analysis of tin dioxide" is divided into eight sections.
--- Part 1. Determination of the amount of tin oxide potassium iodate titration;
--- Part 2. Determination of iron content - 1,10-phenanthroline spectrophotometry;
--- Part 3. Determination of arsenic content of arsenic and antimony molybdenum blue spectrophotometric method;
--- Part 4. lead and copper contents - Flame atomic absorption spectrometry;
--- Part 5. Determination of antimony content - Malachite green spectrophotometry;
--- Part 6. Determination of sulfate Visible turbidimetric method;
--- Part 7. hydrochloric acid soluble Gravimetric method;
--- Part 8. Loss on ignition - Gravimetric method.
Part is divided into 6 sections.
This part is proposed by the China Nonferrous Metals Industry Association.
The non-ferrous metal part by the National Standardization Technical Committee.
This section from Yunnan Tin Group Co., Ltd. is responsible for drafting.
This section is Liuzhou China Tin Group Co., Ltd., Yunnan Honghe SAIEC IQ participate in the drafting.
The main drafters of this section. Highland, Zhang Limei, cream Lin Jiang Village stretch, Shou Jie cloud, Zhang.
Methods for chemical analysis of tin dioxide
Part 6. Determination of sulfate
Visible turbidimetric method
1 Scope
This section GB/T 23274.6 specifies the method for determination of tin dioxide sulfate.
This section applies to the determination of sulfate in tin dioxide, measured in the range of 0.030% to 0.60%.
2 Method summary
Sample decomposition with sodium hydroxide melt, hydrochloric acid leaching in acidic medium, add barium chloride to generate white precipitate barium sulfate, visually matching
Turbidity measurement.
3 Reagents
Test water are a distilled water.
3.1 Sodium hydroxide (GR).
3.2 hydrochloride (ρ1.19g/mL).
3.3 HCl (1 + 1).
3.4 ethanol.
3.5 barium chloride solution (250g/L). Use filtered.
3.6 sulfate standard stock solution. Weigh 0.1480g anhydrous sodium sulfate (at 105 ℃ ~ 110 ℃ drying to constant weight) dissolved in water and transferred to
1000mL volumetric flask, and dilute to volume, and mix. This solution 1mL containing 100μg sulfate (SO4
2-).
3.7 sulfate standard solution. Pipette 50.00mL sulfate standard stock solution (3.6) in 100mL flask, diluted with water to the mark
Degree, and mix. This solution 1mL containing 50μg sulfate (SO4
2-).
3.8 sulfate standard solution. Pipette 50.00mL sulfate standard stock solution (3.6) in 500mL volumetric flask, dilute to the mark with water
Degree, and mix. This solution 1mL containing 10μg sulfate (SO4
2-).
4 Sample
The sample should be sealed packaging.
Step 5 Analysis
5.1 Determination of the number of
Independently two determinations, the mean value.
5.2 blank test
Along with sample blank test.
5.3 Determination
5.3.1 Weigh 0.5g sample (m1), accurate to 0.0001g, placed in pre-filled with 1g of sodium hydroxide (3.1) of 30mL silver crucible,
Then covered with 1g of sodium hydroxide (3.1, if you need to cover larger particles 2g). Moved to 400 ℃ high temperature furnace, heated to 600 ℃ decomposition
10min, then cool. Blowing about 5mL water in a silver crucible, placed in a heating until completely dissolved melt on a hot plate.
5.3.2 the test solution with a small amount of water transferred to 100mL beaker was added 10mL of hydrochloric acid (3.2), was heated to a clear test solution, after cooling transferred
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