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GB/T 23274.4-2009: Methods for chemical analysis of stannic oxide -- Part 4: Determination of lead and copper content -- Flame atomic absorption spectrometric method
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| GB/T 23274.4-2009 | English | 139 |
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Methods for chemical analysis of stannic oxide -- Part 4: Determination of lead and copper content -- Flame atomic absorption spectrometric method
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GB/T 23274.4-2009
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Basic data | Standard ID | GB/T 23274.4-2009 (GB/T23274.4-2009) | | Description (Translated English) | Methods for chemical analysis of stannic oxide -- Part 4: Determination of lead and copper content -- Flame atomic absorption spectrometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G10 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 6,617 | | 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 tin dioxide lead, determination of copper content. This section applies to tin oxide of lead, Determination of copper content. Measurement range is 0. 0050% ~ 0. 060% lead, copper 0. 00050% to 0. 020 %. | GB/T 23274.4-2009: Methods for chemical analysis of stannic oxide -- Part 4: Determination of lead and copper content -- Flame atomic absorption spectrometric 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.
Methods for chemical analysis of stannic oxide Part 4. Determination of lead and copper content Flame atomic absorption spectrometric method
ICS 71.040.40
G10
National Standards of People's Republic of China
Methods for chemical analysis of tin dioxide
Part 4. lead, copper content determination
Flame Atomic Absorption Spectrometry
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.
This is Part 4.
Appendix A of this section is an informative annex.
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. Honghe SAIEC IQ participate in the drafting.
The main drafters of this section. Dingxi Bo, Xu Dengqiong, ginger Kau glass, of Liu Sheng, Lin cream, Jiang Village stretch, Lee Road show, Zhang Jing.
Methods for chemical analysis of tin dioxide
Part 4. lead, copper content determination
Flame Atomic Absorption Spectrometry
1 Scope
This section GB/T 23274 specifies the method for the determination of tin dioxide, lead, copper content.
This section applies to the determination of tin oxide of lead, copper content, the determination of lead in the range of 0.0050% to 0.060% copper 0.00050% ~
0.020%.
2 Method summary
Sample decomposition with aqua regia, in 10% aqua regia medium flame atomic absorption spectrometer, with air - acetylene flame measured.
3 Reagents
Test water for the three distilled water.
Nitrate 3.1 (ρ1.42g/mL).
3.2 hydrochloride (ρ1.19g/mL).
3.3 aqua regia.
3.4 lead standard stock solution. Weigh 0.5000g metallic lead (Pb mass fraction ≥99.999%), placed in 200mL beaker, add
20mL of nitric acid (1 + 2), heat gently to dissolve, remove the cooled and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution
1mL containing 500μg lead.
3.5 Lead standard solution. Pipette 20.0mL lead standard stock solution (3.4) in 200mL flask, add 5mL hydrochloric acid (3.2), with
Dilute with water to volume, and mix. This solution 1mL containing 50μg lead.
3.6 Copper Standard stock solution. Weigh 0.5000g copper (mass fraction of copper ≥99.999%), placed in 200mL beaker, add
20mL of nitric acid (1 + 1), heat gently to dissolve, remove the cooled and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution
1mL containing 500μg copper.
3.7 Copper Standard Solution. Pipette 20.0mL copper standard stock solution (3.6) in 1000mL volumetric flask, was added 5mL hydrochloric acid (3.2),
Dilute with water to volume, and mix. This solution 1mL containing 10μg copper.
4 Instrument
Atomic absorption spectrometer, with lead, copper hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
--- Characteristic concentration. a solution in the matrix is \u200b\u200bconsistent with the measured solution, characteristic concentration of lead should not exceed 0.12μg/mL, the characteristics of copper
Concentration should not exceed 0.03μg/mL.
--- Precision. measure 10 times the absorbance of the highest concentration of the standard solution, the standard deviation should not exceed 1% of the average absorbance; with
The lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum concentration
0.5% of the mean absorbance of the standard solution.
--- Linear curve. A standard curve is divided into five sections according to concentration, absorbance difference of the absorbance difference between the highest and the lowest segment segment
Ratio of not less than 0.7.
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