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GB/T 11066.3-2008: Methods for chemical analysis of gold -- Determination of iron content -- Flame atomic absorption spectrometry
Status: Valid GB/T 11066.3: Evolution and historical versions
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| GB/T 11066.3-2008 | English | 139 |
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Methods for chemical analysis of gold -- Determination of iron content -- Flame atomic absorption spectrometry
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GB/T 11066.3-2008
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| GB/T 11066.3-1989 | English | 199 |
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Gold--Determination of iron content--Flame atomic absorption spectrometric method
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GB/T 11066.3-1989
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Basic data | Standard ID | GB/T 11066.3-2008 (GB/T11066.3-2008) | | Description (Translated English) | Methods for chemical analysis of gold -- Determination of iron content -- Flame atomic absorption spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H68 | | Classification of International Standard | 77.150.99 | | Word Count Estimation | 6,674 | | Date of Issue | 2008-06-09 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 11066.3-1989 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.9 (Total No.122) | | Issuing agency(ies)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 method for the determination of gold in iron content. This section applies to the determination of gold in iron content. Measurement range: 0. 0005% to 0. 0080%. | GB/T 11066.3-2008: Methods for chemical analysis of gold -- Determination of iron content -- Flame atomic absorption spectrometry
---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 gold. Determination of iron content. Flame atomic absorption spectrometry
ICS 77.150.99
H68
National Standards of People's Republic of China
Replacing GB/T 11066.3-1989
Methods for chemical analysis of gold
Determination of iron content by flame atomic absorption spectrometry
Posted 2008-06-09
2008-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 11066 "Methods for chemical analysis of gold" is divided into the following 10 sections.
--- GB/T 11066.1 gold chemical analysis method of determining the amount of gold fire assay;
--- GB/T 11066.2 gold chemical analysis of silver content - Flame atomic absorption spectrometry;
--- GB/T 11066.3 gold chemical analysis of iron content by flame atomic absorption spectrometry;
--- Flame atomic GB/T 11066.4 gold chemical analysis of copper, lead and bismuth contents absorption spectrometry;
--- GB/T 11066.5 gold chemical analysis method for determination of atomic silver, copper, iron, lead, antimony and bismuth amount of emission spectrometry;
--- Flame atomic GB/T 11066.6 gold chemical analysis of iron, nickel, manganese, and palladium absorption spectrometry;
--- GB/T 11066.7 gold chemical analysis of silver, copper, iron, lead, antimony, bismuth, palladium, magnesium, tin, nickel, manganese and chromium contents - fire
Flower atomic emission spectrometry;
--- GB/T 11066.8 gold chemical analysis of silver, copper, iron, lead, antimony, bismuth, palladium, magnesium, nickel, manganese and chromium contents - ethyl acetate
Ester extraction -ICP-AES method;
--- GB/T 11066.9 gold chemical analysis method for determination of arsenic and tin hydride - atomic fluorescence spectrometry;
--- GB/T 11066.10 chemical analysis of gold - Determination of silicon content of silicon molybdenum blue spectrophotometric method.
This is Part 3.
This Part replaces GB/T 11066.3-1989 "gold chemical analysis by flame atomic absorption spectrometry determination of iron content spectrum." versus
GB/T 11066.3-1989 compared, this section has the following changes.
--- Instrument requirements, sensitivity to the characteristic concentration;
--- Instead of using precision allowable difference;
--- Increased quality assurance and control provisions.
This part is proposed by the China Nonferrous Metals Industry Association.
The non-ferrous metal part by the National Standardization Technical Committee.
This section is responsible for drafting unit. Chengdu Banknote Printing Company.
This section is drafted. Beijing Mining Research Institute, Chengdu Banknote Printing Company.
Participated in the drafting of this section. Shanghai Mint, Shenyang Mint Institute of Technology, Jiangxi Copper Company, Zijin Copper Group, Hubei Daye
Nonferrous Metals Group, and the National Gold and Silver Products Quality Supervision and Inspection Center.
The main drafters of this section. Fu Bin, Tangshu Fang, Lihua Chang, Chen Jie, Wang Zisen, Xing Guizhen, Ma Yuqin, Liu Feng.
This part certifier. Gao Ying Jian, Jiang Tao demand.
This part of the standard replaces the previous editions are.
--- GB/T 11066.3-1989.
Methods for chemical analysis of gold
Determination of iron content by flame atomic absorption spectrometry
1 Scope
This section provides the determination of gold in iron content.
This section applies to the determination of gold in iron content. Measurement range. 0.0005% to 0.0080%.
2 Method summary
Sample decomposition with aqua regia, in 1mol/L HCl medium, separation of gold extracted with ethyl acetate, made of concentrated hydrochloric acid aqueous phase (1 + 19) to be
Test solution, using air - acetylene flame atomic absorption spectrometer wavelength 248.3nm measured absorbance iron.
3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
3.1 hydrochloric acid (ρ about 1.19g/mL), pure class distinctions.
3.2 hydrochloric acid (1 + 11).
3.3 hydrochloric acid (1 + 19).
3.4 nitric acid (ρ about 1.42g/mL), pure class distinctions.
Dilute aqua regia 3.5. 1 to 3 parts of nitric acid and hydrochloric acid and 3 parts of water and mix.
3.6 ethyl acetate.
3.7 iron standard stock solution. Weigh 0.7149g ferric oxide (excellent pure), low-temperature heating was dissolved in 100mL of hydrochloric acid (3.1), cooled
To room temperature, water and transferred to 1000mL volumetric flask and dilute to volume, and mix. This solution 1mL containing 500μg iron.
3.8 iron standard solution. Pipette 25.00mL iron standard stock solution (3.7) in 1000mL volumetric flask, dilute to the mark with hydrochloric acid (3.3)
Degree, and mix. This solution 1mL containing 12.5μg iron.
4 Instrument
Atomic absorption spectrometer, with iron hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
--- Characteristic mass concentration. In line with the measurement of test solution matrix solution features quality iron concentration should be less than
0.079μg/mL.
--- Linear curve. the mass concentration curve divided into five sections, the difference between the absorbance difference between the highest and the lowest absorbance segment segment
The ratio shall be not less than 0.85.
--- Precision. measuring the absorbance of the standard solution 10 times the highest concentration of the standard deviation should not exceed the average absorbance
1%; absorbance measured 10 times the minimum concentration of the standard solution (not a "zero" standard solution), and the standard deviation should not exceed
0.5% of the highest average concentration of the standard solution absorbance.
--- Recommended for P-E1100 atomic absorption spectrometer Iron reference operating conditions are shown in Table 1.
Table 1
Wavelength/nm lamp current/mA monochromator passband/nm observation height/mm acetylene flow/(L/min) air flow rate/(L/min)
10 248.3 0.2 8.0 0.9 5.5
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