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GB/T 11066.10-2009: Methods for chemical analysis of gold -- Determination of silicon content -- Molybdenum blue spectrophotometry
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| GB/T 11066.10-2009 | English | 139 |
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Methods for chemical analysis of gold -- Determination of silicon content -- Molybdenum blue spectrophotometry
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GB/T 11066.10-2009
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Basic data | Standard ID | GB/T 11066.10-2009 (GB/T11066.10-2009) | | Description (Translated English) | Methods for chemical analysis of gold -- Determination of silicon content -- Molybdenum blue spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H15 | | Classification of International Standard | 77.040.30 | | Word Count Estimation | 6,682 | | Date of Issue | 2009-04-15 | | Date of Implementation | 2010-02-01 | | 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 acid-soluble silicon. This section applies to the determination of gold in acid soluble silicon content. Measuring range: 0. 0010% Si content to 0. 0050%. | GB/T 11066.10-2009: Methods for chemical analysis of gold -- Determination of silicon content -- Molybdenum blue spectrophotometry
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Methods for chemical analysis of gold. Determination of silicon content. Molybdenum blue spectrophotometry
ICS 77.040.30
H15
National Standards of People's Republic of China
Methods for chemical analysis of gold
Determination of silicon content
Molybdenum blue spectrophotometric method
Posted 2009-04-15
2010-02-01 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 10 sections as follows.
--- 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;
--- GB/T 11066.6 gold chemical analysis of magnesium, nickel, manganese, and palladium contents - Flame atomic absorption spectrometry;
--- GB/T 11066.7 gold chemical analysis of silver, copper, iron, lead, antimony, bismuth, magnesium, nickel, manganese, palladium, tin and chromium contents - fire
Flower atomic emission spectrometry;
--- GB/T 11066.8 gold chemical analysis of silver, copper, iron, lead, antimony, bismuth, magnesium, nickel, manganese, chromium and palladium determining the amount of ethyl acetate
Ester extraction - inductively coupled plasma atomic emission spectrometry;
--- GB/T 11066.9 gold chemical analysis method for determination of arsenic and tin hydride generation - atomic fluorescence spectrometry;
--- GB/T 11066.10 Determination of gold chemical analysis of silicon content - Molybdenum blue spectrophotometric method.
This section GB/T Part of 1,011,066.
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, China Nonferrous Metals Industry Standards and Metrology Institute for Quality.
Participated in the drafting of this section. Beijing Nonferrous Metal Research Institute, Jinchuan Group Co., Ltd., Shenyang Mint Institute of Technology, Changchun Gold
Institute, Tongling Nonferrous Metals Group Company.
The main drafters of this section. Yang Ping, Chen Yun Hung, Yu Shengjie, wide long week, Liu, Dong Liping, Wang Jinping, Jiang Lihong.
Methods for chemical analysis of gold
Determination of silicon content
Molybdenum blue spectrophotometric method
1 Scope
GB/T 11066 provisions of this part of the determination of gold in acid-soluble silicon.
This section applies to the determination of the amount of gold in soluble silicon. Measurement range. Si content 0.0010% to 0.0050%.
2 Method summary
Sample mixed acid is dissolved in dilute acid medium, restore gold with hydroxylamine hydrochloride, separating the matrix elements. Forming silicon and silicon molybdenum heteropoly molybdate
Acid, sulfuric acid and oxalic acid medium with ascorbic acid silicon-molybdenum blue complex heteropoly acid was measured in a spectrophotometer at a wavelength of 810nm
Absorbance at working curve obtained corresponding amount of silicon.
3 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical reagents and secondary distilled water or equivalent purity.
3.1 mixed acid. 1 part of nitric acid (ρ about 1.42g/mL, excellent pure) and 3 parts of hydrochloric acid (ρ about 1.19g/mL, superior grade pure) and 3 parts water
Mix well.
3.2 hydrochloric acid (1 + 1) pure class distinctions.
3.3 hydroxylamine hydrochloride solution (100g/L).
3.4 sulfated (1 + 9) pure class distinctions.
3.5 oxalic acid solution (80g/L).
3.6 ammonium molybdate solution (50g/L). Weigh 50g of ammonium molybdate ((NH4) 6Mo7O24 · 4H2O) was dissolved in 1000mL of water.
3.7 ascorbic acid solution (40g/L). used when the existing service.
3.8 silicon standard stock solution. Weigh 0.1070g of silicon dioxide (SiO2 mass fraction of greater than 99.9%, 120 ℃ drying 2h to cool to room
Temperature), placed in a platinum crucible, 5g of anhydrous sodium carbonate (excellent pure), melting at 950 ℃ ~ 1000 ℃ to red transparent. Coolish hot
Flooding, cooling. The solution is transferred to 500mL volumetric flask with water to volume, and mix. Immediately transferred to a plastic bottle. This solution containing 1mL
100μg silicon.
3.9 Silicon standard solution. Pipette 10.00mL silicon standard stock solution (3.8) in 250mL plastic flask, dilute to the mark, mix
uniform. 1mL solution containing 4μg silicon.
4 Instrument
Spectrophotometer.
5 Sample
Gold prepared crumbs or small pieces with hot hydrochloric acid (3.2) after soaking 15min, washed with ethanol or acetone to dry in a dry
It is in the back.
Step 6 Analysis
6.1 Sample
Weigh 1.00g sample, accurate to 0.0001g.
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