GB/T 29509.2-2013 English PDF

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GB/T 29509.2-2013: Methods for chemical analysis of gold-loaded carbon -- Part 2: Determination of silver content -- Flame atomic absorption spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 29509.2-2013	169	Add to Cart	3 days	Methods for chemical analysis of gold-loaded carbon -- Part 2: Determination of silver content -- Flame atomic absorption spectrometry	Valid

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GB/T 42333   GB/T 20899.1   YS/T 254.1   GB/T 20899.9   GB/T 20899.10   GB/T 29509.1   

Basic data

Standard ID: GB/T 29509.2-2013 (GB/T29509.2-2013)
Description (Translated English): Methods for chemical analysis of gold-loaded carbon -- Part 2: Determination of silver content -- Flame atomic absorption spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D46
Classification of International Standard: 73.060.99
Word Count Estimation: 7,713
Regulation (derived from): National Standards Bulletin 2013 No. 6
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 loaded carbon Determination of silver content. This section applies to loaded carbon in silver content. Measuring range: 10. 0 g/t ~ 2 500. 0g/t.

GB/T 29509.2-2013: Methods for chemical analysis of gold-loaded carbon -- Part 2: Determination of silver 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-loaded carbon Part 2... Determination of silver content Flame atomic absorption spectrometry ICS 73.060.99 D46 National Standards of People's Republic of China Loaded carbon chemical analysis Part 2. Determination of silver content Flame Atomic Absorption Spectrometry Part 2. Determinationofsilvercontent- Issued on. 2013-05-09 2014-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 29509 "Methods for chemical analysis of gold-loaded carbon" is divided into two parts. --- Part 1. Determination of gold content; Fire assay gravimetric method Flame Atomic Absorption Spectrometry --- Part 2. Determination of silver content - Flame atomic absorption spectrometry. This is Part 2 GB/T 29509 of. This section drafted in accordance with GB/T 1.1-2009 given rules. This part of the National Gold Standardization Technical Committee (SAC/TC379) and focal points. This section is drafted. Changchun Gold Research Institute, Zijin Mining Group Co., Lingbao Gold Company Ltd., Shandong NUS Gold Co Ltd, Tongguan Gold Smelting Co., Ltd., Henan Zhongyuan gold smelter limited liability company. The main drafters of this section. Chen Feifei, Chen Yonghong, Meng Xianwei, Wang Ju, Lan Mei E, Liu Zhiqiang, Li snow, Pengfei, Zhu Yansheng, Ling strong, Tie bolt, Liu Chengxiang. Loaded carbon chemical analysis Part 2. Determination of silver content Flame Atomic Absorption Spectrometry

1 Scope

This section GB/T 29509 specifies the method for the determination of silver loaded carbon content. This section applies to the determination of gold contained in the silver content of carbon. Measuring range. 10.0g/t ~ 2500.0g/t.

2 Method summary

Sample by post-ash, hydrochloric acid, nitric acid dissolved in dilute hydrochloric acid medium, using air - acetylene flame to flame atomic absorption spectrometer wave Determination of absorbance at 328.1nm long silver, calculated according to the standard curve loaded carbon in the amount of silver. Deduct background absorption, loaded carbon coexist elements do not interfere with the determination.

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 = 1.19g/mL). 3.2 nitric acid (ρ = 1.42g/mL). 3.3 nitric acid (ρ = 1.42g/mL), pure class distinctions. 3.4 hydrochloride (317). 3.5 with saturated sodium chloride solution. 3.6 silver standard stock solution. Weigh 0.5000g Silver (mass fraction ≥99.99%), placed in 100mL beaker, add 20mL nitrate Acid (3.3), and heated to dissolve completely, purge nitrogen oxides boiling, remove cooling, chlorine ions are not transferred to the water capacity 1000mL brown Flask, 30mL of nitric acid (3.3), dilute to the mark and mix. This solution 1mL containing 0.5mg silver. 3.7 Silver standard solution. Pipette 50.00mL standard silver stock solution (3.6) in a brown 500mL volumetric flask, 10mL of nitric acid was added (3.3), dilute to the mark and mix. This solution 1mL containing 50μg silver.

4 Instrument

Atomic absorption spectrometer, with a silver hollow-cathode lamp. Under optimum conditions the instrument, who can achieve the following indicators atomic absorption spectrometer can be used. Characteristic concentration. In line with the measuring solution matrix solution, features silver concentration should be less than 0.034μg/mL. Precision. standard solution measurement of high concentrations 10 times the absorbance, the standard deviation should not exceed the average absorbance of 1.0%; 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 of the standard level Absorbance was 0.5%. Linear curve. The curve is divided into five sections according to concentration, than the difference between the absorbance of the absorbance difference between the highest and the lowest segment segment should Not less than 0.8. ......

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