YS/T 3015.2-2013Methods for chemical analysis of gold-loaded carbon. Part 2: Determination of copper and iron contents. Flame atomic absorption spectrometry (English PDF)

Foreword

YS/T 3015 "loaded carbon chemical analysis methods" is divided into four parts.

--- Part 1. Determination of moisture content of the dry weight method;

--- Part 2. Determination of copper and iron content by flame atomic absorption spectrometry;

--- Part 3. Determination of the amount of calcium and magnesium by flame atomic absorption spectrometry;

--- Part 4. Copper, iron, calcium and magnesium content - Inductively coupled plasma atomic emission spectrometry.

This section YS/T 3015 Part 2.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This part is proposed by the China Gold Association.

This part of the National Gold Standardization Technical Committee (SAC/TC379) centralized.

This section is drafted. Zijin Mining Group Co., Lingbao Gold Company Ltd., Changchun Gold Research Institute, Henan Zhongyuan Gold Smelter Co., Ltd., Shandong National Gold Corp., Tongguan gold smelting limited liability company.

1 Scope

This section YS/T 3015 specifies the method for determination of loaded carbon in copper and iron content.

This section applies to the determination of gold contained in the carbon content of copper and iron. Measurement range. 0.010% to 2.00% copper; iron ~ 0.010% 1.00%.

2 Method summary

The sample was burning ashed with hydrochloric acid, nitric acid to dissolve the residue. In dilute hydrochloric acid medium, flame atomic absorption spectrometer wavelength 324.8nm and 248.3nm at using air - acetylene flame, copper and iron were measured absorbance, calculated according to the standard curve and copper 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 (rho = 1.19g/mL).

3.2 hydrochloride (11).

3.3 hydrochloride (14).

3.4 nitric acid (rho = 1.42g/mL).

3.5 copper standard stock solution. Weigh 1.0000g copper (mass fraction >=99.99%) in 250mL beaker, add 10mL water, Along Beibi added 10mL of nitric acid (3.4), cover the surface of the pan, over low heat until completely dissolved, boil expelled nitrogen oxides, remove the cooled to room temperature. Moved into 1000mL volumetric flask, dilute with water to volume, and mix. 1mL solution containing 1mg of copper.

3.6 Copper Standard Solution. Pipette 25.00mL copper standard stock solution (3.5) in 250mL volumetric flask, was added 25mL of hydrochloric acid (3.3), Dilute with water to volume, and mix. This solution 1mL containing 100µg copper.

3.7 iron standard stock solution. Weigh 1.4297g ferric oxide (excellent pure) in 250mL beaker, add 50mL of hydrochloric acid (3.2), Cover with a watch glass, low heat until completely dissolved, remove the cooling to room temperature. Moved into 1000mL volumetric flask, dilute with water to volume, and mix.

1mL solution containing 1mg iron.

3.8 iron standard solution. Pipette 25.00mL iron standard stock solution (3.7) in 250mL flask, add 25mL of hydrochloric acid (3.3), Dilute with water to volume, and mix. This solution 1mL containing 100µg iron.

4 Instrument

Atomic absorption spectrometer, with iron and copper hollow cathode lamp hollow cathode lamp.

Under optimum working conditions for those who can reach the following indicators can be used.

--- Characteristic concentration. a solution in the measurement matrix consistent solution features copper concentration should be less than 0.037µg/mL, iron