GB/T 6150.9-2009Methods for chemical analysis of tungsten concentrates - Determination of copper content - Flame atomic absorption spectrometry (English PDF)

Foreword

GB/T 6150 "Methods for chemical analysis of tungsten concentrates" is divided into 17 parts.

Determination of GB/T 6150.1 Methods for chemical analysis of tungsten concentrates of tungsten trioxide amount of ammonium tungstate burning gravimetric method

GB/T 6150.2 Methods for chemical analysis of tungsten concentrates - Determination of tin content of potassium iodate volumetric method and hydride generation atomic absorption spectrometry

GB/T 6150.3 Methods for chemical analysis of tungsten concentrates - Determination of phosphorus content of phosphorus molybdenum yellow spectrophotometry Determination of GB/T 6150.4 Methods for chemical analysis of tungsten concentrates sulfur content of high frequency infrared absorption method Determination of EDTA volumetric method and atomic GB/T 6150.5 Methods for chemical analysis of tungsten concentrates calcium absorption spectrometry

GB/T 6150.6 Methods for chemical analysis of tungsten concentrates - Determination of hygroscopic water gravimetric method

GB/T 6150.7 Methods for chemical analysis of tungsten concentrates - Determination of the amount of tantalum and niobium plasma emission spectroscopy and spectrophotometry

GB/T 6150.8 Methods for chemical analysis of tungsten concentrates - Determination of molybdenum content - Thiocyanate spectrophotometric

GB/T 6150.9 Methods for chemical analysis of tungsten concentrates - Determination of copper content - Flame atomic absorption spectrometry

GB/T 6150.10 Methods for chemical analysis of tungsten concentrates - Determination of lead content by flame atomic absorption spectrometry

GB/T 6150.11 Methods for chemical analysis of tungsten concentrates of zinc content - Flame Atomic Absorption Spectrometry

GB/T 6150.12 Methods for chemical analysis of tungsten concentrates - Determination of silicon dioxide content and weight of molybdenum blue spectrophotometric method Hydride atomic GB/T 6150.13 Methods for chemical analysis of tungsten concentrates the amount of arsenic absorption spectroscopy and spectroscopic DDTC-Ag Spectrophotometry

GB/T 6150.14 Methods for chemical analysis of tungsten concentrates - Determination of manganese content of ammonium ferrous sulfate volumetric method and flame atomic absorption spectrometry

GB/T 6150.15 Methods for chemical analysis of tungsten concentrates bismuth content - Flame Atomic Absorption Spectrometry

GB/T 6150.16 Methods for chemical analysis of tungsten concentrates - Determination of iron content sulfonic acid spectrophotometry Hydride atomic GB/T 6150.17 Methods for chemical analysis of tungsten concentrates antimony content absorption spectrometry This section Part 9 GB/T 6150's.

This Part replaces GB/T 6150.11-1985 "chemical analysis of tungsten concentrates - The atomic absorption spectrophotometric determination of copper content." Section compared with the GB/T 6150.11-1985 The main changes are as follows.

--- Assay medium with hydrochloric acid to nitric acid;

--- Expanded measurement range from 0.005 percent to 0.500 percent to 0.005% to 1.00%;

--- Standard solution by adding hydrochloric acid, perchloric acid was added to a solution of nitric acid;

--- Increased repeatability terms.

1 Scope

GB/T 6150 This section provides the determination of copper content of tungsten concentrates.

This section applies to the determination of copper content of tungsten concentrates. Measurement range. 0.005% to 1.00%.

2 Method summary

Sample in a boiling water bath to decompose hydrochloric acid, nitric acid, perchloric acid is heated to dissolve the thick white smoke to take, remove cooling, nitric acid, the nitrate Acid medium, atomic absorption spectrometer at a wavelength of 324.8nm, air - acetylene flame measured the absorbance of copper, calculated using the working curve method Copper quality scores. Tungsten concentrate of impurities did not interfere.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or relative purity of water.

3.1 hydrochloride (rho1.19g/mL).

3.2 Nitrate (rho1.42g/mL).

3.3 Perchloric acid (rho1.67g/mL).

3.4 nitric acid (1 + 1).

3.5 copper standard stock solution. Weigh 0.2000g pure copper [Cu>=99.99%] in 300mL beaker, add 100mL nitric acid (3.4), dissolved by heating, cooling and 1000mL flask in constant volume, mix, and this solution 1mL containing 200µg copper.

4 Instrument

Atomic absorption spectrometer, with copper hollow cathode lamp.

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

--- Characteristic concentration. In line with the measuring solution matrix solution features copper concentration should be less than 0.059µg/mL.

--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed 1.5% 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 The average concentration of 0.5% absorbance.

--- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment Ratio should not be less than 0.7.

5 Sample

5.1 Sample size of less than 0.074mm.

5.2 sample was pretreated at 105 °C ~ 110 °C drying 2h, placed in a desiccator to cool to room temperature.

6 Analysis