GB/T 20899.13-2017Methods for chemical analysis of gold ores-Part 13: Determination of lead,zinc,bismuth,cadminum,chromium,arsenic and mercury contents —Inductively coupled plasma atomic emission spectrometry (English PDF)

Foreword

GB/T 20899 "gold ore chemical analysis method" is divided into the following 14 parts.

--- Part 1. Determination of the amount of gold and silver;

--- Part 2. Determination of silver;

--- Part 3. Determination of arsenic;

--- Part 4. Determination of copper content;

--- Part 5. Determination of lead content;

--- Part 6. Determination of zinc content;

--- Part 7. Determination of iron content;

--- Part 8. Determination of sulfur;

--- Part 9. Determination of carbon content;

--- Part 10. Determination of the amount of antimony;

--- Part 11. Determination of arsenic and bismuth;

--- Part 12. Determination of arsenic, mercury, cadmium, lead and bismuth content; Atomic fluorescence spectrometry;

--- Part 13. Determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury; Inductively coupled plasma atomic emission spectrometry;

--- Part 14. Determination of thallium content Inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry.

This section GB/T 20899 Part 13.

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

1 Scope

This part of GB/T 20899 specifies the determination of the amount of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury in gold ores.

This section applies to the determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury in gold ores, the determination of the elements in Table 1.

2 Method principle

The sample is dissolved in hydrochloric acid, nitric acid (determination of lead, zinc, bismuth, cadmium, arsenic and mercury) or dissolved in phosphoric acid (determination of chromium) In the inductively coupled plasma atomic emission spectrometer selected conditions, the determination of the test solution of the spectral intensity of each element, with yttrium as the internal standard, press Standard curve method for calculating lead, zinc, bismuth, cadmium, chromium, arsenic and mercury.

3 Reagent

Unless otherwise specified, analytical reagents are used in the assay with either deionized or distilled water or rather pure water.

3.1 Nitric acid (p = 1.42 g/mL).

3.2 Hydrochloric acid (p = 1.19 g/mL).

3.3 Perchloric acid (rho = 1.76g/mL).

3.4 Sulfuric acid (p = 1.84 g/mL).

3.5 Phosphate (p = 1.87 g/mL).

3.6 Hydrofluoric acid (p = 1.14 g/mL).

3.7 Tartaric acid solution (200g/L).

3.8 Ammonium bifluoride solution (200 g/L).