GB/T 5121.28-2021Methods for chemical analysis of copper and copper alloys—Part 28: Determination of chromium,iron,manganese,cobalt,nickel,zinc,arsenic,selenium,silver,cadmium,tin,antimony,tellurium,lead and bismuth content—Inductively coupled plasma-mass spectrometry (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

This document is part 28 of GB/T 5121 "Methods for Chemical Analysis of Copper and Copper Alloys". GB/T 5121 has issued the following part.

--- Part 1. Determination of copper content;

--- Part 2. Determination of phosphorus content;

--- Part 3. Determination of lead content;

--- Part 4. Determination of carbon and sulfur content;

--- Part 5. Determination of nickel content;

--- Part 6. Determination of bismuth content;

--- Part 7; Determination of arsenic content;

--- Part 8. Determination of oxygen content;

--- Part 9. Determination of iron content;

--- Part 10. Determination of tin content;

--- Part 11. Determination of zinc content;

--- Part 12. Determination of antimony content;

--- Part 13. Determination of aluminum content;

--- Part 14. Determination of manganese content;

--- Part 15. Determination of cobalt content;

--- Part 16. Determination of chromium content;

--- Part 17. Determination of beryllium content;

--- Part 18. Determination of magnesium content;

--- Part 19. Determination of silver content;

--- Part 20. Determination of zirconium content;

--- Part 21. Determination of titanium content;

--- Part 22. Determination of cadmium content;

--- Part 23. Determination of silicon content;

--- Part 24. Determination of selenium and tellurium content;

--- Part 25. Determination of boron content;

--- Part 26. Determination of mercury content;

--- Part 27. Inductively coupled plasma atomic emission spectrometry;

--- Part 28. Determination of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth content inductively coupled plasma daughter mass spectrometry;

--- Part 29. Determination of aluminum oxide content.

This document replaces GB/T 5121.28-2010 "Methods for chemical analysis of copper and copper alloys - Part 28. Chromium, iron, manganese, cobalt, nickel, zinc, Determination of arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth by inductively coupled plasma mass spectrometry, compared with GB/T 5121.28-2010, In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the sample weight of the samples. The sample weight of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, silver, cadmium, tin, antimony, lead and bismuth was changed from 0.50g to 0.10g, and the sample weight for the determination of selenium and tellurium content was changed from 1.00g to 0.10g (see 8.1, 6.1 of the 2010 edition);

b) The preparation method of the analytical test solution was changed, the initial addition amount of nitric acid was adjusted from 2mL to 5mL, and the addition amount of the indium standard solution was changed from 1mL was adjusted to 2mL (see 8.4, 6.4 of the 2010 edition);

c) Added the description of the determination mode of elements (see Table 1).

Introduction

Copper and copper alloys are widely used for their excellent electrical conductivity, thermal conductivity and corrosion resistance, as well as good mechanical properties and formability, electric power, electronics, transportation, ships, machinery, petrochemical and other fields. In order to meet the needs of the industry for R&D, production and testing of copper and copper alloys, It is very necessary to formulate a series of analytical method standards to form a unified test evaluation method in the industry and increase the reliability and reliability of test results. comparability. GB/T 5121 aims to establish a set of practical standards for chemical analysis methods of copper and copper alloys through experimental research. Consists of nine parts.

--- Part 1. Determination of copper content;

--- Part 2. Determination of phosphorus content;

--- Part 3. Determination of lead content;

--- Part 4. Determination of carbon and sulfur content;

--- Part 5. Determination of nickel content;

--- Part 6. Determination of bismuth content;

--- Part 7; Determination of arsenic content;

--- Part 8. Determination of oxygen content;

--- Part 9. Determination of iron content;

--- Part 10. Determination of tin content;

--- Part 11. Determination of zinc content;

--- Part 12. Determination of antimony content;

--- Part 13. Determination of aluminum content;

--- Part 14. Determination of manganese content;

--- Part 15. Determination of cobalt content;

--- Part 16. Determination of chromium content;

--- Part 17. Determination of beryllium content;

--- Part 18. Determination of magnesium content;

--- Part 19. Determination of silver content;

--- Part 20. Determination of zirconium content;

--- Part 21. Determination of titanium content;

--- Part 22. Determination of cadmium content;

--- Part 23. Determination of silicon content;

--- Part 24. Determination of selenium and tellurium content;

--- Part 25. Determination of boron content;

--- Part 26. Determination of mercury content;

--- Part 27. Inductively coupled plasma atomic emission spectrometry;

--- Part 28. Determination of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth content inductively coupled plasma daughter mass spectrometry;

--- Part 29. Determination of aluminum oxide content.

This document fully considers the current actual technical level of copper and copper alloy production, research and development, application and testing.

The analysis and testing method of chemical composition can improve the reliability and comparability of testing data of various institutions, and help the development of my country's copper and copper alloy industry. exhibition plays a very important role.

1 Scope

This document specifies a method for the determination of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth in copper and copper alloys.

This document applies to the determination of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth in copper and copper alloys. Measurement range: 0.00005%~0.0050%.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682 Analysis Laboratory Water Specifications and Test Methods

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Principles of the method

The sample was dissolved in nitric acid, and under the optimal operating conditions selected, indium was used as the internal standard element, and the inductively coupled plasma mass spectrometer was used.

The content of iron was determined by the collision/reaction cell mode, and the elements of chromium, manganese, cobalt, nickel, zinc, arsenic, silver, cadmium, tin, antimony, tellurium, lead and bismuth were determined by the standard mode.

The content of selenium element can be determined by collision/reaction cell mode or standard mode.

5 Reagents and Materials

Unless otherwise stated, only premium grade reagents were used.

5.1 Water, GB/T 6682, Class I.

5.2 Nitric acid (rho=1.42g/mL).

5.3 Hydrochloric acid (rho=1.19g/mL).

5.4 Nitric acid (1 99).

5.5 Nitric acid (1 1).

5.6 Hydrochloric acid (1 1).

5.7 Chromium standard storage solution. Weigh 3.7349g potassium chromate (wK2CrO4>=99.99%) (pre-baked at 105°C for 1h), put it in 150mL In the beaker, add 50mL of water to dissolve, add 4mL of hydrogen peroxide to reduce chromium, heat to boil, cool, transfer to a 1000mL volumetric flask, use […]