GB/T 42513.5-2023Methods for chemical analysis of nickel alloys - Part 5: Determination of vanadium content - Nitrous oxide- flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting:

This document is Part 5 of GB/T 42513 "Chemical Analysis Methods for Nickel Alloys": GB/T 42513 has released the following parts:

---Part 1: Determination of chromium content by ferrous ammonium sulfate potentiometric titration method;

---Part 2: Determination of phosphorus content by molybdenum blue spectrophotometry;

---Part 3: Determination of aluminum content by nitrous oxide-flame atomic absorption spectrometry and inductively coupled plasma atomic emission light spectrometry;

---Part 4: Determination of silicon content by nitrous oxide-flame atomic absorption spectrometry and molybdenum blue spectrophotometry;

---Part 5: Determination of vanadium content by nitrous oxide-flame atomic absorption spectrometry and inductively coupled plasma atomic emission light spectrum method:

This document is modified to adopt ISO 7530-9:1993 "Nickel alloy flame atomic absorption spectrometry Part 9: Determination of vanadium content":

Compared with ISO 7530-9:1993, this document has many adjustments in structure: A comparison list of structure numbers between the two documents is attached:

Record A:

Compared with ISO 7530-9:1993, there are many technical differences between this document and the clauses involved in the outer margins:

Straight single lines (|) are marked: A list of these technical differences and their causes is provided in Appendix B:

The following editorial changes have been made to this document:

---In order to coordinate with the existing standards, the name of the standard is changed to "Chemical Analysis Methods for Nickel Alloys Part 5: Determination of Vanadium Content-Oxygen Nitrogen-flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry";

--- Add Notes 1 to 5 regarding sample dissolution in 4:5:4 Sample processing:

Please note that some contents of this document may involve patents, and the issuing organization of this document does not assume the responsibility for identifying patents:

Introduction

Nickel alloys are commonly used in instrumentation, electronic communications, pressure vessels, corrosion-resistant devices, and are widely used in aerospace and high-end special purposes:

Machinery and equipment manufacturing and other industries are one of the important metal raw materials for industrial development: International standards for chemical analysis methods of nickel alloys have been published for dozens of in:2017, with the progress of my country's industry, the demand for the production, import and export of high-end nickel alloy materials increased: To this end, international standards were transformed into national standards:

It is of great significance to assist the development and upgrading of non-ferrous industry and the development of domestic manufacturing industry: GB/T 42513 "Chemical Analysis Methods for Nickel Alloys" Purpose in establishing a complete and practical standard method for testing chromium, phosphorus, niobium, molybdenum, aluminum, vanadium, silicon, cobalt, copper and other elements in nickel alloys, transform it into the following international standards:

---ISO 7592:2017 Determination of chromium content in nickel alloys by ferrous ammonium sulfate potentiometric titration method;

---ISO 9388:1992 Determination of phosphorus content in nickel alloys by molybdenum blue spectrophotometry;

---ISO 7530-7:1992 Flame atomic absorption spectrometry of nickel alloys Part 7: Determination of aluminum content;

---ISO 7530-8:1992 Flame atomic absorption spectrometry of nickel alloys Part 8: Determination of silicon content;

---ISO 7530-9:1993 Flame atomic absorption spectrometry of nickel alloys Part 9: Determination of vanadium content;

---ISO 11435:2011 Determination of molybdenum content in nickel alloys by inductively coupled plasma atomic emission spectrometry;

---ISO 7530-1:2015 Flame atomic absorption spectrometry analysis of nickel alloys Part 1: Cobalt, chromium, copper, iron and manganese content determination;

---ISO 22033:2011 Determination of niobium content in nickel alloys by inductively coupled plasma atomic emission spectrometry;

---ISO 11436:1993 Determination of total boron content in nickel and nickel alloys by curcumin absorption spectrometry;

---ISO 23166:2018 Determination of tantalum content in nickel alloys by inductively coupled plasma atomic emission spectrometry:

GB/T 42513 is planned to consist of 13 parts:

---Part 1: Determination of chromium content by ferrous ammonium sulfate potentiometric titration method:

---Part 2: Determination of phosphorus content by molybdenum blue spectrophotometry:

---Part 3: Determination of aluminum content by nitrous oxide-flame atomic absorption spectrometry and inductively coupled plasma atomic emission light spectrum method:

---Part 4: Determination of silicon content by nitrous oxide-flame atomic absorption spectrometry and molybdenum blue spectrophotometry:

---Part 5: Determination of vanadium content by nitrous oxide-flame atomic absorption spectrometry and inductively coupled plasma atomic emission light spectrum method:

---Part 6: Determination of molybdenum content by inductively coupled plasma atomic emission spectrometry:

---Part 7: Determination of cobalt, chromium, copper, iron and manganese content by flame atomic absorption spectrometry:

---Part 8: Determination of niobium content by inductively coupled plasma atomic emission spectrometry:

---Part 9: Determination of total boron content of curcumin spectrophotometrically:

---Part 10: Determination of trace element content by glow discharge mass spectrometry:

---Part 11: Determination of silicon, manganese, phosphorus, chromium, nickel, copper, molybdenum, cobalt, iron, aluminum, vanadium, titanium, tungsten and niobium content by X-ray fluorescence spectrometry (common law):

---Part 12: Determination of tantalum content by inductively coupled plasma atomic emission spectrometry:

---Part 13: Determination of oxygen, nitrogen and hydrogen content: Inert gas melting - thermal conductivity method/infrared absorption method:

Vanadium is added to nickel alloys to form an intermediate compound strengthening phase with nickel: Its material properties, especially high temperature mechanical properties, corrosion resistance and certain Some physical properties will be further improved: This document can promote the progress of nickel alloy testing technology in my country and ensure that industry practitioners can There are standards to follow in the process of production, application, scientific research and testing, filling the gap in the determination method of vanadium content in nickel alloys in my country:

Nickel alloy chemical analysis method Part 5: Determination of vanadium content Nitrous oxide-flame atomic absorption spectrometry and Inductively coupled plasma atomic emission spectrometry Warning---Personnel using this document should have regular laboratory work experience: This document does not address all possible security issues question: Users are responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations:

1 Scope

This document describes the determination of nickel alloys by nitrous oxide-flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry:

vanadium content in the method:

This document applies to the determination of vanadium content in nickel alloys, Method 1: Determination range of nitrous oxide-flame atomic absorption spectrometry (mass Fraction) is 0.05%~1%; Method 2: The measurement range (mass fraction) of inductively coupled plasma atomic emission spectrometry is 0:0020%~ 1.00%:

2 Normative reference documents

This document has no normative references:

3 Terms and definitions

There are no terms or definitions to be defined in this document:

4 Method 1: Nitrous oxide-flame atomic absorption spectrometry

4.1 Principle

The sample is dissolved in acid: In the nitric acid-hydrochloric acid mixed acid medium, add an ionization inhibitor (if necessary), and absorb the test solution into atoms in the nitrous oxide-acetylene flame of the absorption spectrometer, use the nitrous oxide-acetylene flame at the wavelength of 318:4 nm of the atomic absorption spectrometer:

Flame, measure the absorbance of vanadium, and calculate the vanadium content using the working curve method:

4.2 Reagents

Warning---Mixed acids (4:2:3) are unstable and highly corrosive: It will release toxic gas (chlorine) when left standing: It should be prepared in it should be carried out in a fume hood and should not be stored in a closed container:

Hydrofluoric acid (4:2:4) is extremely irritating and corrosive to skin and mucous membranes, causing severe skin burns and slow healing: such as contact on skin, please rinse with water and seek medical advice:

Unless otherwise stated, only approved analytical grade reagents and distilled water or water of equivalent purity are used during analysis:

4.2.1 Nitric acid: rho=1:41g/mL:

4.2.2 Hydrochloric acid: rho=1:18g/mL:

4.2.3 Nitric acid-hydrochloric acid mixed acid: Carefully mix 25mL nitric acid (4:2:1) and 75mL hydrochloric acid (4:2:2): The mixed solution is unstable: