GB/T 43098.2-2023Analysis of water treatment chemicals—Part 2: Determination of arsenic, mercury, cadmium, chromium, lead, nickel and copper—Inductively coupled plasma mass spectrometry(ICP-MS) (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 2 of GB/T 43098 "Analysis Methods for Water Treatment Agents". GB/T 43098 has released the following parts.

---Part 1. Determination of phosphorus content;

---Part 2. Determination of arsenic, mercury, cadmium, chromium, lead, nickel and copper content by inductively coupled plasma mass spectrometry (ICP-MS).

Introduction

In order to ensure the normal operation of the water system, save water, and reduce environmental pollution, it is necessary to add an appropriate amount of chemical treatment chemicals to the water.

Agents to control corrosion, scaling, bacteria, algae, slime and other hazards in production facilities. With the development of water treatment technology, water quality conditions are becoming increasingly complex, and different configurations The types of water treatment agent products composed of formulas are constantly increasing, and it is necessary to measure and monitor multiple indicators in water treatment agents.

GB/T 43098 aims to establish chemical analysis methods for water treatment agent products and is intended to consist of two parts.

---Part 1. Determination of phosphorus content. The purpose is to establish a method for determining phosphorus content.

---Part 2. Determination of arsenic, mercury, cadmium, chromium, lead, nickel and copper content by inductively coupled plasma mass spectrometry (ICP-MS). The purpose is To establish the determination method of arsenic, mercury, cadmium, chromium, lead, nickel and copper content.

Inductively coupled plasma mass spectrometry (ICP-MS) has the advantages of high sensitivity, good precision, and high detection efficiency. It is often used for single-dose or multiplex detection.

Determination of the content of various harmful metal elements in water treatment agent products.

Water treatment agent analysis method Part 2. Determination of arsenic, mercury, cadmium, chromium, lead, nickel and copper content Inductively coupled plasma mass spectrometry (ICP-MS)

Warning: Some reagents used in this document are toxic or corrosive. Avoid inhalation or skin contact when using. This document does not indicate the If there are possible safety issues, the user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations.

1 Scope

This document describes a method for the determination of arsenic, mercury, cadmium, chromium, lead, nickel, and copper in water treatment agents by inductively coupled plasma mass spectrometry.

This document is applicable to the determination of arsenic, mercury, cadmium, chromium, lead, nickel, and copper in water treatment agents. The content determination range of each element is 0.001µg/g~ 10µg/g.

2 Normative reference documents

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

GB/T 602 Preparation of standard solutions for determination of impurities in chemical reagents

GB/T 6041 General principles for mass spectrometry analysis methods

GB/T 33087-2016 Specifications and test methods of high-purity water for instrumental analysis

GB/T 39486 General principles for inductively coupled plasma mass spectrometry analysis of chemical reagents

HG/T 5012 Guidelines for safe pretreatment of laboratory waste chemicals

3 Terms and definitions

The terms and definitions defined in GB/T 6041 and GB/T 39486 apply to this document.

4 Method summary

After the sample is digested with acid and processed into a solution, it is entered into a high-temperature radio frequency plasma with argon gas as a matrix through a pneumatic atomizer in the form of aerosol.

, after evaporation, dissociation, atomization and ionization, it is converted into positively charged positive ions and then enters the mass spectrometer. According to the mass of the ions Charge ratio (mass-to-charge ratio) separates. Within a certain range, the mass spectrum response value of the element to be measured is proportional to its content in the sample, thus Each element was analyzed quantitatively.

5 Reagents or materials

5.1 The reagents and water used in this document, unless otherwise specified, only use high-grade pure and above reagents and comply with the regulations of GB/T 33087-2016 High purity water is used for instrumental analysis.

5.2 The standard solution used for impurity determination in the test shall be prepared in accordance with the provisions of GB/T 602 or a commercially available standard solution shall be used unless other requirements are specified. Quasi solution.