GB/T 43098.2-2023 (English Version)

Standard No.: GB/T 43098.2-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 43098.2-2023

Scope: This document describes the method for determining the content 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 determination range of each element is 0.001~μg/g~10~μg/g

Introduction

1. Background and significance of standard formulation

With the continuous development of water treatment technology, water treatment agents play an increasingly important role in industrial production and environmental protection. In order to ensure the quality and safety of water treatment agents, the GB/T 43098 "Analysis Methods for Water Treatment Agents" series of standards came into being, of which the second part is specifically for the determination of heavy metal elements such as arsenic, mercury, cadmium, chromium, lead, nickel, and copper.

This standard adopts the highly sensitive and precise inductively coupled plasma mass spectrometry (ICP-MS), which is suitable for quality control and environmental monitoring of a variety of water treatment agent products. By accurately determining the content of these heavy metal elements, their harm to the environment and human health can be effectively avoided.

2. Comparison of standard frameworks

Standard dimensions	GB/T 43098.1 (Determination of phosphorus content)	GB/T 43098.2 (Determination of heavy metal elements)	Scope of application
Detection method	Spectrophotometry or other analysis methods suitable for phosphorus	Inductively coupled plasma mass spectrometry (ICP-MS)	Determination requirements for specific elements in water treatment agents
Detection indicators	Phosphorus content	Arsenic, mercury, cadmium, chromium, lead, nickel, copper	Heavy metal pollution control
Sensitivity	Applicable to low and medium concentration ranges	High sensitivity, suitable for trace analysis	Monitoring of pollutants in complex water quality environments

3. Technical requirements and implementation suggestions

3.1 Key steps in sample preparation

Sample pretreatment is the key to ensuring detection accuracy. For water treatment agents containing organic matter, microwave digestion or hot plate digestion is recommended:

Weighing and dissolving:Accurately weigh the sample and add acid to dissolve it.
Digestion process:Select a suitable acid system (such as nitric acid, sulfuric acid, etc.) and digest it at high temperature until it becomes a transparent liquid.
Filtration and volume adjustment:After cooling, filter through a microporous membrane, transfer quantitatively and dilute to the scale.

3.2 Calibration curve establishment

The quality of the calibration curve directly affects the accuracy of the measurement results. It is recommended to follow the following steps:

Preparation of standard solution:Prepare low and high concentration series of standard solutions according to the actual concentration range of the element to be measured.
Instrument tuning:Use the mass spectrometer tuning solution to adjust the instrument sensitivity and resolution to ensure that the matrix effect is minimized.
Measurement and fitting:Inject the calibration solution for measurement, use the signal intensity or the ratio of the element to be measured to the internal standard as the ordinate, and the mass concentration as the abscissa, draw the calibration curve and calculate the regression equation (the correlation coefficient R should be no less than 0.999).

4. Safety Precautions

In actual operation, special attention should be paid to the following safety matters:

Gas management:Check the argon gas pipeline regularly to prevent leakage.
Handling of toxic and hazardous substances:After the experiment, perform safe pretreatment of waste in accordance with HG/T 5012 and entrust qualified units to dispose of it.
Ventilation system:Ensure that the laboratory is well ventilated, especially when using toxic reagents and high-temperature equipment.

5. Implementation Recommendations

In order to ensure the effective implementation of the standard, the following measures are recommended:

Instrument calibration:Calibrate and maintain the ICP-MS regularly to ensure that its performance meets the requirements.
Staff training:Strengthen the training of operators to improve sample preparation and data analysis capabilities.
Quality Control: Blank tests and spike recovery verification were added during the testing process to ensure the accuracy of the data.

GB/T 43098.2-2023 Referenced Document

GB/T 39486 Chemical reagent—General rules for inductively coupled plasma mass spectrometry
GB/T 602 Chemical reagent--Preparations of standard solutions for impurity
HG/T 5012 Standard guide for safe pretreatment of laboratory chemical waste

GB/T 43098.2-2023 history

2023 GB/T 43098.2-2023 Methods for analysis of water treatment agents Part 2: Determination of arsenic, mercury, cadmium, chromium, lead, nickel and copper content by inductively coupled plasma mass spectrometry (ICP-MS)

GB/T 43098.2-2023