GB/T 42732-2023 Active National standards

GB/T 42732-2023 Nanotechnologies—Size distribution and concentration measurement of inorganic nanoparticles in aqueous media—Single particle inductively coupled plasma mass spectrometry

Publish Date: 2023-08-06 Implement Date: 2024-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 42732-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Synthetic materials

ICS Name: -

Publish Date: 2023-08-06

Implement Date: 2024-03-01

Pages: 21 pages

Scope

This document describes the use of inductively coupled plasma mass spectrometry (ICPMS) in time-resolved mode to determine the mass of individual nanoparticles and the ion concentration in suspensions, detect nanoparticles in aqueous suspensions, and characterize the number and mass concentration of particles, as well as their size and number-average size distribution. This document is applicable to the size determination of inorganic nanoparticles in aqueous suspensions, such as metals and metal oxides (e.g., gold (Au), silver (Ag), titanium dioxide (TiO2), bismuth vanadate (BiVO4)). It is also suitable for the size determination of metal compounds (e.g., sulfides) with known oxide compositions and densities, metal composites, or coated particles with metal cores. The size range of nanoparticles in aqueous suspensions measured by this document is 10 nm to 100 nm (with larger particles up to 1,000 nm to 2,000 nm), and the concentration range of particles is 106 particles/L to 109 particles/L, corresponding to a mass concentration range (for 60 nm gold nanoparticles) of approximately 1 ng/L to 1,000 ng/L. The actual measurement depends on the type of mass spectrometer used and the type of nanoparticles analyzed. In addition to particle concentration, this document is also applicable to the determination of ion concentration in suspensions. The detection limit for ions is comparable to that of conventional ICPMS. It should be noted that nanoparticles smaller than the detection limit of single-particle inductively coupled plasma mass spectrometry (spICPMS) may be quantified as ions. This document is not suitable for the detection and characterization of organic or carbon-based nanoparticles, such as encapsulated materials, fullerenes, and carbon nanotubes (CNTs), nor for elements other than carbon that are difficult to measure by ICPMS. Reference [12] outlines the elements that can be detected by spICPMS and the minimum particle size for measurement.