Overview
ISO/TS 19807-1:2019 - "Nanotechnologies - Magnetic nanomaterials - Part 1: Specification of characteristics and measurements for magnetic nanosuspensions" is a technical specification from ISO that defines what characteristics of magnetic nanosuspensions should be measured and lists appropriate measurement methods. This generic document focuses on standard terminology, measurable properties and reporting principles for liquid dispersions of magnetic nanoparticles (magnetic nanosuspensions), without prescribing any specific application.
Key topics and technical requirements
The standard provides a structured framework for characterizing magnetic nanosuspensions, including:
- Terms and definitions for core concepts (e.g., nanoparticle, agglomerate, aggregate, core–shell particle, hydrodynamic diameter, nanoscale).
- Magnetic properties to be measured and reported: magnetization, magnetic moment, AC susceptibility, differential magnetic susceptibility, Curie temperature, pyromagnetic coefficient and parameters relevant to magnetic field hyperthermia.
- Physical and chemical characteristics: particle size and particle size distribution (core and hydrodynamic diameters), particle volume fraction, chemical composition, dry matter content and fluid density.
- Rheological and thermal properties: dynamic viscosity, magnetoviscosity, freezing point, pour point and related stability indicators.
- Functional/diagnostic parameters: relaxivity (NMR contrast-related parameter) and other properties relevant to medical imaging or therapy.
- Measurement methods and reporting: the document lists suitable measurement approaches and prescribes the information to report (measurement conditions, temperature, field strength, units and assumptions).
- Auxiliary information: Annex A describes the three components of a magnetic nanosuspension - magnetic nanoparticles, dispersing medium and dispersant.
Note: ISO/TS 19807-1:2019 lists characteristics and methods but remains generic - it does not mandate a single instrument or technique.
Applications and users
ISO/TS 19807-1:2019 is directly useful for organizations that develop, manufacture, test or regulate magnetic nanosuspensions, including:
- Research laboratories and R&D teams working on magnetic nanomaterials, medical imaging agents, drug-delivery nanoparticles and magnetic hyperthermia.
- Industrial producers of magnetic nanosuspensions for lubricants, coolants, seals, environmental remediation and specialty fluids.
- Quality-control and metrology laboratories that need standardized measurement protocols and reporting formats.
- Regulators, certification bodies and standardization groups assessing product data or safety submissions.
Using this standard helps ensure consistent characterization, reproducibility, and comparability of data across suppliers and studies.
Related standards
ISO/TS 19807-1 references and aligns with other nanotechnology and measurement standards, such as the ISO/TS 80004 series (nanotechnology terminology) and standards for viscosity, composition and magnetic measurements (e.g., ISO 3104, ISO 11358-1). For series context, see the ISO/TS 19807 family on the ISO website.
Keywords: ISO/TS 19807-1:2019, magnetic nanosuspensions, magnetic nanomaterials, nanotechnologies, measurement methods, particle size, magnetic susceptibility, relaxivity.