INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Introduced: September 1968

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Description

G01N encompasses methods and apparatus for determining chemical and physical properties of materials through various analytical techniques. This subclass covers a broad range of measurement and testing technologies, including spectroscopy, chromatography, thermal analysis, microscopy, and electrochemical analysis. Applications span materials characterization, quality control, environmental monitoring, clinical diagnostics, and industrial process control across diverse materials including solids, liquids, gases, and biological samples. Adjacent classes handle more specialized domains such as G01R (electrical/magnetic measurements) and G01M (mechanical property testing), while G01N focuses on compositional and structural analysis rather than dimensional or mechanical measurements.

Scope Notes

Glossary: investigating testing or determining material materials solid, or liquid or gaseous medium, e.g. the atmosphere sample samples material separated from a bulk material or an assembly of items for the purpose of investigating its properties | Limiting references: apparatus for enzymology or microbiology measuring or testing processes involving enzymes or microorganisms, other than immunoassay (which is covered by ) | Application references: measuring for medical or veterinary diagnosis on the human or animal body, e.g. measuring characteristics of blood in vivo, radiation diagnosis, or acoustic examination of body cavities or body tracts , investigation, e.g. sampling, of foundation soil or ground water in-situ monitoring or diagnostic devices for exhaust-gas treatment apparatus measuring, investigating or testing electric or magnetic properties of materials (see also IPC definition for subgroup ) determining sensitivity, graininess, or density of photographic materials testing component parts of nuclear reactors

Related Keywords

ANALYSING of substancesinvestigating dampnessmeasuring DAMPNESSdetecting FAULTS in materialdetecting FLAWS in materialsinvestigating properties of FLUID(S)analysing GAS(ES)investigating HUMIDITYINVESTIGATING materialsdetecting IRREGULARITIES in materialsinvestigating chemical or physical properties of MATERIALSinvestigating METAL(S)investigating MOISTURE contentinvestigating or analysing materials by determining their chemical or physical PROPERTIESinvestigating SMOKEinvestigating STEAMTESTING of eggsinvestigating TEXTUREinvestigating VISCOSITY; viscometersinvestigating VOIDS

22 direct subcodes

Child Classifications

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G01N 1/00 Sampling; Preparing specimens for investigation
G01N 11/00 Investigating flow properties of materials, e.g. viscosity or plasticity; Analysing materials by determining flow properties
G01N 13/00 Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
G01N 15/00 Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
G01N 17/00 Investigating resistance of materials to the weather, to corrosion or to light
G01N 19/00 Investigating materials by mechanical methods
G01N 21/00 Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
G01N 22/00 Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
G01N 23/00 Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or
G01N 24/00 Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
G01N 25/00 Investigating or analysing materials by the use of thermal means
G01N 27/00 Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N 29/00 Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N 3/00 Investigating strength properties of solid materials by application of mechanical stress
G01N 30/00 Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography
G01N 31/00 Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods
G01N 33/00 Investigating or analysing materials by specific methods not covered by groups
G01N 35/00 Automatic analysis not limited to methods or materials provided for in any single one of groups; Handling materials therefor
G01N 37/00 Details not covered by any other group of this subclass
G01N 5/00 Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid