(0)G01N:6/9:

(0)G01N:6/9:

IPC6

SECTION G - PHYSICS

INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR...

G01N

7/10

G01N027/00 - G01N027/92

27

/

00

Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (G 01 N 3/00 to G 01 N 25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G 01 R)

by investigating impedance

by investigating resistance

of a liquid (involving electrolysis G 01 N 27/26; involving polarography G 01 N 27/48; measuring electric resistance of fluids G 01 R 27/22)

Construction of measuring vessels; Electrodes therefor [2]

which is flowing continuously

Investigation or analysis specially adapted for controlling or monitoring operations or for signalling (regulating G 05 D)

of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid

of an electrically-heated body in dependence upon change of temperature

caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas

caused by changes in the thermal conductivity of a surrounding material to be tested (G 01 N 27/20 takes precedence)

Investigating the presence of flaws

by investigating capacitance

Investigating the presence of flaws

by investigating electrochemical variables; by using electrolysis or electrophoresis (investigating resistance to corrosion G 01 N 17/00; investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography, G 01 N 30/00; immunoelectrophoresis G 01 N 33/561; electrochemical processes or apparatus in general B 01 J; standard cells H 01 M 6/28) [5]

Association of two or more measuring systems or cells, each measuring a different parameter, where the measurement results may be either used independently, the systems or cells being physically associated, or combined to produce a value for a further parameter [5]

Electrolytic cell components

Electrodes, e.g. test electrodes; Half-cells (G 01 N 27/414 takes precedence) [5]

Half-cells with permeable membranes, e.g. semi-porous or perm-selective membranes [5]

Calomel electrodes

Biochemical electrodes [5]

Ion-selective electrodes or membranes (glass electrodes G 01 N 27/36) [5]

Dropping-mercury electrodes

Glass electrodes

Cleaning of electrodes

Semi-permeable membranes or partitions

Salt-bridge leaks; Liquid junctions [5]

Cells and electrode assemblies [5]

Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid [5]

Cells and probes with solid electrolytes [5]

for investigating or analysing gases [5]

Oxygen concentration cells [5]

Oxygen pumping cells [5]

for investigating or analysing of liquid metals [5]

Concentration cells using liquid electrolytes [5]

Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS [5]

Systems (G 01 N 27/27 takes precedence) [5]

using cells and probes with solid electrolytes [5]

Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells [5]

Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte [5]

using electrolysis to generate a reagent, e.g. for titration [5]

using electrophoresis [5]

Cells therefor [5]

using polarography, i.e. measuring changes in current under a slowly-varying voltage

Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species [5]

by investigating electrostatic variables (by investigating capacitance G 01 N 27/22)

Investigating the presence of flaws [3]

by investigating the ionisation of gases; by investigating electric discharges, e.g. emission of cathode (particle spectrometers H 01 J 49/00)

using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber

and measuring current or voltage

using electric discharge to ionise a gas

and measuring current or voltage

by investigating magnetic variables

of fluids ( G 01 N 24/00 takes precedence)

by investigating susceptibility

for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material

for investigating the presence of flaws

by investigating stray magnetic fields [3]

by applying magnetic powder or magnetic ink [3]

using magnetographic methods [3]

using probes [3]

using eddy currents [3]

by investigating breakdown voltage (G 01 N 27/60, G 01 N 27/62 take precedence; testing of articles or specimens of solids or fluids for dielectric strength or breakdown voltage G 01 R 31/12) [3]

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