ES390441A1 - Rapid electrometric ion activity determination - Google Patents

Rapid electrometric ion activity determination

Info

Publication number
ES390441A1
ES390441A1 ES390441A ES390441A ES390441A1 ES 390441 A1 ES390441 A1 ES 390441A1 ES 390441 A ES390441 A ES 390441A ES 390441 A ES390441 A ES 390441A ES 390441 A1 ES390441 A1 ES 390441A1
Authority
ES
Spain
Prior art keywords
circuit
point
indicating
nul
ion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES390441A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of ES390441A1 publication Critical patent/ES390441A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
    • H03F3/1855—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices with junction-FET devices

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The appts. determines pH-, p(Me)-, or p(L)- values of materials, using an ion-sensitive or ion-specific test element of low or extremely high internal resistance, an amplifier circuit, pref. transistorised, and an indicating device for indicating the measured values in analogue or digital form. - The test equipment consists of a known electrode measuring circuit, with a measuring and reference electrode and a single indicating isotherm point of intersection, constant electrical circuit nul-point and an internal buffer of high buffering capacity, and has a stable gradient and a storage vessel contg. a forming soln. - Fixed resistances R1 and R2 are arranged in the amplification circuit and adjusted for the asymmetry potential and electric appts. nul-point, the temp. factor of the measuring circuit and the amplification factor.
ES390441A 1970-04-24 1971-04-22 Rapid electrometric ion activity determination Expired ES390441A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH623570A CH520929A (en) 1970-04-24 1970-04-24 Method and device for the rapid electrometric determination of ion activities

Publications (1)

Publication Number Publication Date
ES390441A1 true ES390441A1 (en) 1974-04-01

Family

ID=4306384

Family Applications (1)

Application Number Title Priority Date Filing Date
ES390441A Expired ES390441A1 (en) 1970-04-24 1971-04-22 Rapid electrometric ion activity determination

Country Status (4)

Country Link
CH (1) CH520929A (en)
DE (1) DE2118876C3 (en)
ES (1) ES390441A1 (en)
ZA (1) ZA712626B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK155556C (en) * 1981-03-20 1989-10-09 Radiometer As THERMOSTATED ELECTRODE DEVICE

Also Published As

Publication number Publication date
DE2118876A1 (en) 1971-11-04
DE2118876B2 (en) 1978-12-07
ZA712626B (en) 1972-01-26
DE2118876C3 (en) 1979-08-09
CH520929A (en) 1972-03-31

Similar Documents

Publication Publication Date Title
CA936379A (en) Manometer with sliding adjustable scale and meniscus indicator
GB1432029A (en) Device for measuring neutron flux
DK128830B (en) Electrolyte seepage element for electrochemical measuring instruments and method for manufacturing such elements.
GB1058890A (en) Improvements in and relating to methods of measuring voltage
GB941645A (en) Improvements in or relating to flow measurement devices
ES390441A1 (en) Rapid electrometric ion activity determination
GB855658A (en) Improvements in and relating to the measurement of thermal conductivity
NO774389L (en) PROCEDURE AND DEVICE FOR ADJUSTING THE ELECTRODE DISTANCE IN AN ELECTROLYSIS CELL
IT959721B (en) RECORDING MEASURING DEVICE WITH MOVABLE WRITING ELECTRODE
AT320079B (en) Circuit arrangement for measuring the difference between two measured values occurring as electrical voltages and / or currents
IT1065612B (en) RESISTANCE MEASURING DEVICE ACCORDING TO THEIR HEATING WITH THE DETERMINATION OF THEIR HEATING CAPACITY AND THE LOSS COEFFICIENT OF APPROX.
GB995922A (en) A method of measuring resistivity and apparatus suitable for measuring resistivity
IE36009L (en) Apparatus for electrometric determination of ion activity
GB844217A (en) Improvements in or relating to apparatus for testing soil moisture
Jacobs Apparatus for the measurement of ionic conductance of solid salts
SU377680A1 (en) GLASS ELECTRODE
Young Ultrasensitive measurement of short distances
ES195000U (en) Device, in a lead accumulator element, for the determination of the density of the sulfuric acid electrolyte. (Machine-translation by Google Translate, not legally binding)
CH532243A (en) Equipment on surveying instruments for measuring the change in inclination of the tilt axis
GB1221704A (en) Method for testing the resistance characteristics of self-heated electric resistors
GB1204151A (en) Device for the accurate measurement of temperature
SU461454A1 (en) Analog storage device
SU127452A1 (en) Instrument for measuring and automatically recording radiation balance
FR2200966A5 (en) Oxygen detector, employs terbium oxide element - to check oxygen content of atmosphere in mines and submarines and in fermentation processes
DETINOV et al. Effect of variation in contact resistance on the readings of strain gages in strength tests(Contact resistance variation effect ion strength tests, noting strain gauge reading error magnitudes)