GB1381966A - Methods of automatic titration and apparatus for carrying out such methods - Google Patents

Methods of automatic titration and apparatus for carrying out such methods

Info

Publication number
GB1381966A
GB1381966A GB3850472A GB3850472A GB1381966A GB 1381966 A GB1381966 A GB 1381966A GB 3850472 A GB3850472 A GB 3850472A GB 3850472 A GB3850472 A GB 3850472A GB 1381966 A GB1381966 A GB 1381966A
Authority
GB
United Kingdom
Prior art keywords
value
text
tint
signal
timers
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
GB3850472A
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.)
Mettler Instrumente AG
Original Assignee
Mettler Instrumente AG
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 Mettler Instrumente AG filed Critical Mettler Instrumente AG
Publication of GB1381966A publication Critical patent/GB1381966A/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
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/11—Automated chemical analysis
    • Y10T436/115831—Condition or time responsive
    • Y10T436/116664—Condition or time responsive with automated titrator

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

1381966 Automatic titration METTLER INSTRUMENTE AG 17 Aug 1972 [1 Feb 1972] 38504/72 Heading G1N In an automatic titration apparatus in which the titrating agent is supplied in a series of individual amounts to the specimen to be tested a respective next individual amount of titrating agent is supplied only when the differentiated output from the sensor measuring a titrating parameter falls below a predetermined value and preferably remains below the value for a predetermined time. A titration vessel containing bivalent iron to be tested is provided with Pt/Ag AgCl measuring electrodes and the permanganate titrating agent is added in 0À1 ml quantities from a burette controlled by a driver including a stepping motor and a variable frequency pulse transmitter. The delivery speed is set at remote control 17 by controlling the frequency of the pulse transmitter and then the apparatus is started. The potential as measured by electrodes 11 is amplified and differentiated with respect to time in amplifier 14, and then passed through an analog amplifier 28, the sensitivity of which can be set, to a threshold switch 29. As shown in Fig. 6 when the differentiated value of the protential E<SP>1</SP> falls to the point corresponding to a threshold -G of the switch 29 timers 30 are set in operation. The timers delay is composed of one time interval tint which depends upon the maximum valve M1 reached by E<SP>1</SP> and another time interval text which is set depending upon the required sensitivity of the apparatus. After this interval of tint + text then if E<SP>1</SP> still lies in the region between +G and -G of the threshold switch a signal is passed to data transfer 31 which causes the potential supplied by amplifier 14 to be indicated on a digital indicator and recorded on a chart, and an analog digital reset 32 to be triggered. The reset 32 passes a signal to an increment pulse counter 33 which passes a starting signal to the burette driver 13 to cause a further volume of titrant to be applied. If however the value of E<SP>1</SP> passes outside the threshold region before the time interval tint + text has passed both timers 30 are reset and the delay begun again, and no signal is applied to the data transfer 36. The process is repeated until the value of E<SP>1</SP> lies between -G and +G at the end of the delay tint + text. The titration process may be conductometric, voltametric, amperometric, photo-metric or thermometric. The titrating agent may be generated electrolytically.
GB3850472A 1972-02-01 1972-08-17 Methods of automatic titration and apparatus for carrying out such methods Expired GB1381966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH147272A CH534877A (en) 1972-02-01 1972-02-01 Process for automatic titration and device for carrying out the process

Publications (1)

Publication Number Publication Date
GB1381966A true GB1381966A (en) 1975-01-29

Family

ID=4211269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3850472A Expired GB1381966A (en) 1972-02-01 1972-08-17 Methods of automatic titration and apparatus for carrying out such methods

Country Status (7)

Country Link
US (1) US3870466A (en)
JP (1) JPS5424676B2 (en)
CH (1) CH534877A (en)
DE (1) DE2300793C2 (en)
FR (1) FR2163190A5 (en)
GB (1) GB1381966A (en)
SE (1) SE388046B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028319A1 (en) * 1979-11-02 1981-05-13 Phillips Petroleum Company Method and apparatus for effecting a repeated chemical analysis of a process stream

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50126292U (en) * 1974-03-30 1975-10-16
HU174711B (en) * 1976-04-20 1980-03-28 Egyt Gyogyszervegyeszeti Gyar Process and equipment for the analysis of liquid samples
DE2650572C2 (en) * 1976-11-04 1978-09-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method for monitoring the quantity of a wetting agent in an electrolyte for the surface treatment of metals
US4095272A (en) * 1977-01-11 1978-06-13 Phillips Petroleum Company Automatic turbidimetric titration
JPS5913699B2 (en) * 1977-01-12 1984-03-31 三井金属鉱業株式会社 Measuring device for iron ion concentration dissolved in zinc solution
JPS5489687A (en) * 1977-12-27 1979-07-16 Mitsubishi Chem Ind Titration controlling method
US4180440A (en) * 1978-05-15 1979-12-25 Fisher Scientific Company Variable endpoint analyzer
JPS5910845A (en) * 1982-07-09 1984-01-20 Sanwa Shoji Kk Determination of sulfurous acid in liquid and its device
US5104527A (en) * 1988-03-24 1992-04-14 Ashland Oil, Inc. Automatic total reducers monitoring and adjustment system using titration
US5246863A (en) * 1988-08-29 1993-09-21 Harald Dahms Karl Fischer titration techniques
JPH02107070U (en) * 1988-12-30 1990-08-24
US5518933A (en) * 1989-03-10 1996-05-21 Unitika Ltd. Method of analyzing washings for free acids and ions
US5291418A (en) * 1991-07-05 1994-03-01 Eastman Kodak Company Adjustment of electric potential by automatic titration
DE59308722D1 (en) * 1993-04-07 1998-08-06 Metrohm Ges Mit Beschraenkter Combined titration device
IT1293728B1 (en) * 1997-07-18 1999-03-10 Eniricerche S P A Ora Enitecno METHOD FOR DETERMINING THE FLOCCULATION THRESHOLD OF ASPHALTENES IN OIL
US6372505B1 (en) * 1998-11-03 2002-04-16 Mehler-Toledo Gmbh Process and apparatus for titrating
US6793387B1 (en) 1999-05-08 2004-09-21 Chata Biosystems, Inc. Apparatus for automatic preparation of a mixture and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740694A (en) * 1952-11-07 1956-04-03 Harold A Frediani Method and apparatus for control of titrations and other phenomena
US2834654A (en) * 1954-02-01 1958-05-13 Murayama Makio Method and apparatus for automatic amperometric titration
CH363508A (en) * 1957-10-09 1962-07-31 Geigy Ag J R Device for automatic titration
US3305468A (en) * 1962-12-12 1967-02-21 Velsicol Chemical Corp Automatic titration apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028319A1 (en) * 1979-11-02 1981-05-13 Phillips Petroleum Company Method and apparatus for effecting a repeated chemical analysis of a process stream

Also Published As

Publication number Publication date
SE388046B (en) 1976-09-20
JPS5424676B2 (en) 1979-08-22
US3870466A (en) 1975-03-11
DE2300793C2 (en) 1984-03-15
DE2300793A1 (en) 1973-08-09
JPS4885193A (en) 1973-11-12
CH534877A (en) 1973-03-15
FR2163190A5 (en) 1973-07-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee