FR2417099A1 - METHOD FOR THE PRECISE ANALYSIS OF SAMPLES IN FLAME ABSORPTION AND EMISSION PHOTOMETERS, USING A FEEDBACK ELECTRICAL CONTROL LOOP TO COMPENSATE FOR AN ENERGY SLIP - Google Patents

METHOD FOR THE PRECISE ANALYSIS OF SAMPLES IN FLAME ABSORPTION AND EMISSION PHOTOMETERS, USING A FEEDBACK ELECTRICAL CONTROL LOOP TO COMPENSATE FOR AN ENERGY SLIP

Info

Publication number
FR2417099A1
FR2417099A1 FR7903627A FR7903627A FR2417099A1 FR 2417099 A1 FR2417099 A1 FR 2417099A1 FR 7903627 A FR7903627 A FR 7903627A FR 7903627 A FR7903627 A FR 7903627A FR 2417099 A1 FR2417099 A1 FR 2417099A1
Authority
FR
France
Prior art keywords
control loop
photometers
compensate
emission
samples
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.)
Withdrawn
Application number
FR7903627A
Other languages
French (fr)
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.)
Beckman Instruments GmbH
Original Assignee
Beckman Instruments GmbH
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 Beckman Instruments GmbH filed Critical Beckman Instruments GmbH
Publication of FR2417099A1 publication Critical patent/FR2417099A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners

Landscapes

  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne une méthode pour l'analyse précise d'un échantillon dans des photomètres à absorption et émission de flammes utilisant une boucle électrique de contrôle par rétroaction pour maintenir un niveau constant d'énergie afin de compenser un glissement de l'instrument provoqué essentiellement par des variations de température. Selon l'invention, l'interruption de la boucle de contrôle, nécessaire pour les mesures des solutions neutre, standard et de l'échantillon, est contrôlée automatiquement par le rayonnement caractéristique des composants du solvant émis par la flamme 2 et capté par un détecteur auxiliaire 4b agencé à l'extérieur de la trajectoire optique. L'invention s'applique notamment aux déterminations quantitatives et très précises de traces, par exemple de calcium ou magnésium dans le sérum humain.A method for the accurate analysis of a sample in flame absorption and emission photometers using an electrical feedback control loop to maintain a constant level of energy to compensate for induced instrument slip is disclosed. mainly by temperature variations. According to the invention, the interruption of the control loop, necessary for the measurements of the neutral, standard and sample solutions, is automatically controlled by the radiation characteristic of the components of the solvent emitted by the flame 2 and picked up by a detector auxiliary 4b arranged outside the optical path. The invention applies in particular to quantitative and very precise determinations of traces, for example of calcium or magnesium in human serum.

FR7903627A 1978-02-14 1979-02-13 METHOD FOR THE PRECISE ANALYSIS OF SAMPLES IN FLAME ABSORPTION AND EMISSION PHOTOMETERS, USING A FEEDBACK ELECTRICAL CONTROL LOOP TO COMPENSATE FOR AN ENERGY SLIP Withdrawn FR2417099A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782806145 DE2806145C3 (en) 1978-02-14 1978-02-14 Process for the exact acquisition of the measured values in flame absorption and emission photometers with the use of an electrical control on a constant display for the compensation of a device drift

Publications (1)

Publication Number Publication Date
FR2417099A1 true FR2417099A1 (en) 1979-09-07

Family

ID=6031911

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7903627A Withdrawn FR2417099A1 (en) 1978-02-14 1979-02-13 METHOD FOR THE PRECISE ANALYSIS OF SAMPLES IN FLAME ABSORPTION AND EMISSION PHOTOMETERS, USING A FEEDBACK ELECTRICAL CONTROL LOOP TO COMPENSATE FOR AN ENERGY SLIP

Country Status (5)

Country Link
JP (1) JPS54139591A (en)
AU (1) AU4415779A (en)
DE (1) DE2806145C3 (en)
FR (1) FR2417099A1 (en)
GB (1) GB2014304B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415264A (en) * 1981-06-25 1983-11-15 The Perkin-Elmer Corporation Spectrophotometer gas control system
GB2113831B (en) * 1982-01-19 1985-10-02 Philips Electronic Associated Method of analysis using atomic absorption spectrophotometry
GB2135446B (en) * 1983-02-11 1986-05-08 Itt Ind Ltd Fluid flow measurement
JPS60262044A (en) * 1984-06-08 1985-12-25 Hitachi Ltd Flame type atomic absorption spectrometer
DE3905782A1 (en) * 1989-02-24 1990-08-30 Bodenseewerk Perkin Elmer Co METHOD FOR DETERMINING THE CONCENTRATION BY ATOMIC ABSORPTION SPECTROSCOPY

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3583844A (en) * 1969-06-09 1971-06-08 Instrumentation Labor Inc Atomic absorption spectroanalytical instrument control system
US3620628A (en) * 1968-05-04 1971-11-16 Hitachi Ltd Photoelectric sample measuring apparatus
DE1673348A1 (en) * 1966-10-20 1972-01-13 Zeiss Carl Fa Method and device for the spectroscopic analysis of solids, solutions and gases

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999383A (en) * 1960-06-02 1961-09-12 Ford Motor Co Metallic tracer method for determining lubricant in engine exhaust
GB1515791A (en) * 1975-07-07 1978-06-28 Commw Scient Ind Res Org General purpose atomic spectrometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673348A1 (en) * 1966-10-20 1972-01-13 Zeiss Carl Fa Method and device for the spectroscopic analysis of solids, solutions and gases
US3620628A (en) * 1968-05-04 1971-11-16 Hitachi Ltd Photoelectric sample measuring apparatus
US3583844A (en) * 1969-06-09 1971-06-08 Instrumentation Labor Inc Atomic absorption spectroanalytical instrument control system

Also Published As

Publication number Publication date
DE2806145A1 (en) 1979-08-16
JPS54139591A (en) 1979-10-30
DE2806145C3 (en) 1982-01-28
AU4415779A (en) 1979-08-23
DE2806145B2 (en) 1981-05-14
GB2014304A (en) 1979-08-22
GB2014304B (en) 1982-06-03

Similar Documents

Publication Publication Date Title
US3950101A (en) Measuring the heating value of a fuel in the gaseous state: method and apparatus
GB1385791A (en) Atomic spectroscopy
GB1221463A (en) Improved spectroanalysis system
EP0091126A2 (en) Fluorimeter
US3032654A (en) Emission spectrometer
FR2417099A1 (en) METHOD FOR THE PRECISE ANALYSIS OF SAMPLES IN FLAME ABSORPTION AND EMISSION PHOTOMETERS, USING A FEEDBACK ELECTRICAL CONTROL LOOP TO COMPENSATE FOR AN ENERGY SLIP
US4299494A (en) Measurement of heat transfer between a specimen and an ambient medium
Kometani et al. Measurement of Ga and Al in a molecular‐beam epitaxy chamber by atomic absorption spectrometry (AAS)
Farah et al. Developments and applications of multielement graphite furnace atomic absorption spectrometry
Blank et al. Double-beam photoacoustic spectrometer for use in the ultraviolet, visible, and near-infrared spectral regions
US3506358A (en) Rapid scanning spectrophotometer of double beam mode
Steenhoek et al. Spatial mapping of concentrations in pulsed and continuous atom sources
US3428796A (en) Concentration computer with logarithmic computation of photometric apparatus readings
US4733084A (en) Method of detection and quantitative determination of sulfur and sulfur monitor using the method
US3609042A (en) Optical measuring apparatus for sampling material, making a flame test, and comparing the light from an unknown concentration with that from two known concentrations
US2844033A (en) Radiant energy measurement methods and apparatus
GB1513938A (en) Determination of the concentration ratio between two components of a mixture of substances
JPS602615B2 (en) Energy compensated spectrofluorometer
US4128336A (en) Spectroscopic apparatus and method
JP2894364B2 (en) Optical measuring device
Cochran et al. Selective spectral-line modulation technique for high sensitivity continuum-source atomic absorption spectrometry
US3883248A (en) Method and apparatus for measuring concentration of substance in its gaseous phase
Renzetti Automatic Long-Path Ultroviolet Spectrometer for Determination of Ozone in the Atmosphere
US3680960A (en) Atomic absorption photometer
Thiers et al. Interference—free Flame Photometry of Calcium in Serum and Urine

Legal Events

Date Code Title Description
ST Notification of lapse