FR2263102A1 - Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten - Google Patents

Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten

Info

Publication number
FR2263102A1
FR2263102A1 FR7407189A FR7407189A FR2263102A1 FR 2263102 A1 FR2263102 A1 FR 2263102A1 FR 7407189 A FR7407189 A FR 7407189A FR 7407189 A FR7407189 A FR 7407189A FR 2263102 A1 FR2263102 A1 FR 2263102A1
Authority
FR
France
Prior art keywords
determn
metals
rhenium
tungsten
followed
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.)
Granted
Application number
FR7407189A
Other languages
French (fr)
Other versions
FR2263102B1 (en
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.)
PIERRELATTE USINES CHIMIQUES
Original Assignee
PIERRELATTE USINES CHIMIQUES
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 PIERRELATTE USINES CHIMIQUES filed Critical PIERRELATTE USINES CHIMIQUES
Priority to FR7407189A priority Critical patent/FR2263102A1/en
Publication of FR2263102A1 publication Critical patent/FR2263102A1/en
Application granted granted Critical
Publication of FR2263102B1 publication Critical patent/FR2263102B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
    • C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
    • C23C16/14—Deposition of only one other metal element
    • 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
    • G01N21/74—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 flameless atomising, e.g. graphite furnaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals
    • G01N33/202—Constituents thereof
    • G01N33/2028—Metallic constituents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Medicinal Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

A hollow tubular body comprises a graphite substrate coated at least partially with a layer (I) of rhenium a few microns thick, followed by a layer (II) of tungsten between several tens and several hundreds of microns thick. Alternatively the substrate may be coated only with Re, several tens to several hundred microns thick. The layers are pref. obtd. by the decompsn. of ReF6 or WF6 in H2 at high temp. and low pressure. The coated tube is pref. used in appts. for atomic absorption spectrophotometry for the determn. of metals forming carbides which are stable at high temp., esp. Cr, Ca, Mo, V, W, Ti, Zr, Hf, Ta, Nb, where a soln. of the metal is carried by a gas into the tube, which is above 2000 degrees C so the metals are atomised. Atomic absorption spectrophotometry can now by rapidly, accurately and economically used for determn. of metals forming stable carbides which previously led to false results. By coating the graphite tube with rhenium followed by tungsten the carburisation of the outer layer of W by the graphite is precluded and accurate determn. of the above metals is possible.
FR7407189A 1974-03-04 1974-03-04 Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten Granted FR2263102A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7407189A FR2263102A1 (en) 1974-03-04 1974-03-04 Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7407189A FR2263102A1 (en) 1974-03-04 1974-03-04 Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten

Publications (2)

Publication Number Publication Date
FR2263102A1 true FR2263102A1 (en) 1975-10-03
FR2263102B1 FR2263102B1 (en) 1976-12-10

Family

ID=9135743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7407189A Granted FR2263102A1 (en) 1974-03-04 1974-03-04 Determn. of metals by atomic absorption spectrophotometry - using graphite tube coated with rhenium followed by tungsten

Country Status (1)

Country Link
FR (1) FR2263102A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401602A1 (en) * 1989-06-09 1990-12-12 General Electric Company Method and apparatus for forming coatings of finegrated and/or equiaxed grain structure and articles resulting therefrom.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401602A1 (en) * 1989-06-09 1990-12-12 General Electric Company Method and apparatus for forming coatings of finegrated and/or equiaxed grain structure and articles resulting therefrom.

Also Published As

Publication number Publication date
FR2263102B1 (en) 1976-12-10

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse