Electrothermal atomiser
1
NEW PATENTS This%&XI contains abstracts and, where appropriate, i&&rations of recently issued &ited States patents published patent applications f&d from over 30 countries under the Patent Cooperation Treaty. This informa was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with inte profiles developed by the Editors. Further information about Pergamon PATSEARCH@ can be obtained f Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. fo per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by pa number for Pergamon Orbit InfoLine only. 4729656 John E Churchill, Michael D Flack, David S Widmer, Cambridge, United Kingdom assigned to U S Philips Corporation An electrothermal atomizer comprises a tubular graphite body (1) whose ends are clamped bet- ween two pairs of graphite contact members (2,4;3,5) which are arranged to form a cantain- ment zone for the tubular body (1). The graphite contact members (22,4;3,S) clamp the ends of the tubular body (I) in a radial direction and are separable from each other by an upwardly pivot- ting movement of the members (2,3). The lower contact members (4,5) are urged towards each other in the direction of the longitudinal axis of the tubular body (I) by means of a leaf spring (42) so that when the clamping force on the tubular body (1) is released by raising the upper contact members (2,3) the tubular body (1) is lightly retained by the lower contact members (4,5). Thus easy access for adjusting the orienta- tion of the tubular body (1) can be obtained, for example to adjust the orientation of the dosing aperture and/or probe entry slot (8). 4730925 METHOD OF SPECTROSCOPICALLY DETERMINING THE C~M~S~TrUN OF MULTEN IRON Koichi Chiba, Akihiro Ono, Takamasa Ohno, Masaki Okajima, Hiroshi Yamane, Minoru v Hayata, Kawasaki, Japan assigned to Nip] Steel Corporation Oxygen or a mixed gas containing oxygen, 6 chemical flame produced by a mixture of a c( bustion gas and a combustion-assisting gas c taining oxygen, is blown against the surface molten iron to cause radiation emission. ’ radiations are divided into components of ferent wavelengths, and the resulting en& spectra are mkasured to determine the camp tion of the molten iron. 4731334 MIXUP AND APPARATUS FC DETECTING AND QUANTITATIVELY DETERMINING SELENIUM Hajime Oosaka, Osaka, Japan assigned ~umitomo Electric Industries Ltd Gaseous selenium is detected and quantitati- determined at a temperature lower than the tl peratures employed in the atomic absorpi spectroscopic analysis method of the prior This is achieved by directing a spectrum line F a wavelength of 335 nm or by two or n: spectrum lines having wavelengths of 324 : 326 mn, 328 nm, 330 nm, 332.5 nm, 335 I 337.5 nm, 340 nm, 342 nm, 344.5 nm, 347 I 350 nm, 352.5 nm, 355 nm, 357.3 nm and 360 upon gaseous selenium at a temperature of lo than the atomizing temperature of seleni measuring the absorption of the incit spectrum line by the gaseous selenium and de ting and quantitatively determining the selen from the peak height of this intensity.
Transcript of Electrothermal atomiser
NEW PATENTS
This %&XI contains abstracts and, where appropriate, i&&rations of recently issued &ited States patents published patent applications f&d from over 30 countries under the Patent Cooperation Treaty. This informa was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with inte profiles developed by the Editors. Further information about Pergamon PATSEARCH@ can be obtained f Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A.
Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. fo per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by pa number for Pergamon Orbit InfoLine only.
4729656
John E Churchill, Michael D Flack, David S Widmer, Cambridge, United Kingdom assigned to U S Philips Corporation
An electrothermal atomizer comprises a tubular graphite body (1) whose ends are clamped bet- ween two pairs of graphite contact members (2,4;3,5) which are arranged to form a cantain- ment zone for the tubular body (1). The graphite contact members (22,4;3,S) clamp the ends of the tubular body (I) in a radial direction and are separable from each other by an upwardly pivot- ting movement of the members (2,3). The lower contact members (4,5) are urged towards each other in the direction of the longitudinal axis of the tubular body (I) by means of a leaf spring (42) so that when the clamping force on the tubular body (1) is released by raising the upper contact members (2,3) the tubular body (1) is lightly retained by the lower contact members (4,5). Thus easy access for adjusting the orienta- tion of the tubular body (1) can be obtained, for example to adjust the orientation of the dosing aperture and/or probe entry slot (8).
4730925
METHOD OF SPECTROSCOPICALLY
DETERMINING THE C~M~S~TrUN OF MULTEN
IRON
Koichi Chiba, Akihiro Ono, Takamasa Ohno, Masaki Okajima, Hiroshi Yamane, Minoru
v
Hayata, Kawasaki, Japan assigned to Nip] Steel Corporation
Oxygen or a mixed gas containing oxygen, 6 chemical flame produced by a mixture of a c( bustion gas and a combustion-assisting gas c taining oxygen, is blown against the surface molten iron to cause radiation emission. ’ radiations are divided into components of ferent wavelengths, and the resulting en& spectra are mkasured to determine the camp tion of the molten iron.
4731334
MIXUP AND APPARATUS FC DETECTING AND
QUANTITATIVELY DETERMINING SELENIUM
Hajime Oosaka, Osaka, Japan assigned ~umitomo Electric Industries Ltd
Gaseous selenium is detected and quantitati- determined at a temperature lower than the tl peratures employed in the atomic absorpi spectroscopic analysis method of the prior This is achieved by directing a spectrum line F a wavelength of 335 nm or by two or n: spectrum lines having wavelengths of 324 : 326 mn, 328 nm, 330 nm, 332.5 nm, 335 I
337.5 nm, 340 nm, 342 nm, 344.5 nm, 347 I
350 nm, 352.5 nm, 355 nm, 357.3 nm and 360 upon gaseous selenium at a temperature of lo than the atomizing temperature of seleni measuring the absorption of the incit spectrum line by the gaseous selenium and de ting and quantitatively determining the selen from the peak height of this intensity.
