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Atomic absorption spectrophotometer with furnace at pressure equal or near light source pressure
Spewochhrica Acta, Vol. 45B, No. 8, pp. V-VI. Printed in Great Britain.
0584+7547/90 $3.00 + .oo Pergamon PIesa plc
1990
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications flied from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH* can be obtained from 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. for $8 ner CODY.Pavment with order is reauired. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
An atomic absorption spectrophotometer for simultaneously measuring a plurality of elements different in kind from each other. A cylindrical heating furnace is provided for heating a sample being analyzed to dry, ash and atomize the sample thereby producing atomic vapor. A plurality of hollow-cathode discharge tubes corresponding in number to the elements being detected are arranged for simultaneously emitting light beams respectively containing line spectra of the respective elements, to cause the light beams to be incident upon the heating furnace at respective angles of inclination with respect to a central axis of the heating furnace. A plurality of spectral detection systems are arranged behind the heating furnace in relation to the angles of inclination, for respectively spectral-diffracting and receiving the light beams having their respective line spectra absorbed by the atomic vapor. A signal processing device is provided for carrying out calculation to obtain concentrations or quantities of the respective elements in the sample being analyzed, on the basis of respective ratios of atomic resonance absorption of the respective line spectra spectraldetected.
4840484
ATOMIC ABSORPTION SPECTROPHOTOMETER WITH FURNACE AT PRESSURE EQUAL OR NEAR LIGHT SOURCE PRESSURE Konosuk Oishi, Toyoharu Okumoto, Hayato Tobe, Masamichi Tsukada, Mito, Japan assigned to Hitachi Ltd In an atomic absorption spectrophotometer including an electric furnace for drying and ashing a liquid sample to be analyzed and then atomizing the sample to generate atomic vapor, a low-pressure lamp for emitting light having a spectrum of an element to be analyzed onto the atomic vapor atomized in the electric furnace, a monochromator for splitting the transmitted light from the electric furnace and selecting a wavelength of an atomic absorption line absorbed by the element to be analyzed, and a signal processing unit for performing signal processing on the light having the selected wavelength supplied from the monochromator, the electric furnace is an airtight mechanism for maintaining airtightness of the inside of the electric furnace and an evacuation unit for evacuating the inside of the electric furnace to a pressure equal to the pressure inside the lamp.
4889987 PHOTO ION SPECTROMETER Dieter M Gruen, Charles E Young, Michael J Pellin assigned to ARCH Development Corporation
4867562 ATOMIC ABSORPTION SPECTROPHOTOMETER
A charged particle spectrometer for performing ultrasensitive quantitative analysis of selected atomic components removed from a sample. Significant improvements in performing energy and angular refocusing spectroscopy are accomplished by means of a two dimensional structure for generating predetermined elec-
Konosuke Oishi, Tsukada, Masamichi Masatoshi Kitagawa, Toyoharu Okumoto, Hayato Tobe, Mito, Japan assigned to Hitachi Ltd V
0584+7547/90 $3.00 + .oo Pergamon PIesa plc
1990
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications flied from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH* can be obtained from 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. for $8 ner CODY.Pavment with order is reauired. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
An atomic absorption spectrophotometer for simultaneously measuring a plurality of elements different in kind from each other. A cylindrical heating furnace is provided for heating a sample being analyzed to dry, ash and atomize the sample thereby producing atomic vapor. A plurality of hollow-cathode discharge tubes corresponding in number to the elements being detected are arranged for simultaneously emitting light beams respectively containing line spectra of the respective elements, to cause the light beams to be incident upon the heating furnace at respective angles of inclination with respect to a central axis of the heating furnace. A plurality of spectral detection systems are arranged behind the heating furnace in relation to the angles of inclination, for respectively spectral-diffracting and receiving the light beams having their respective line spectra absorbed by the atomic vapor. A signal processing device is provided for carrying out calculation to obtain concentrations or quantities of the respective elements in the sample being analyzed, on the basis of respective ratios of atomic resonance absorption of the respective line spectra spectraldetected.
4840484
ATOMIC ABSORPTION SPECTROPHOTOMETER WITH FURNACE AT PRESSURE EQUAL OR NEAR LIGHT SOURCE PRESSURE Konosuk Oishi, Toyoharu Okumoto, Hayato Tobe, Masamichi Tsukada, Mito, Japan assigned to Hitachi Ltd In an atomic absorption spectrophotometer including an electric furnace for drying and ashing a liquid sample to be analyzed and then atomizing the sample to generate atomic vapor, a low-pressure lamp for emitting light having a spectrum of an element to be analyzed onto the atomic vapor atomized in the electric furnace, a monochromator for splitting the transmitted light from the electric furnace and selecting a wavelength of an atomic absorption line absorbed by the element to be analyzed, and a signal processing unit for performing signal processing on the light having the selected wavelength supplied from the monochromator, the electric furnace is an airtight mechanism for maintaining airtightness of the inside of the electric furnace and an evacuation unit for evacuating the inside of the electric furnace to a pressure equal to the pressure inside the lamp.
4889987 PHOTO ION SPECTROMETER Dieter M Gruen, Charles E Young, Michael J Pellin assigned to ARCH Development Corporation
4867562 ATOMIC ABSORPTION SPECTROPHOTOMETER
A charged particle spectrometer for performing ultrasensitive quantitative analysis of selected atomic components removed from a sample. Significant improvements in performing energy and angular refocusing spectroscopy are accomplished by means of a two dimensional structure for generating predetermined elec-
Konosuke Oishi, Tsukada, Masamichi Masatoshi Kitagawa, Toyoharu Okumoto, Hayato Tobe, Mito, Japan assigned to Hitachi Ltd V