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US 5,283,624 AGranted
Multi-element simultaneous analysis atomic absorption spectroscopy photometer and multi-element simultaneous analytic method
AssigneeHitachi, Ltd.
InventorsMasamichi Tsukada, Konosuke Oishi
Life of this patent
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Abstract
Incident slits and exit slits are provided separately on corresponding optical axes incident simultaneously on a spectroscope from a sample atomizing unit. A mechanism for changing the widths of the respective incident slits and exiting slits is provided such that the slit widths optimal to the respective elements to be measured are set on the corresponding optical axes to thereby realize high sensitivity analysis of all the elements to be measured simultaneously.
Claims32
A control system for a filtration plant for purifying water from a reception port, and feeding the water, comprising means for sampling the fed water, a sample atomizing unit for evaporating the sampled water, and a plurality of separate optical systems using said atomizing unit in common, a plurality of photodetectors for detecting light beams having passed through said atomizing unit in the corresponding optical systems, and means for stopping feeding of the water when one of said photodetectors detects a quantity of a particular element exceeding a prescribed value.
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- spectroscope means disposed on the plurality of optical axes for performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- a plurality of incident slits respectively disposed on the plurality of optical axes between the sample atomizing unit and the spectroscope means;
- detecting means disposed on the plurality of optical axes for detecting spectrally processed light exiting from the spectroscope means;
- a plurality of exit slits respectively disposed on the plurality of optical axes between the spectroscope means and the detecting means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the detecting means;
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
7 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- a plurality of spectroscope means respectively disposed on the plurality of optical axes for respectively performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- detecting means disposed on the plurality of optical axes for detecting spectrally processed light exiting from the plurality of spectroscope means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the detecting means;
- wherein at least one of the plurality of spectroscope means has a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- said multi-element simultaneous analysis atomic absorption spectroscopy photometer further comprising:
- a plurality of incident slits respectively disposed on the plurality of optical axes between the sample atomizing unit and the plurality of spectroscope means;
- and
- a plurality of exit slits respectively disposed on the plurality of optical axes between the plurality of spectroscope means and the detecting means;
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
10 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- a plurality of spectroscope means respectively disposed on the plurality of optical axes for respectively performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- detecting means disposed on the plurality of optical axes for detecting spectrally processed light exiting from the plurality of spectroscope means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the detecting means;
- wherein at least one of the plurality of spectroscope means has a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- and
- wherein at least one of the plurality of spectroscope means includes:
- a plurality of diffraction gratings having mutually different spectral characteristics;
- and
- means for disposing a selected one of the plurality of diffraction gratings on one of the plurality of optical axes on which the at least one spectroscope means is disposed.
10 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- spectroscope means disposed on the plurality of optical axes for performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- a plurality of detecting means respectively disposed on the plurality of optical axes for detecting spectrally processed light exiting from the spectroscope means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the plurality of detecting means;
- wherein at least one of the plurality of detecting means has a detecting characteristic different from detecting characteristics of remaining ones of the plurality of detecting means;
- said multi-element simultaneous analysis atomic absorption spectroscopy photometer further comprising:
- a plurality of incident slits respectively disposed on the plurality of optical axes between the sample atomizing unit and the spectroscope means;
- and
- a plurality of exit slits respectively disposed on the plurality of optical axes between the spectroscope means and the plurality of detecting means;
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
10 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- a plurality of spectroscope means respectively disposed on the plurality of optical axes for respectively performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- a plurality of incident slits respectively disposed on the plurality of optical axes between the sample atomizing unit and the plurality of spectroscope means;
- a plurality of detecting means respectively disposed on the plurality of optical axes for respectively detecting spectrally processed light exiting from the plurality of spectroscope means;
- a plurality of exit slits respectively disposed on the plurality of optical axes between the plurality of spectroscope means and the plurality of detecting means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the plurality of detecting means;
- wherein at least one of the plurality of spectroscope means has a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- wherein at least one of the plurality of detecting means has a detecting characteristic different from detecting characteristics of remaining ones of the plurality of detecting means;
- and
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
10 more elements
An atomic absorption analysis method for simultaneously analyzing a plurality of elements, comprising the steps of:
- atomizing a sample including a plurality of elements;
- directing light from a plurality of light sources along a respective plurality of optical axes extending through the atomized sample;
- disposing spectroscope means on the plurality of optical axes to receive light from the plurality of light sources exiting from the atomized sample;
- respectively disposing a plurality of incident slits on the plurality of optical axes between the atomized sample and the spectroscope means;
- performing spectral processing of the light from the plurality of light sources exiting from the atomized sample with the spectroscope means;
- disposing detecting means on the plurality of optical axes to receive spectrally processed light exiting from the spectroscope means;
- respectively disposing a plurality of exit slits on the plurality of optical axes between the spectroscope means and the detecting means;
- detecting the spectrally processed light exiting from the spectroscope means with the detecting means;
- and
- determining an amount of each of the plurality of elements in the atomized sample based on the spectrally processed light detected by the detecting means;
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
8 more elements
An atomic absorption analysis method for simultaneously analyzing a plurality of elements, comprising the steps of:
- atomizing a sample including a plurality of elements;
- directing light from a plurality of light sources along a respective plurality of optical axes extending through the atomized sample;
- respectively disposing a plurality of spectroscope means on the plurality of optical axes to respectively receive light from the plurality of light sources exiting from the atomized sample, at least one of the plurality of spectroscope means having a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- respectively disposing a plurality of incident slits on the plurality of optical axes between the atomized sample and the plurality of spectroscope means;
- respectively performing spectral processing of the light from the plurality of light sources exiting from the atomized sample with the plurality of spectroscope means;
- respectively disposing a plurality of detecting means on the plurality of optical axes to respectively receive spectrally processed light exiting from the plurality of spectroscope means, at least one of the plurality of detecting means having a detecting characteristic different from detecting characteristics of remaining ones of the plurality of detecting means;
- respectively disposing a plurality of exit slits on the plurality of optical axes between the plurality of spectroscope means and the plurality of detecting means;
- respectively detecting the spectrally processed light exiting from the plurality of spectroscope means with the plurality of detecting means;
- and
- determining an amount of each of the plurality of elements in the atomized sample based on the spectrally processed light detected by the plurality of detecting means;
- wherein ones of the incident slits and the exit slits disposed on same ones of the optical axes have slit widths equal to each other.
8 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- a plurality of spectroscope means respectively disposed on the plurality of optical axes for respectively performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- detecting means disposed on the plurality of optical axes for detecting spectrally processed light exiting from the plurality of spectroscope means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the detecting means;
- wherein at least one of the plurality of spectroscope means has a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- and
- wherein the spectral processing characteristic of the at least one of the plurality of spectroscope means differs from the spectral processing characteristics of the remaining ones of the plurality of spectroscope means in at least one factor other than a selected wavelength.
7 more elements
A multi-element simultaneous analysis atomic absorption spectroscopy photometer comprising:
- a sample atomizing unit for atomizing a sample including a plurality of elements;
- means for defining a plurality of optical axes passing through the sample atomizing unit;
- a plurality of light sources respectively disposed on the plurality of optical axes;
- spectroscope means disposed on the plurality of optical axes for performing spectral processing of light from the plurality of light sources exiting from the sample atomizing unit;
- a plurality of detecting means respectively disposed on the plurality of optical axes for detecting spectrally processed light exiting from the spectroscope means;
- and
- means for determining an amount of each of the plurality of elements in the sample atomized in the sample atomizing unit based on the spectrally processed light detected by the plurality of detecting means;
- wherein at least one of the plurality of detecting means has a detecting characteristic different from detecting characteristics of remaining ones of the plurality of detecting means;
- and
- wherein the detecting characteristics of the at least one of the plurality of detecting means differs from the detecting characteristics of the remaining ones of the plurality of detecting means in at least a sensitivity characteristic.
7 more elements
An atomic absorption analysis method for simultaneously analyzing a plurality of elements, comprising the steps of:
- atomizing a sample including a plurality of elements;
- directing light from a plurality of light sources along a respective plurality of optical axes extending through the atomized sample;
- respectively disposing a plurality of spectroscope means on the plurality of optical axes to respectively receive light from the plurality of light sources exiting from the atomized sample, at least one of the plurality of spectroscope means having a spectral processing characteristic different from spectral processing characteristics of remaining ones of the plurality of spectroscope means;
- respectively performing spectral processing of the light from the plurality of light sources exiting from the atomized sample with the plurality of spectroscope means;
- disposing detecting means on the plurality of optical axes to receive spectrally processed light exiting from the plurality of spectroscope means;
- detecting the spectrally processed light exiting from the plurality of spectroscope means with the detecting means;
- and
- determining an amount of each of the plurality of elements in the atomized sample based on the spectrally processed light detected by the detecting means;
- wherein the spectral processing characteristic of the at least one of the plurality of spectroscope means differs from the spectral processing characteristics of the remaining ones of the plurality of spectroscope means in at least one factor other than a selected wavelength.
6 more elements
An atomic absorption analysis means for simultaneously analyzing a plurality of elements, comprising the steps of:
- atomizing a sample including a plurality of elements;
- directing light from a plurality of light sources along a respective plurality of optical axes extending through the atomized sample;
- disposing spectroscope means on the plurality of optical axes to receive light from the plurality of light sources exiting from the atomized sample;
- performing spectral processing of the light from the plurality of light sources exiting from the atomized sample with the spectroscope means;
- disposing a plurality of detecting means on the plurality of optical axes to receive spectrally processed light exiting from the spectroscope means, at least one of the plurality of detecting means having a detecting characteristic different from detecting characteristics of remaining ones of the plurality of detecting means;
- detecting the spectrally processed light exiting from the spectroscope means with the plurality of detecting means;
- and
- determining an amount of each of the plurality of elements in the atomized sample based on the spectrally processed light detected by the plurality of detecting means;
- wherein the detecting characteristic of the at least one of the plurality of detecting means differs from the detecting characteristics of the remaining ones of the plurality of detecting means in at least a sensitivity characteristic.
6 more elements
Dependencies are inferred from the claim text.