Quantitative determination method for target particles, photometric analysis device, and computer program for photometric analysis
First Claim
1. A method for quantifying target particles which are dispersed and moving at random in a sample solution, the method comprising:
- (a) preparing a sample solution containing the target particles and luminescent probes to be bound to the target particles, and binding the target particles and the luminescent probes in the sample solution;
(b) moving a position of a light detection region of an optical system in the sample solution with use of an optical system of a confocal microscope or a multiphoton microscope, and detecting a light signal emitted from the luminescent probes in the light detection region while moving the position of the light detection region of the optical system in the sample solution, and individually detecting the target particle directly or indirectly; and
(c) counting, using a processor, the number of the target particles detected in the (b) and calculating, using the processor, the concentration of the target particles in the sample solution from the number of the counted target particles on the basis of a calibration curve that approximates the correlation between the concentration or quantity of the target particles in the sample solution and the number of the target particles.
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Abstract
The method of the present invention includes: preparing a sample solution containing the target particles and luminescent probes to be bound to the target particles, and binding these in the sample solution; moving a position of a light detection region of the optical system in the sample solution using a confocal microscope or a multiphoton microscope, and detecting light signal emitted from the luminescent probe in the light detection region while moving the position of the light detection region, and individually detecting the target particles directly or indirectly; and counting the number of the detected target particles, and calculating the concentration of the target particles in the sample solution from the number of the counted target particles on the basis of a calibration curve that approximates the correlation between the concentration or quantity of the target particles in the sample solution and the number of the target particles.
44 Citations
20 Claims
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1. A method for quantifying target particles which are dispersed and moving at random in a sample solution, the method comprising:
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(a) preparing a sample solution containing the target particles and luminescent probes to be bound to the target particles, and binding the target particles and the luminescent probes in the sample solution; (b) moving a position of a light detection region of an optical system in the sample solution with use of an optical system of a confocal microscope or a multiphoton microscope, and detecting a light signal emitted from the luminescent probes in the light detection region while moving the position of the light detection region of the optical system in the sample solution, and individually detecting the target particle directly or indirectly; and (c) counting, using a processor, the number of the target particles detected in the (b) and calculating, using the processor, the concentration of the target particles in the sample solution from the number of the counted target particles on the basis of a calibration curve that approximates the correlation between the concentration or quantity of the target particles in the sample solution and the number of the target particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A photometric analysis device for detecting light from luminescent particles dispersed and moving at random in a sample solution, with use of an optical system of a confocal microscope or a multiphoton microscope, the device comprising:
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a light detection region mover for moving a position of a light detection region of the optical system in the sample solution by changing an optical path of the optical system; a light detector for detecting light from the luminescent particle in the light detection region; a signal processor for individually detecting a light signal of the light emitted from respective ones of the luminescent particles detected in the light detector while moving the position of the light detection region in the sample solution, and counting the number of the luminescent particles detected during the moving of the position of the light detection region by counting the number of the individually detected light signals from the luminescent particle; a storage for storing a calibration curve that approximates the correlation between the concentration or quantity of the luminescent particles in the sample solution and the number of the luminescent particles counted from the sample solution; a concentration calculator for, on the basis of the calibration curve, calculating the concentration of the luminescent particles in the sample solution from the number of the luminescent particles counted in the signal processor; and a display for displaying the concentration of the luminescent particles in the sample solution calculated by the concentration calculator. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A non-transitory computer readable storage device having a computer program product including programmed instructions for photometric analysis of detecting light from a luminescent particle dispersed and moving at random in a sample solution, with use of an optical system of a confocal microscope or a multiphoton microscope, the programmed instructions causing a computer to perform the steps comprising:
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changing the optical path of the optical system, so as to move a position of a light detection region of the optical system in the sample solution; detecting the light from the luminescent particle in the light detection region, while moving the position of the light detection region in the sample solution; individually detecting a light signal of the light emitted from respective ones of the detected luminescent particle; counting the number of the luminescent particles detected during the moving of the position of the light detection region by counting the number of the individually detected light signals of the light from the luminescent particles; and calculating the concentration of the target particles in the sample solution from the counted number of the luminescent particles on the basis of a calibration curve that approximates the correlation between the concentration or quantity of the luminescent particles in the sample solution and the number of the luminescent particles counted from the sample solution. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification