Abstract:
There is provided a structure to make the setting of a criterion for eliminating noises easy in the scanning molecule counting method. In the inventive optical analysis technique of detecting light of a light-emitting particle in a sample solution, time series light intensity data of light from a light detection region detected with moving the position of the light detection region in the sample solution is generated, and a signal of a light-emitting particle individually is detected in the time series light intensity data, wherein a signal having a light intensity in a light intensity range set based upon a signal generation frequency integrated value distribution which is a distribution, obtained by using as a variable an intensity of a signal, of integrated values of generation frequencies of signals having an intensity not lower than the variable is extracted as the signal of the light-emitting particle.
Abstract:
In the scanning molecule counting method using the light measurement with a confocal microscope or a multiphoton microscope, a measuring time is optimized with suppressing the scattering in a result small irrespective of light-emitting particle concentrations. In the inventive technique of detecting and analyzing the light from an light-emitting particle, there are repeated processes of detecting the light intensity from a light detection region with moving the position of the light detection region of an optical system in a sample solution by changing the optical path of the optical system of the microscope, and detecting the signals of the light of light-emitting particles individually, and based on the time taken for the number of the signals from the light-emitting particles to reach a predetermined number, the light-emitting particle concentration in the sample solution is determined.
Abstract:
There is provided an optical analysis technique enabling identification of a kind of light-emitting particle corresponding to a signal on a time series light intensity data or identification of a signal corresponding to light-emitting particles other than a particle to be observed in an optical measurement using a confocal microscope or a multiphoton microscope. The inventive optical analysis technique measures simultaneously and separately intensities of lights of two or more wavelength bands from a light detection region in a sample solution containing light-emitting particles of two or more kinds to generate time series light intensity data of the respective wavelength bands; detects signals simultaneously generated on the time series light intensity data of at least two wavelength bands; and identifies the simultaneously generated signals as signals of a light-emitting particle of at least one specific kind.
Abstract:
There is provided a method of avoiding deterioration of the accuracy in the number of detected light-emitting particles due to that two or more light-emitting particles are encompassed at a time in the light detection region in the scanning molecule counting method using an optical measurement with a confocal microscope or a multiphoton microscope. In the inventive optical analysis technique, in the detection of an individual signal indicating light of a light-emitting particle by selectively detecting a signal having an intensity beyond a threshold value as a signal indicating light of a light-emitting particle in light intensity data produced through measuring light intensity during moving the position of a light detection region in a sample solution, the threshold value is set so that a signal indicating light from a light-emitting particle encompassed in a region narrower than the light detection region will be detected selectively.