Method for calibrating biological particle counter and calibration device of biological particle counter

Patent metadata

Field	Value
Publication number	US-2019003951-A1
Application number	US-201616064266-A
Country	US
Kind code	A1
Filing date	Dec 5, 2016
Priority date	Dec 25, 2015
Publication date	Jan 3, 2019
Grant date	—

Abstract

The biological particle counter has a first circuit configured to generate a first signal corresponding to fluorescence from the biological particle in response to irradiated light. A measurement value obtainer is configured to obtain, from the biological particle counter, a voltage value of the first signal for a calibration particle obtained in such a manner that a fluorescence agent infiltrates into a surface of a polystyrene particle. A circuit adjuster is configured to use reference data indicating a correspondence relation between a fluorescence agent parameter value correlated to the content of the fluorescence agent and a reference voltage value of the first signal corresponding to the fluorescence agent parameter value, thereby specifying the reference voltage value of the first signal corresponding to the fluorescence agent parameter value for the calibration particle. The first circuit is adjusted such that the voltage value of the first signal for the calibration particle reaches the reference voltage value.

First claim

1 . A method for calibrating a biological particle counter, comprising:
a first measurement step of generating a first signal for a calibration particle by the biological particle counter including a first circuit and configured to count a biological particle based on the first signal, the first circuit being configured to generate the first signal corresponding to fluorescence from the biological particle in response to irradiated light; and a first adjustment step of adjusting the first circuit such that a voltage value of the first signal for the calibration particle reaches a reference voltage value, wherein the calibration particle is a particle obtained in such a manner that a fluorescence agent infiltrates into a surface of a polystyrene particle, and at the first adjustment step,
(a) reference data indicating a correspondence relation between a fluorescence agent parameter value correlated to a content of the fluorescence agent inside the surface of the polystyrene particle and the reference voltage value of the first signal corresponding to the fluorescence agent parameter value is used to specify the reference voltage value of the first signal corresponding to the fluorescence agent parameter value for the calibration particle used at the measurement step, and
(b) the first circuit is adjusted such that the voltage value of the first signal for the calibration particle reaches the reference voltage value specified based on the reference data.

2 . The method for calibrating the biological particle counter according to claim 1 , further comprising:
a second measurement step of generating a second signal for the calibration particle by the biological particle counter further including a second circuit and configured to count the biological particle based on the first signal and the second signal, the second circuit being configured to generate the second signal corresponding to scattered light from the biological particle in response to the irradiated light; and a second adjustment step of adjusting the second circuit such that a voltage value of the second signal for the calibration particle reaches a reference voltage value, wherein at the second adjustment step,
(c) reference data indicating a correspondence relation between the fluorescence agent parameter value and the reference voltage value of the second signal corresponding to the fluorescence agent parameter value is used to specify the reference voltage value of the second signal corresponding to the fluorescence agent parameter value for the calibration particle used at the measurement step, and
(d) the second circuit is adjusted such that the voltage value of the second signal for the calibration particle reaches the reference voltage value of the second signal in the reference data.

3 . The method for calibrating the biological particle counter according to claim 1 , wherein
the reference data corresponding to a particle size of the calibration particle is selected and used from the reference data corresponding to plural particle sizes.

4 . The method for calibrating the biological particle counter according to claim 1 , wherein
at least after the first adjustment step, the biological particle counter counts the calibration particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles or the calibration particle and the polystyrene particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles and a predetermined number of polystyrene particles, and a counting efficiency of the biological particle counter is specified based on a counting result.

5 . A calibration device of a biological particle counter, comprising:
a measurement value obtainer configured to obtain a voltage value of a first signal for a calibration particle from the biological particle counter including a first circuit and configured to count a biological particle based on the first signal, the first circuit being configured to generate the first signal corresponding to fluorescence from the biological particle in response to irradiated light; and a circuit adjuster configured to adjust the first circuit such that the voltage value of the first signal obtained for the calibration particle reaches a reference voltage value, wherein the calibration particle is a particle obtained in such a manner that a fluorescence agent infiltrates into a surface of a polystyrene particle, and the circuit adjuster
(a) uses reference data indicating a correspondence relation between a fluorescence agent parameter value correlated to a content of the fluorescence agent inside the surface of the polystyrene particle and the reference voltage value of the first signal corresponding to the fluorescence agent parameter value, thereby specifying the reference voltage value of the first signal corresponding to the fluorescence agent parameter value for the calibration particle for which the voltage value of the first signal has been obtained by the measurement value obtainer, and
(b) adjusts the first circuit such that the voltage value of the first signal for the calibration particle reaches the reference voltage value specified based on the reference data.

6 . The method for calibrating the biological particle counter according to claim 2 , wherein
the reference data corresponding to a particle size of the calibration particle is selected and used from the reference data corresponding to plural particle sizes.

7 . The method for calibrating the biological particle counter according to claim 2 , wherein
at least after the first adjustment step, the biological particle counter counts the calibration particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles or the calibration particle and the polystyrene particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles and a predetermined number of polystyrene particles, and a counting efficiency of the biological particle counter is specified based on a counting result.

8 . The method for calibrating the biological particle counter according to claim 3 , wherein
at least after the first adjustment step, the biological particle counter counts the calibration particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles or the calibration particle and the polystyrene particle in liquid with concentration of a predetermined number containing a predetermined number of calibration particles and a predetermined number of polystyrene particles, and a counting efficiency of the biological particle counter is specified based on a counting result.

Assignees

• Rion Co

Inventors

• Sekimoto Kazuma
• Oohashi Yuki
• Sannomiya Takashi
• Nakajima Tsutomu
• Fukuda Miyuki
• Ueno Masaru
• Ueya Yuuichi

Classifications

• G01N21/64

  Fluorescence; Phosphorescence · CPC title

• G01N15/1012 Primary

  Calibrating particle analysers; References therefor · CPC title

• G01N21/278

  Constitution of standards · CPC title