Analysis device, determination method, and prediction method

An analysis device comprising:

• a container configured to hold a liquid to be analyzed;
• a light-emitting diode (LED) light source configured to irradiate the liquid in the container with light;
• a photodetector configured to detect light emitted from the liquid when the liquid is irradiated with light from the LED light source;
• and
• a data processor configured to predict a replacement time of the LED light source based on a correlation between a time required until a light amount of the light from the LED light source is stabilized after the LED light source is turned on and an energization time of the LED light source.

A determination method of determining a state of a light-emitting diode (LED) light source of an analysis device including a container configured to hold a liquid to be analyzed, the LED light source configured to irradiate the liquid in the container with light, and a photodetector configured to detect light emitted from the liquid when the liquid is irradiated with the light from the LED light source, the determination method comprising:

• turning on the LED light source;
• measuring a time required until a light amount of the light from the LED light source is stabilized after the LED light source is turned on;
• determining a state of the LED light source using the measured time;
• predicting a replacement time of the LED liqht source based on a correlation between the measured time and an energization time of the LED light source.

A prediction method of predicting a replacement time of a light-emitting diode (LED) light source of an analysis device including a container configured to hold a liquid to be analyzed, the LED light source configured to irradiate the liquid in the container with light, and a photodetector configured to detect light emitted from the liquid when the liquid is irradiated with the light from the LED light source, the prediction method comprising:

• turning on the LED light source;
• measuring a time required until a light amount of the light from the LED light source is stabilized after the LED light source is turned on;
• and
• predicting a replacement time of the LED light source based on a correlation between the measured time and an energization time of the LED light source.