Shimadzu Corporation

Takuya Yonekura

Masato Watanabe

Yugo Ishihara

Hiroyuki Togo

Shinji Tsuji

Atsushi Sakamoto

An optical part () including a measurement cell (), a light source part () that emits light to be emitted to the measurement cell (), a light receiving element (), and a shutter () that shields light to the light receiving element (), a storage part (), a controller (), and a calculator (). The optical part () includes a temperature control element () for adjusting a temperature of the optical part (), the controller () is configured to control the temperature control element () so that a temperature of the optical part () becomes a target temperature which is set in advance, and to execute, at least in a case where a measured value of the dark current at the target temperature is not stored in the storage part (), measurement of the dark current immediately after a transition from an unstable state to a stable state, the storage part () stores a measured value of the dark current acquired in the measurement, and the calculator is configured to continuously use a same measured value of the dark current in the calculation processing while the stable state of the temperature of the optical part continues.

Optical measurement device and liquid chromatograph system

A liquid chromatograph including a spectroscopic analysis unit () that performs spectroscopic analysis by irradiating a flow cell () through which an eluent eluted from a column () flows with light is provided with a cell information reading unit () that is provided in the spectroscopic analysis unit and accesses a storage device () attached to the flow cell to acquire cell information that is information unique to a type or an individual of the flow cell; a wavelength check control unit () that causes the spectroscopic analysis unit to execute wavelength check; a wavelength check information storage unit () in which a result of the wavelength check is stored in association with the cell information acquired at a time of executing the wavelength check; and a system check report creation unit () that creates a system check report in which the result of the wavelength check and the cell information acquired at the time of executing the wavelength check are described by referring to the wavelength check information storage unit. This makes it possible to sufficiently secure the reliability of the analysis result.

Liquid chromatograph including spectroscopic analysis units

A spectrophotometer () includes a sample placement unit () in which a sample to be analyzed is placed, a light source unit () including a plurality of light sources that irradiates the sample placed in the sample placement unit () with light, a detection unit () that detects light emitted from the sample (), a housing () that accommodates the sample placement unit (), the light source unit (), and the detection unit (), a storage unit () in which information of a temperature value predetermined for each combination of one or a plurality of light sources among the plurality of light sources is stored, a light source designation accepting unit () that accepts designation related to a combination of one or a plurality of light sources among the plurality of light sources, a target temperature setting unit () that reads a temperature value corresponding to the combination of light sources accepted by the light source designation accepting unit from the storage unit and sets the temperature to the target temperature, and a temperature adjusting unit () that maintains a temperature inside the housing at a target temperature.

Spectrophotometer

An absorbance detector includes a sample cell, a light source for irradiating the sample cell, a photo sensor, an optical system for guiding light emitted from the light source to the sample cell and guiding light that has been transmitted through the sample cell to the photo sensor, a reference signal acquirer configured to acquire a detection signal of the photo sensor when the sample solution is not flowing through the sample cell as a reference signal for each analysis of the sample, a calculator configured to find absorbance of the sample based on a measurement signal obtained by the photo sensor in the analysis and the reference signal acquired for the analysis when an analysis of the sample is carried out, and an analysis data storage configured to associate data of the absorbance found by the calculator and data of the reference signal to each other for storage.

Absorbance detector and liquid chromatograph

An absorbance detector for a chromatograph includes a light source, a flow cell that receives light generated by the light source, a photodetector that detects light transmitted through the flow cell, a light shield member that shields at least part of the light generated from the light source to the flow cell, a motor that rotates the light shield member to change the light shield member between a light-shielding state where the light shield member shields at least part of the light generated from the light source to the flow cell and a non-light-shielding state where the light shield member does not shield the light generated from the light source to the flow cell, and a reference position detector that rotates the motor and also acquires a change in amount of light received by the photodetector to detect a reference position of the light shield member in a rotation direction of the light shield member based on the acquired change in the amount of the received light.

Absorbance detector for chromatograph and reference position detection method

The device is provided with a lamp lighting unit configured to perform an operation for lighting a deuterium lamp by controlling a lamp drive unit and a heater drive unit, an abnormality determination unit configured to determine, in a prescribed sequence, whether or not a voltage or a current detected by a lamp voltage detection unit, a lamp current detection unit, a heater voltage detection unit, and a heater current detection unit is abnormal, and an abnormality cause identification unit configured to identify, in a case the voltage or the current is determined to be abnormal by the abnormality determination, the cause of the abnormality, based on the timing at which the abnormality determination unit determines that the voltage or the current is abnormal.

Device with deuterium lamp and liquid chromatograph

A spectroscopic detector includes a lamp house, a sample cell, an optical sensor, a heater, a cooling fan, a temperature sensor, and a control device. The heater heats the lamp house while being directly or indirectly in contact with the lamp house containing a light source. The cooling fan is for cooling the lamp house. The temperature sensor is for detecting a temperature of the lamp house. The control device is configured to control operations of the light source, the heater, and the cooling fan. The control device includes a temperature control part configured to maintain a temperature of the lamp house while the light source is lit at a set temperature by controlling at least output of the heater based on a detection signal of the temperature sensor.

Growing community of inventors

Kyoto, Japan

Takuya Yonekura