Abstract: A supercritical fluid apparatus includes a solvent supplier that supplies a solvent, a pressure control device provided in a flow path for a solvent supplied by the solvent supplier, and a controller that controls the pressure control device. The controller includes a first controller that increases a pressure in the flow path, puts the solvent in a supercritical fluid state and maintains an environment for execution of a predetermined process by controlling the pressure control device, and a second controller that sets an intermediate target value for a pressure in the flow path and controls a pressure in the flow path in order to get the pressure to reach the intermediate target value, when ending the environment for execution of a predetermined process.

Abstract: A preparative chromatograph system includes a sample injector (10) that injects a sample into a separation flow path (8) through which a mobile phase flows, a separation column (12) that is provided on the separation flow path (8) and is to separate a sample injected into the separation flow path (8) into components, a detector (14) that is provided at a position farther downstream than the separation column (12) on the separation flow path (8) and is to detect sample components obtained by separation in the separation column (12), a collector (18, 18?) having a plurality of collection containers (22) for collecting part of an eluate eluted from the separation column (12) and a switch mechanism (20, 30, 32) configured to be capable of selectively connecting a downstream end of the separation flow path (8) to any one of the collection containers (22), a collection setter (26) configured to set a portion, to be collected in each of the collection containers (22), of an eluate eluted from the separation column (

Abstract: A supercritical fluid separation apparatus performs feedback control of output of a heater so that a separation part temperature becomes a set temperature, based on both output of a first temperature sensor that measures a heating block temperature and output of a second temperature sensor that measures the separation part temperature. When a difference between the separation part temperature and the set temperature is large (equal to or more than a predetermined value), output of the heater is adjusted based on the heating block temperature. When a difference between the separation part temperature and the set temperature becomes small (less than a predetermined value), the output of the heater is adjusted based on the difference.

Abstract: A pressure control valve is provided with a pressure control block. The pressure control block has a pressure control block having an opening portion provided on one outer surface, a pressure control surface provided as a plane at a bottom portion of the opening portion, and two internal channels having openings at the respective end portions of the pressure control surface. A sheet-like valve body having elasticity and arranged so as to cover the pressure control surface is provided in the opening portion of the pressure control block. A valve body driving portion is provided on a side opposite to the pressure control surface with the valve body interposed therebetween that adjusts an amount of a gap between the valve body and the pressure control surface by pressing the valve body in a direction perpendicular to the pressure control surface. The pressure control surface has higher hardness than a hard material.

Abstract: A back pressure valve configured to switch between a pressurized state and a released state open to an atmosphere is used as a back pressure valve in a supercritical fluid chromatograph. Switching from a state of supercritical fluid chromatography analysis to liquid chromatography is performed by stopping a pump that supplies a supercritical fluid, continuously operating a pump that supplies a solvent used as a modifier, and bringing the back pressure valve into the released state.

Abstract: A pressure control valve is provided with a pressure control block. The pressure control block has a pressure control block having an opening portion provided on one outer surface, a pressure control surface provided as a plane at a bottom portion of the opening portion, and two internal channels having openings at the respective end portions of the pressure control surface. A sheet-like valve body having elasticity and arranged so as to cover the pressure control surface is provided in the opening portion of the pressure control block. A valve body driving portion is provided on a side opposite to the pressure control surface with the valve body interposed therebetween that adjusts an amount of a gap between the valve body and the pressure control surface by pressing the valve body in a direction perpendicular to the pressure control surface. The pressure control surface has higher hardness than a hard material.

Abstract: When a solid product of a target component is obtained by heating a container in which a solution containing a target component is housed with a heater and evaporating the solvent in the solution, the amount of heating by the heater is controlled based on the detection results of the temperature of the container detected by a temperature detection part so that the temperature of the container approaches a target temperature. At least one of a starting timing T2 and an ending timing T4 is then discriminated based on the amount of heating by the heater. Since the amount of heating by the heater varies while being sensitively affected by the vaporization heat generated when the solvent evaporates, the starting timing T2 or the ending timing T4 can be accurately discriminated by using the amount of heating by the heater as a discrimination criterion.

Abstract: When a solid product of a target component is obtained by heating a container in which a solution containing a target component is housed with a heater and evaporating the solvent in the solution, the amount of heating by the heater is controlled based on the detection results of the temperature of the container detected by a temperature detection part so that the temperature of the container approaches a target temperature. At least one of a starting timing T2 and an ending timing T4 is then discriminated based on the amount of heating by the heater. Since the amount of heating by the heater varies while being sensitively affected by the vaporization heat generated when the solvent evaporates, the starting timing T2 or the ending timing T4 can be accurately discriminated by using the amount of heating by the heater as a discrimination criterion.

Abstract: A photodiode array detector used for detecting light which has undergone wavelength separation by a spectroscopic element, the photodiode array detector including: a light receiving element array wherein, taking a plurality of light receiving elements which detect light of the same wavelength range as one unit, a plurality of such units are arrayed in the direction of dispersion of said wavelength; and a charge accumulation time setting unit which sets different charge accumulation times for the plurality of light receiving elements within the one unit.

Abstract: A stray light ratio computation unit computes the stray light ratio at a specified wavelength based on the quantity of light at the specified wavelength computed by light quantity computation unit in a state where there is no sample having absorption in the light path and the quantity of light at the specified wavelength computed by light quantity computation unit when the light is transmitted through a sample having absorption at the specified wavelength. Stray light quantity computation unit computes the quantity of stray light at each wavelength through computations using the stray light ratio at the specified wavelength and different unique values for each wavelength (for example, different coefficients for each wavelength, stored in coefficient storage unit).

Abstract: A back pressure valve configured to switch between a pressurized state and a released state open to an atmosphere is used as a back pressure valve in a supercritical fluid chromatograph. Switching from a state of supercritical fluid chromatography analysis to liquid chromatography is performed by stopping a pump that supplies a supercritical fluid, continuously operating a pump that supplies a solvent used as a modifier, and bringing the back pressure valve into the released state.

Abstract: A photodiode array detector used for detecting light which has undergone wavelength separation by a spectroscopic element, the photodiode array detector including: a light receiving element array wherein, taking a plurality of light receiving elements which detect light of the same wavelength range as one unit, a plurality of such units are arrayed in the direction of dispersion of said wavelength; and a charge accumulation time setting unit which sets different charge accumulation times for the plurality of light receiving elements within the one unit.

Abstract: A stray light ratio computation unit computes the stray light ratio at a specified wavelength based on the quantity of light at the specified wavelength computed by light quantity computation unit in a state where there is no sample having absorption in the light path and the quantity of light at the specified wavelength computed by light quantity computation unit when the light is transmitted through a sample having absorption at the specified wavelength. Stray light quantity computation unit computes the quantity of stray light at each wavelength through computations using the stray light ratio at the specified wavelength and different unique values for each wavelength (for example, different coefficients for each wavelength, stored in coefficient storage unit).

Abstract: Provided is a spectrophotometer capable of further reducing a change in temperature of a spectroscopic unit that houses a spectroscopic element, a sample, and the like therein, compared with conventional spectrophotometers. A spectrophotometer 1 includes: a light source chamber 10; a spectroscopic chamber 20 separated from the light source chamber 10 with a heat insulating section located therebetween, the spectroscopic chamber 20 including at least a spectroscopic element 24, a sample chamber 22, and a detector 25; a temperature measurer 40 measuring a temperature inside of the spectroscopic chamber 20; a temperature regulator 50 heating and/or cooling the inside of the spectroscopic chamber 20; and a controller 31 acquiring temperature information from the temperature measurer 40 and controlling the temperature regulator 50 to operate so as to keep the inside of the spectroscopic chamber 20 at a predetermined preset temperature.

Abstract: Analysis system including a central control section for generally controlling the analysis that sends a command to perform a pre-injection operation, to an automatic sampler together with information designating a sample to be selected, such as an identification number, and simultaneously sends a command to perform an operation of measuring a dark current in a photodiode array (PDA) detector, to a multi-channel spectrophotometer. Thus, the automatic sampler performs the pre-injection operation, such as an operation of moving a needle to a position of a designated vial container to suck a sample, and the spectrophotometer performs the dark-current measurement operation during a time period of the pre-injection operation. After the sample is actually introduced into the column, in response to a command to perform a normal measurement operation, an operation of acquiring absorption data of an eluate from the column is started without performing the dark-current measurement operation.

Abstract: Analysis system including a central control section for generally controlling the analysis that sends a command to perform a pre-injection operation, to an automatic sampler together with information designating a sample to be selected, such as an identification number, and simultaneously sends a command to perform an operation of measuring a dark current in a photodiode array (PDA) detector, to a multi-channel spectrophotometer. Thus, the automatic sampler performs the pre-injection operation, such as an operation of moving a needle to a position of a designated vial container to suck a sample, and the spectrophotometer performs the dark-current measurement operation during a time period of the pre-injection operation. After the sample is actually introduced into the column, in response to a command to perform a normal measurement operation, an operation of acquiring absorption data of an eluate from the column is started without performing the dark-current measurement operation.