958 results about "Sample chamber" patented technology

The invention relates to the technical field of superconducting magnet cooling, and discloses a superconducting magnet conduction cooling type low-temperature device which comprises a vacuum cavity, a refrigerating machine assembly is installed on the vacuum cavity, a liquid helium tank is installed at the refrigerating end of the refrigerating machine assembly, and an annular superconducting magnet is installed in the vacuum cavity. A heat conducting plate is mounted between the superconducting magnet and the refrigerating end of the refrigerating machine assembly; the sample chamber is arranged in the vacuum chamber, the sample chamber extends to the annular center of the superconducting magnet, a refrigerant pipe is communicated between the liquid helium tank and the sample chamber, a sample rod assembly is installed in the sample chamber, and one end, extending into the sample chamber, of the sample rod assembly is suitable for installing a sample body; a helium discharge pipe is communicated between the helium buffer tank and the liquid helium tank, and a discharge pipe is communicated between the sample chamber and the helium discharge pipe. The sample body works in the sample chamber and is soaked by liquid helium, so that the sample body works in a low-temperature environment all the time, and the stable low-temperature environment is maintained for the sample body for a long time.

The invention provides a device for testing an analyte in a liquid sample, and the device includes: a sample chamber for accommodating a sample collector; a detection chamber with a bottom, where a testing element is provided in the detection chamber and used for testing an analyte in a liquid chamber; and a connecting chamber, where the sample chamber is connected with the detection chamber through the connecting chamber, a liquid is accommodated in the sample chamber, and a level of the liquid in the sample chamber is higher than a bottom of the detection chamber.

The invention provides a laser spectrum online analyzer, and relates to the field of mineral processing. The laser spectrum online analyzer comprises a control analysis unit, a first sample chamber, a second sample chamber, a spectrum unit and a laser unit, the first sample chamber is used for accommodating a tested sample; the second sample chamber is used for accommodating a to-be-detected sample; the spectrum unit comprises a spectrograph, a first light receiving probe and a second light receiving probe; the laser unit comprises a laser light source, a reflector, a first focusing lens and a second focusing lens. The control analysis unit compares the current spectral intensity of the detected sample with the spectral intensity of the detected sample which is measured in advance, so that the change amplitude of the spectral intensity can be obtained, the spectral intensity is calibrated, and long-term on-site stable operation can be realized. In addition, the laser spectrum analyzer can also perform self-calibration on spectral line drift.

The invention discloses tea polyphenol component detection equipment for jasmine tea and a detection method thereof. The tea polyphenol component detection equipment comprises a spectrophotometer host, and the lower end of the spectrophotometer host is fixedly connected with a bottom support bin. Through the arrangement of the grinding box and the crushing knife rest, in the use process, jasmine tea needing to be detected is placed in the grinding box, then the pressing frame is assembled, through the pressing frame and second filter cloth, the movable space of the jasmine tea is limited, the jasmine tea is made to be close to the crushing knife rest, and therefore the crushing speed is increased; a solvent is placed in the grinding box, separation of tea polyphenol is accelerated through rotation of the crushing knife rest, meanwhile, sufficient extraction of the tea polyphenol can be guaranteed, the solution is directly filtered through the second filter cloth, the solution is taken out through the suction pipe and placed in the cuvette, then the cuvette is placed in the sample chamber, detection can be conducted, overall use is simple, and the detection efficiency is high. The device can directly measure on site, integrates components required by detection into a whole, and is convenient to carry.

An embodiment provides a method for stirring a sample in a cell, including: providing a cell comprising a sample chamber; placing a boron-doped diamond electrode on an inner surface of the sample chamber, placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the boron-doped diamond electrode; and wherein the stir bar can be operated to rotate within the sample chamber upon the boron-doped diamond electrode. Other aspects are described and claimed.

The invention relates to the technical field of metal material sample preparation, in particular to a preparation method for extracting carbon replica of steel for a high-carbon wire rod. The method specifically comprises the following steps: S1, preparing a sample; s2, immersing the sample into a nitric acid alcohol solution; s3, placing the sample in a sample chamber of a high-vacuum coating instrument, evaporating a carbon film with the thickness of 10-20 nm on the surface of the sample, and taking out the sample after vacuum is relieved; s4, performing electrolytic film removal by adopting an electrolytic polishing corrosion instrument; s5, after the carbon film falls off, the nitric acid alcohol on the carbon film is cleaned until the absolute ethyl alcohol in the weighing bottle is colorless; s6, the carbon film is transferred into deionized water, after the carbon film is fully unfolded, the carbon film is fished up through a transmission electron microscope and a copper net and placed on filter paper, and the carbon film is tightly attached to the copper net; and S7, baking the carbon film sample adhered to the copper mesh for 30-60 seconds, and placing the dried sample under an electron microscope for observation to complete the preparation of the steel extraction carbon replica sample for the high-carbon wire rod. The method has the advantages of high demolding speed, complete and firm carbon film form, simple configuration and low cost.

The invention belongs to the technical field of transformer equipment, and particularly relates to an automatic sampling device and method for transformer oil and gas. The device comprises a control box and a sampling sealing box, wherein a display screen, a keyboard and a code scanning module are arranged at the front part of a box body of the control box; the sampling sealing box comprises a sampling sealing box cover and a sampling sealing box body, a sampling bag support is arranged in the sampling sealing box body, the sampling bag is arranged on the sampling bag support, and a two-way valve is arranged at the top of the sampling bag; a sampling chamber air outlet pipeline, a sampling chamber air inlet pipeline, a third pipeline and a fourth pipeline are arranged on one side, connected with the sealing box, of the control box; the third pipeline and the fourth pipeline are respectively connected with the two-way valve; a first vacuum pump gas inlet pipeline, a second vacuum pump gas outlet pipeline, a waste liquid tank pipeline, a transformer oil sample pipeline and a transformer gas sample pipeline are arranged at the rear part of the control box. According to the invention, the convenience, safety and reliability of transformer oil and gas sampling are comprehensively improved, and powerful technical support is provided for safe and stable operation of a power system.

The invention relates to the technical field of adsorption instruments, particularly provides a gravimetric adsorption instrument based on a magnetic suspension balance and a control method of the gravimetric adsorption instrument, and aims to solve the problem that a microbalance of an existing gravimetric adsorption instrument has many restrictions on the application range of the adsorption instrument. The gravimetric method adsorption instrument comprises a magnetic suspension system and a sample chamber, the magnetic suspension system comprises a first part and a second part which are arranged outside and inside the sample chamber, the first part comprises a microbalance and a first magnetic device, and the first magnetic device is an electromagnetic device and is connected with the microbalance of the magnetic suspension system; the second part comprises a second magnetic device, the second magnetic device is a permanent magnet and is connected with a sample in the sample chamber, and magnetic force generated after the first magnetic device is electrified can attract the second magnetic device and the sample and weigh the second magnetic device and the sample through the microbalance. The first part of the magnetic suspension system is arranged outside the sample chamber, so that the first part is prevented from being in contact with the atmosphere in the sample chamber, and the existing problems are solved.

Downhole tools for measuring properties of a fluid include a sample chamber configured to receive the fluid, a field responsive material (“FRM”) arranged with an interface between the field responsive material and the fluid under test in the sample chamber. The field responsive material is tunable to change an acoustic impedance of the field responsive material in response to application of an applied field. A field generator is arranged in relation to the field responsive material, the field generator configured to generate and apply a field to the field responsive material. An acoustic transducer is arranged to direct acoustic energy into and through the field responsive material toward the interface between the field responsive material and the fluid and configured to detect reflections of acoustic energy that reflect from the interface.

The invention relates to the technical field of scanning electron microscopes, in particular to a scanning electron microscope which comprises a mounting frame, an electron microscope body, a vacuumizing mechanism, an adapter, a damping mechanism and a vacuum tube structure, the electron microscope body comprises a lens cone and a sample bin, and the vacuumizing mechanism is used for synchronously vacuumizing the lens cone and the sample bin; the damping mechanism is arranged between the mounting rack and the electron microscope main body; the adapter comprises an adapter tube, a first joint and a second joint, and the first joint and the second joint are arranged on the two sides of the adapter tube; the vacuum tube structure comprises a first flexible tube, a first rigid tube, a second flexible tube and a second rigid tube, and the first flexible tube and the second flexible tube are symmetrically arranged. Due to the fact that the flexible pipes are connected with the vacuumizing mechanism and the rigid pipe is connected with the electron microscope body, the symmetrical flexible pipes can balance pulling force in the vacuumizing process, the influence of the pulling force on the electron microscope body is reduced, the influence on the image quality is reduced, and the detection accuracy of the scanning electron microscope and the definition of images are effectively guaranteed.

A holder holds a battery which is subjected to X-ray analysis. The battery includes a positive electrode and a negative electrode. A sample chamber for disposing the battery therein is formed inside the holder. The holder includes a body, a beryllium plate, a first resin member, a conductive member, a positive electrode terminal, and a negative electrode terminal. An upper surface of the body is formed with a window. The beryllium plate is arranged in the window. The first resin member is provided on a surface of the beryllium plate. The conductive member is provided between the positive electrode and the first resin member so as to be in contact with the positive electrode of the battery. The positive electrode terminal is electrically connected to the conductive member. The negative electrode terminal is electrically connected to the negative electrode.

The present invention improves analysis accuracy and shortens measurement time by preventing a decrease in the intensity of fluorescent X-rays to be detected. A fluorescent X-ray analysis device having a sample chamber in which a sample is disposed and an irradiation chamber separated from the sample chamber by using a partition plate, the fluorescent X-ray analysis device having: an X-ray source that is disposed in the irradiation chamber and that irradiates X-rays obliquely toward an opening provided on a partition wall between the sample chamber and the irradiation chamber; a window frame member that is formed of a material that transmits the X-rays, that holds a partition film constituting a part of the partition, and that is disposed in an opening provided in the partition wall; and a film support member that has a long hole through which the X-rays pass, is disposed adjacent to the separator film on the irradiation chamber side, and supports the separator film from the irradiation chamber side. The film support member is disposed such that the long hole is parallel to an optical axis of the X-ray in a plan view from the sample chamber side toward the irradiation chamber side.

The invention provides an argon ion beam scanning electron microscope double-beam system and an in-situ sample analysis method, an electron optical lens barrel of the system generates a high-energy electron beam for scanning the surface of a sample for imaging; the ion optical lens cone generates a high-energy argon ion beam for sample surface polishing; the sample chamber is used for accommodating samples and providing a vacuum environment; the sample table is used for accurately controlling the position and angle of a sample; and the detector is used for collecting signals generated by interaction of the electron beam and the sample for imaging analysis. According to the invention, a sample transfer step is eliminated, so that the sample preparation and analysis efficiency is greatly improved; a millimeter-scale large-size sample can be treated, and a sample with a flat and smooth surface can be obtained; sample polishing and imaging are carried out in the same vacuum environment, so that sample pollution is reduced to the greatest extent, and the accuracy of an analysis result is improved; by combining argon ion beam polishing and scanning electron microscope imaging technologies, efficient, high-precision and in-situ analysis of the sample is realized, so that more comprehensive and more accurate microstructure information is obtained.

The invention discloses a honey adulteration detection method, which belongs to the technical field of food detection, and comprises the following steps: collecting an absorbance spectrum of a honey sample by using a near infrared spectrometer; extracting characteristic absorbance values A < lambda > 1 and A < lambda > 2 at a 1450 nm water molecule absorption peak and a 1490 nm saccharide molecule absorption peak; the ratio R is equal to A lambda 1 / A lambda 2; and comparing the R with a threshold range of 0.85-1.15 of pure honey so as to judge whether the honey is true or false. The portable device comprises a sample bin, a near infrared spectrum module, a control unit and a human-computer interaction interface, wherein a rotatable sample table is arranged in the sample bin to accommodate a plurality of disposable sample cups. The method abandons a complex black box model, adopts a characteristic wavelength ratio method with clear physical significance, has the outstanding advantages of simple principle, rapid detection (less than 30 seconds), high accuracy, low cost, simplicity and convenience in operation and the like, perfectly solves the problems of expensive equipment, long time consumption, limited identification capability and dependence on professionals in the prior art, and has a wide application prospect. The method is especially suitable for market on-site rapid screening.

A fluid sampling tool is locatable in a borehole for sampling formation fluid including a chemically active component from a formation. The fluid sampling tool includes a sample chamber including a fluid inlet and an interior, wherein the interior includes a substrate and a reagent attached to the substrate, and wherein the reagent is configured to react with the chemically active component of the formation fluid to form a reaction product. The fluid sampling tool also includes a pump operable to pump a sample of the formation fluid in from the formation through the probe and into the sample chamber. A formation fluid sample flows into the sample chamber and a chemically active component of the formation fluid sample reacts with the reagent to form the reaction product from which a presence and concentration of the chemically active component in the formation fluid sample is determinable

The embodiment of the invention provides a radioactive aerosol continuous monitoring device. The radioactive aerosol continuous monitoring device comprises a sampling chamber (1), sampling filter paper (3) and a measuring chamber (2), the sampling chamber (1) is arranged in front of the measuring chamber (2) in the horizontal direction; the sampling chamber (1) comprises a vertically arranged air sampling inlet pipe (13) and a centripetal particle size separation sampler (11) which is arranged below the air sampling inlet pipe (13) and is used for separating radioactive aerosol according to different particle sizes; and the sampling filter paper (3) is arranged below the centripetal particle size separation sampler (11) and is used for receiving the radioactive aerosol separated by the centripetal particle size separation sampler (11). The radioactive aerosol is separated through the centripetal particle size separation sampler, the problem of particle slippage does not exist, the collection efficiency of radioactive particles can be effectively improved, the detection sensitivity and accuracy of the radioactive aerosol are improved, and continuous monitoring of the radioactive aerosol in the air is achieved.

The invention discloses an optical instrument based on multifunctional fluorescence chemiluminescence imaging, and belongs to the technical field of optical instruments. An optical instrument based on multifunctional fluorescence chemiluminescence imaging comprises a fluorescence chemiluminescence imaging instrument, a box door is movably installed on the lower portion of the fluorescence chemiluminescence imaging instrument, a packaging plate is movably installed in the box door, and a sealing gasket is fixedly connected to the side face of the packaging plate. The packaging plate is pushed by the telescopic spring, so that the sealing gasket on the side face of the packaging plate and the sealing frame are sealed, the sealing effect of the sample chamber is improved, when the box door is opened, the sample table slides out synchronously, the sample table can stretch out conveniently and automatically, when the box door is closed, the sample table shrinks synchronously, and convenience in sample placement is improved; the photoelectric detector detects that the external light source and the buzzer begin to buzz, and when the box door is closed, the sample box has no external light source, and the buzzer stops buzzing, so that the light source in the sample chamber is monitored, and the imaging effect is prevented from being influenced.

The invention relates to a of photoacoustic gas sensing apparatus (100) for sensing a gas sample in a sample chamber (310). The apparatus (100) comprises: a reference light source (220), configured for emitting a reference light beam (221) when driven by a reference power source (225), wherein the reference light beam (221) is configured for passing a reference chamber (320) filled with a reference gas and for reaching a detector chamber (400) filled with a detector gas; a sample light source (210), configured for emitting a sample light beam (211) when driven by a sample power source (215), wherein the sample light beam (211) is configured for passing the sample chamber (310) filled with the gas sample and for reaching the detector chamber (400); a microphone (500), configured for sensing pressure changes in the detector chamber (400), the pressure changes being a function of the gas sample; and a control unit (600), configured for receiving an electric output (560), caused by the pressure changes, from the microphone (500), and for controlling, depending on the electric output (560), an amplitude of the reference power source (225) and / or of the sample power source (215).

An apparatus includes at least one processor and at least one memory storing instructions. The instructions, when executed by the processor(s), cause the apparatus to: determine that a sample chamber contains a first type of biological sample, where the sample chamber includes a bottom wall through which an imaging device can image the sample chamber; provide images by controlling the imaging device to, for each depth of a plurality of depths: focus on the respective depth, and capture one or more images containing the respective depth in the sample chamber; counting one or more constituents in the images to determine one or more depth distributions of the constituent(s) across the plurality of depths, where the constituent(s) include a constituent of interest; and quantifying the constituent of interest in the biological sample based on the one or more depth distributions and based on one or more depth distribution curves.

The invention provides a dynamic heat-water-force coupling test device and test method, and relates to the technical field of rock performance test.The device comprises a sample chamber for containing a rock sample; the heat loading assembly, the pore water pressure loading assembly and the force loading assembly are integrally arranged; the heat loading assembly comprises a heating element and a cooling element so as to simulate an environment in a wide temperature range or under a freezing and thawing cycle condition; the pore water pressure loading assembly is communicated with the rock sample to establish pore water seepage loading; an axial pressure loading element of the force loading assembly applies dynamic axial pressure to the rock sample, and a confining pressure loading element of the force loading assembly applies dynamic confining pressure to the rock sample; the sealing sleeve wraps the rock sample so as to isolate the confining pressure medium from the liquid medium. According to the device provided by the invention, three dynamic loads including the dynamic temperature, the dynamic pore water pressure and the dynamic mechanical stress can be synchronously applied and accurately controlled in a single device, so that a rock sample is subjected to a mechanical test in a vivid dynamic multi-field coupling environment.

A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.

The invention discloses a spectral analysis device and method for gas Raman scattering of a hollow-core optical fiber, and belongs to the technical field of gas analysis sensing. The spectrum analysis device comprises a laser, a light beam coupling device, a hollow-core optical fiber gas sample chamber, a collecting device and a spectrograph which are sequentially arranged along a light path, the light beam coupling device is used for coupling excitation laser generated by the laser into the hollow-core optical fiber gas sample chamber; to-be-detected gas flows in the hollow-core optical fiber gas sample chamber, excitation laser is conducted, and a transmission light beam containing the excitation laser and Raman scattering light is output; the collecting device is used for separating excitation laser in the transmission light beam and outputting a light beam only containing Raman scattering; a small round hole is formed in an inlet of the spectrograph, spatial filtering is carried out, and the luminous flux lost when a light beam enters the spectrograph is reduced; and the spectrometer receives the Raman scattering to obtain the Raman spectrum of the gas to be detected. The luminous flux lost when the light enters the spectrograph is reduced, the light beam collection efficiency is improved, and the signal-to-noise ratio and the analysis sensitivity are improved.

The invention belongs to the technical field of photovoltaic measurement, and particularly relates to a photovoltaic cell performance in-situ high-throughput characterization device and method. The device comprises a control unit, a J-V testing system, a microscopic steady-state photoluminescence / transient fluorescence imaging system, a multi-external-field control system and a high-throughput sample cavity, the high-throughput sample cavity is fixedly arranged on a two-dimensional translation table, and the two-dimensional translation table is fixedly arranged on a large-stroke linear displacement table; the high-throughput sample cavity comprises a sample chamber, a plurality of sample accommodating positions are arranged in the sample chamber, a quartz glass cover used for sealing the sample chamber is arranged above the sample chamber, and an air inlet used for adjusting humidity and atmosphere is formed in the cavity wall of the high-throughput sample cavity; according to the invention, various parameters of the photovoltaic cell can be measured, the measurement efficiency is high, and the device is simple in structure.

The embodiment of the invention provides a micro-fluidic detection chip, a detection method and detection equipment, and relates to the technical field of micro-fluidic chips, the micro-fluidic detection chip comprises a micro-fluidic layer which comprises a substrate, a top sealing layer and a bottom sealing layer, the top sealing layer and the bottom sealing layer are located on the two sides of the substrate, the substrate is provided with a sample cavity, a solid reagent cavity, a plurality of liquid bag buffer cavities, a plurality of liquid reagent cavities, a reagent buffer cavity and a reaction cavity, the sample cavity is communicated with the solid reagent cavity, the plurality of liquid bag buffer cavities are independently arranged, and the plurality of liquid reagent cavities are sequentially arranged at intervals; each liquid bag buffering cavity is internally provided with the corresponding puncturing structure; the liquid bag layer is arranged on one side of the base plate, the liquid bag layer comprises a plurality of liquid bag units which are arranged at intervals and are mutually independent, each liquid bag unit is provided with a liquid bag cavity, and the liquid bag cavities of the liquid bag units are arranged opposite to the at least one puncturing structure. According to the embodiment of the invention, the detection steps can be effectively simplified, and pollution caused by mutual mixing of different reagents is prevented.

The invention discloses a transmission-type second harmonic characteristic testing device. A light source module (1) generates pumping laser; the light path adjusting module (2) is used for adjusting and controlling the power and the polarization state of the pumping laser generated by the light source module (1); a to-be-tested sample (14) is fixed in the transmission-type sample chamber (3), and the pumping laser is focused on the to-be-tested sample (14) and generates a second harmonic signal; the detection module (4) extracts and receives the second harmonic signal and detects the strength of the second harmonic signal; and the data processing device (5) processes the intensity of the received second harmonic signal, records the change of the intensity of the second harmonic signal along with time, performs average processing, and finally displays test data and results. The invention further discloses a transmission-type second harmonic characteristic testing method. The device is simple and practical, can test the optical parameters such as the second harmonic spectrum and the light intensity of the two-dimensional material, improves the test efficiency, and is convenient to popularize and apply.

The invention discloses a fluorescent probe device with high-sensitivity detection in the field of biological fluorescence detection.The fluorescent probe device comprises a micro-fluidic chip, a closed micro-channel allowing a sample to flow is arranged in the micro-fluidic chip, and the micro-channel comprises a reaction bin, a sample bin and an enzyme liquid bin; the sample bin and the enzyme liquid bin are symmetrically distributed on the two sides of the reaction bin, delay channels of zigzag structures are communicated between the sample bin and the reaction bin and between the enzyme liquid bin and the reaction bin, the sample bin and the enzyme liquid bin are provided with a first filling port and a second filling port respectively, the reaction bin is provided with vent holes communicated with the outside, and a plurality of aptamer fluorescent probes are fixed to the bottom wall of the reaction bin. A nucleic acid aptamer fluorescent probe is fixed in the micro-fluidic chip, a CRISPR-Cas12a enzyme digestion system is added, a plurality of signal fragments are released in the process that a single aptamer is combined with antibiotics, signal cascade amplification of CRISPR-Cas12a non-specific enzyme digestion activation is achieved, and the micro-fluidic chip has the function of detecting existence of drug-resistant genes. And the possibility of occurrence of false negative detection results is reduced as much as possible.

The utility model relates to the technical field of soil sampling equipment, and provides a soft soil sampling barrel. The soft soil sampling barrel comprises a sampling barrel body, a sampling cavity is formed in the sampling barrel body, a sampling opening communicated with the sampling cavity is formed in the first end of the sampling barrel body, and a connecting hole is formed in the second end of the sampling barrel body; the sampling piece is detachably connected to the inner wall surface of the sampling cavity, a sampling chamber and an opening communicated with the sampling chamber are formed in the sampling piece, and the opening faces the sampling opening; the piston assembly is arranged in the connecting hole in a penetrating mode, the first end of the piston assembly is located in the sampling cavity and connected with the inner wall face of the sampling cavity in a sliding and sealing mode, the first end of the piston assembly can move between the sampling piece and the second end of the sampling barrel body, and the second end of the piston assembly protrudes out of the sampling barrel body. According to the soft soil sampling barrel provided by the embodiment of the invention, the situation that soil falls off and slides out is effectively avoided, and the success rate of soil sampling is improved.

The invention provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method, and belongs to the technical field of hydrogen storage material performance detection. In the device, a hydrogen source and a carbon monoxide gas source in a gas mixed supply system respectively pass through a pressure reducing valve and a mass flow controller corresponding to the hydrogen source and the carbon monoxide gas source, and then pass through a first valve, a deoxidizing agent device and a dehydrating agent device to be connected with a main pipeline; the argon source is connected into the main pipeline through the pressure reducing valve and the second valve and used for calibrating the volume; the large gas supply tank is connected into the main pipeline through a third valve, and the small gas supply tank is connected into the main pipeline through a quick connector and a fourth valve; the vacuum pump is connected to the main pipeline through a fifth valve; a hydrogen storage alloy is placed in the sample chamber which is connected with the main pipeline through a sixth valve; a temperature control device is arranged outside the sample chamber; and the monitoring and control system is used for detecting and recording the gas pressure change and controlling and monitoring the temperature of the sample chamber. The device can accurately evaluate the hydrogen storage performance change of the hydrogen storage alloy under different poisoning conditions.

Apparatus and methods are described including preparing a blood sample for analysis by depositing the blood sample within a sample chamber (52), and placing the sample chamber, with the blood sample deposited therein, within a microscopy unit (24). One or more microscopic images of the sample chamber (52) with the blood sample deposited therein are acquired, using a microscope of the microscopy unit. Based upon the one or more images, an amount of one or more cell types within the sample chamber that had already settled within the sample chamber, prior to acquisition of the one or more microscopic images is determined. A characteristic of the sample is determined, at least partially in response thereto. Other applications are also described.

The invention discloses a powder sample preparation mold of a photoelectron spectrometer. The powder sample preparation mold comprises a sample groove and a base, the sample groove is made of a compressible material, has compressibility and is used for synchronously compressing and compacting the sample groove together with a sample; the base is a perforated plate with a plurality of holes, the holes are matched with the sample grooves in an embedded mode, the sample grooves are higher than the holes before compression, and the sample grooves are flush with the holes after compression. The sample preparation mold can be used for pressing powder samples in batches, the powder sample preparation process of the photoelectron spectrometer is simplified, the sample preparation time is shortened, the convenience of powder sample preparation can be effectively improved, sample pollution is avoided, and the sample preparation efficiency is greatly improved. Compared with a traditional mode of preparing a sample by using an adhesive tape, the sample preparation mold disclosed by the invention can be used for preventing glue on the adhesive tape from immersing into a powder sample to cause pollution, the sample can be recycled after a test is completed, the prepared sample does not need to be cut, powder cannot be generated to pollute a sample chamber, the exposed surface of the sample is relatively large and relatively flat, and the detection signal intensity is favorably improved.