821 results about "Photometer" patented technology

The invention relates to the technical field of total phosphorus detection, in particular to a method for determining total phosphorus in water, which comprises the following steps: 1) digestion treatment: adding an oxidant into a water sample to be detected, and then performing microwave digestion treatment to obtain digested water; a molybdate reagent is added into the digested water, then an improved ascorbic acid solution is added, a chromogenic reaction is completed at the set temperature, and the improved ascorbic acid solution is obtained by mixing an ascorbic acid solution and sodium ethylene diamine tetracetate; measuring the concentration: measuring the absorbance value of the obtained color development product by using a spectrophotometer and a long-optical-path cuvette; and drawing a standard curve: using a phosphorus standard solution as a quality control sample, adding a plurality of calibration points in a low-concentration interval of 0.0-0.1 mg / L, carrying out colorimetric determination, and establishing quadratic equation fitting according to absorbance and concentration so as to determine the total phosphorus content of the water sample to be detected, and the method has the advantages of high sensitivity and good accuracy in total phosphorus testing.

The invention relates to the field of betacyanin content detection, and discloses a method for rapidly detecting betacyanin content based on spectrophotometry, which comprises the following steps: experimental operation: preparing samples into standard solutions with different concentrations, carrying out full-spectrum scanning on the standard solutions by using a spectrophotometer, and determining the content of betacyanin by using a spectrophotometer; recording absorbance values under different wavelengths to form a spectral data matrix; preprocessing: preprocessing the spectral data matrix to obtain basic data; first analysis: analyzing the basic data by adopting a multivariate correction technology so as to obtain first data; and second analysis: analyzing the basic data by adopting a spectral feature extraction and mode recognition technology. A complete detection process is formed from data acquisition, preprocessing and analysis of different technologies to final fusion and integration, each step provides better data or more accurate analysis results for subsequent steps, and rapid and accurate detection of the betacyanin content is jointly realized.

The invention relates to a method for efficiently and accurately measuring the content of a urease inhibitor in a stabilized fertilizer. The method comprises the following steps: preparing a sample solution; carrying out digestion treatment on the sample solution; carrying out chromogenic reaction; measuring the absorbance of the blue complex by using a 3cm cuvette under the wavelength of 710 nanometers by using a spectrophotometer; and calculating the content of the total effective components of the urease inhibitor in the sample according to a relational expression between the phosphorus content and the absorbance. According to the invention, accurate measurement of the content of the target component can be realized through chemical digestion, chromogenic reaction and photometric analysis, the measurement method is simple and reliable, the measurement method shows significant advantages in the aspect of urease inhibitor content measurement, and powerful technical support can be provided for quality control and performance evaluation of related products. Compared with the existing liquid chromatography, the method has the advantages that the cost advantage is obvious, the acquisition cost and the maintenance cost of a liquid chromatograph and matched equipment thereof can be saved, accurate determination can be carried out only by using a conventional detection appliance, and the method has good universality.

A self-calibrating hybrid spectrophotometer comprises a receptacle for receiving the cuvette, first and second optodes that are configured to permit light to enter the cuvette, third and fourth optodes that are configured to permit light to leave the cuvette, and a controller that is configured to control delivery of light to one of the first and second optodes. Light entering one of the first and second optodes is received at the third and fourth optodes after having interacted with the turbid sample along different paths having different lengths. Measurements made at the third and fourth optodes in response to having illuminated both the first and second source optodes provide two slopes of optical transmittance as a function of path length. The spectrophotometer uses these slopes to identify a slope that is indicative of the absorption coefficient and the reduced scattering coefficient of the sample.

The invention discloses an Airy beam attenuation compensation method based on a neutral density filter and an imaging system, and belongs to the technical field of microscopic imaging, the method comprises the following steps: shaping and filtering a light beam emitted by a light source through a shaping device, and then generating an Airy beam; light beams pass through a neutral density optical filter, and attenuation compensation of different degrees is achieved on the light beams at different positions on a light beam propagation transverse plane; enabling the light beam to pass through a scanning galvanometer to form a light sheet, enabling the light beam to enter from one side of the sample, and exciting the sample to generate a fluorescence signal; the sample is imaged, an imaging result is collected through a camera, and the light intensity change in the exciting light propagation process is analyzed; and measuring an attenuation coefficient by adopting a biological spectrophotometer, and determining parameters of the neutral density filter. According to the attenuation compensation method, the advantages of Airy beams are combined, and a new optical element (neutral density filter) is introduced to achieve the purpose of attenuation compensation.

A thickness of a film stack of a workpiece and a composition of the film stack is determined with an x-ray technique, spectroscopic ellipsometry (SE) and / or spectroscopic reflectometry (SR), and multiwavelength Raman spectroscopy. The measurements are combined to form combined measured data. The combining includes regressing the second measurements and the third measurements. The thickness of the film stack and the composition of the film stack is then determined using the combined measured data.

The invention discloses a ground photometer aerosol parameter inversion algorithm based on integrated machine learning. According to the method, a training data set for training an integrated machine learning model is obtained by adopting a forward radiation transmission simulation model, and the training data set is independent of an aerosol product of an existing algorithm and observation interfered by noise; the algorithm has good generalization ability and is excellent in performance after being used for real observation of a photometer, and inverted aerosol parameters have the ability of representing aerosol types; an aerosol inversion algorithm based on an integrated machine learning model is developed aiming at observation of a ground photometer, and the time for completing aerosol inversion for one time is at a millisecond level; the multi-band and multi-angle radiance observation can be utilized at the same time to invert aerosol parameters of multiple bands at a time; any prior hypothesis and smooth constraint are not needed during aerosol parameter inversion, inversion result loss caused by non-convergence of gradient descent in a numerical inversion algorithm is avoided to a certain extent, and waste of effective observation is reduced.

The invention discloses a method for detecting fluorine ions in a water body based on a smart phone, and belongs to the technical field of fluorine ion detection. According to the portable detection equipment based on the smart phone, laser emitted by the laser pen is divided into two beams through the beam splitter, then a to-be-detected liquid is compared with a sample with a fixed concentration, the smart phone is used for shooting a picture, and then the RGB value of an effective area is identified, so that the G ratio of the to-be-detected liquid to the sample with the fixed concentration is obtained; according to the method, a linear relation between fluorine ions with different concentrations and G ratios is constructed, high-sensitivity detection of F <-> is realized, compared with traditional fluorospectro photometer detection, the sensitivity is higher, the technical problem of test result deviation caused by instability of a rechargeable light source used in the field detection process in the prior art is solved, and the method is suitable for large-scale popularization and application. According to the invention, on-site detection of the water sample to be detected can be realized through the smart phone.

The utility model discloses a displacement sampling calibration mechanism of an aerosol photometer, which comprises a frame, an upper turntable and a lower turntable, the upper turntable is rotatably arranged in a detection chamber of the frame, and a first detection tube and a second detection tube are arranged on the upper turntable. The upper end of the first detection pipe and the upper end of the second detection pipe are located in the detection cavity, a lower rotating disc is rotationally installed on the portion, below the upper rotating disc, of the rack, the upper rotating disc and the lower rotating disc are fixedly connected into a whole through a center shaft, and the center shaft is driven by a rotating power device installed on the rack. A standard aerosol photometer and a to-be-calibrated aerosol photometer are fixedly mounted on the lower turntable; sampling ports of the standard aerosol photometer and the to-be-calibrated aerosol photometer are respectively communicated with the first detection pipe and the second detection pipe through pipelines; the mechanism can change the detection position so as to carry out multi-point detection, so that the detection result is more accurate, and the calibration accuracy is improved.

The invention provides a detection device for a density gradient centrifugal sample, and belongs to the technical field of detection devices. The device comprises a sample suction platform mechanism which is used for sucking layered samples to be detected in a centrifugal tube layer by layer and conveying the layered samples to a sample detection chamber of an optical detector mechanism; the optical detector mechanism is provided with a xenon lamp light source and a beam shrinking light path system and supports 200-1100 nm full-wavelength detection; and the automatic collecting platform mechanism is used for sub-packaging the samples detected by the optical detector mechanism. According to the invention, a separation system and a collection system are integrated into a continuous process, so that man-made interference is reduced, and the resolution ratio and efficiency are improved. The xenon lamp light source and the beam shrinking light path system are adopted, the detection precision and stability are improved based on the spectrophotometer principle, the detection wavelength can be freely selected, and the limitation of traditional dual wavelengths is broken through.

The invention discloses a method for detecting the purity of a phosphorus-containing flame retardant, and belongs to the technical field of flame retardant detection. The specific test method comprises the test steps of selecting a solvent, preparing a to-be-tested solution, determining the maximum absorption wavelength, determining absorbance, calculating the purity of a sample and the like, and analyzing and processing an experimental result. The solvent is filtered through a 600-mesh screen, the influence of impurities in the solvent on an experimental result is eliminated, and the scientificity of the experimental result is ensured by parallelly determining the average value recorded for three times; the testing method has the advantages of low cost, simplicity and convenience in operation, short detection period and the like, and can realize rapid detection of a plurality of samples based on multiple stations of an ultraviolet-spectrophotometer, so that the working efficiency is improved; meanwhile, the method for detecting the purity of the phosphorus-containing flame retardant provided by the invention can be used for comparing the quality of products from different manufacturers and the batch stability of the products at the same time, and is beneficial for enterprises to control the quality of the products.

A photometric process measurement arrangement and a photometric measurement method The invention refers to a photometric process measurement arrangement (10) comprising a photometric immersion probe (20) comprising a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising a separate wavelength-selective detection element (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70), The photometer control (80) comprises: An impulse signal integrator (819, 829, 839) for integrating the electric impulses having the impulse intensity (Ui) generated by the detection element (71, 72, 73) of one impulse integration cycle (204; 221; 264), a measurement cycle control (90) for adapting the total number of 20 integrated cycle impulses of an impulse integration cycle (204;221;264) to the impulse intensity (Ui) of the single electric impulses, an A / D-converter (81, 82, 83) for converting the voltage of the impulse signal integrator (819, 829, 839) in an optional compulsory A / D conversion interval (100) after the impulse integration cycle (204;221;264), and an A / D-conversion management module (150) for balancing the total number of A / D conversion intervals (100-111) within a time frame (F), whereas the number of supplementary A / D conversion intervals (101-111) after the compulsory A / D conversion interval (100) depends on the length of the corresponding impulse integration cycle (204; 221; 264).

The invention relates to the technical field of liquid crystal panel defect detection, and particularly discloses a liquid crystal panel brightness non-uniform defect detection method and system, an image of a liquid crystal panel in a display mode is obtained by using a photometer, brightness information is captured through a high-precision sensor, and the brightness non-uniform defect of the liquid crystal panel is obtained by using an image segmentation algorithm. In combination with adaptive threshold segmentation, deep learning semantic segmentation and a region growing algorithm, regions with uneven brightness problems are accurately identified and extracted, brightness difference degrees, spatial distribution and time stability are analyzed respectively, corresponding feature indexes are calculated, the feature indexes are integrated, and the brightness difference degree, the spatial distribution and the time stability are calculated. The comprehensive score of each region with uneven brightness is generated through standardized calculation, the regions are divided into slight, medium and serious defects, the method is combined with real-time monitoring, the detection time and parameter setting can be dynamically adjusted, intelligent detection is carried out for different types of uneven brightness defects, the detection efficiency and precision are optimized, and redundant detection is avoided.

An embodiment of a spectrophotometric device for measuring blood oxygen saturation includes a light source, a detector for detecting a light signal reflected by a subject's tissue, an electronic data processing unit to calculate blood oxygen saturation based on the light signal, and a motion sensor for detecting a motion signal indicative of motion of the light source and / or the light detector. The electronic data processing unit may discard a light signal measured by the detector if the motion signal detected by the motion sensor exceeds a predetermined threshold value. An embodiment of a method for measuring blood oxygen saturation includes emitting a light signal into a subject's tissue, detecting the light signal reflected by the tissue, calculating blood oxygen saturation using the light signal measured by the detector, and detecting a contact signal indicative of contact between a subject's skin and the light source and / or the detector.

The invention relates to a diatomic catalyst for detecting carbosulfan pesticide residue and a preparation method, and belongs to the technical field of food safety detection. According to the invention, a reducing sulfide generated by breaking a nitrogen-sulfur (N-S) bond of carbosulfan under an acidic condition is used as a specific substance. The reductive sulfide not only can prevent bimetal active sites in the diatomic catalyst, but also consumes hydroxyl radicals generated by catalyzing hydrogen peroxide (H2O2), and the sensing switch enzyme formed by a dual enzyme inhibition mechanism causes the enzyme substrate 3, 4-dihydroxyl-3, 4-dione to be converted into the diatomic catalyst, so that the catalytic activity of the diatomic catalyst is improved. The blue color of the 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) gradually becomes light along with the increase of the concentration of carbosulfan, sensitive visual detection is implemented, and after a blue product is read by using an ultraviolet spectrophotometer, the absorbance value generated by an ultraviolet absorption spectrum at 654 nm is linearly dependent on carbosulfan. The prepared diatomic catalyst effectively improves the detection sensitivity of the carbosulfan pesticide residue, and has good popularization and application prospects.

The utility model relates to the technical field of food colorimetric analysis equipment, in particular to a food rapid detection colorimetric analysis device based on a smart phone color distinguishing function, which comprises an analysis cassette, a sample placing plate, a lighting unit, a power supply unit, a mobile phone placing frame and a smart phone, the sample placing plate is arranged at the inner bottom of the analysis cassette, a sample to be detected is placed on the sample placing plate, the illumination unit is installed in the analysis cassette to provide illumination conditions required by shooting, and the power supply unit is electrically connected with the illumination unit and supplies power to the illumination unit. A shooting opening is formed in the top of the analysis cassette, and the mobile phone placement frame is mounted at the top of the analysis cassette. The device can replace a spectrophotometer to realize quantitative analysis of chemical harmful substances, is relatively low in manufacturing cost and maintenance cost, has no harsh requirements on the use environment, has relatively low requirements on operators, and is suitable for screening and detection of large-batch samples.

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

The utility model discloses a combustible gas alarm calibration device, relates to the fire safety equipment technology field, and comprises a photometer and a photosensor, the top end of the photometer is fixedly connected with a mounting plate, the bottom surface of the mounting plate is provided with an outer cover, the photosensor is installed on the inner wall surface of the outer cover, the two sides of the outer cover are provided with openings, and the openings are communicated with the mounting plate. The handle is held by a hand to drive the rotating disc to rotate, the rotating disc drives the clamping strip to move through the straight groove, the clamping strip drives the sealing plate to move, meanwhile, the sealing plate is limited by the fixing sleeve through the positioning column, and therefore the sealing plate can be fixed to the fixing sleeve through the positioning column. The positions of the sealing plates are adjusted through the double limiting effects of the rotating disc and the fixing sleeve, the size of a through hole formed by the multiple sealing plates is changed, the size of a through opening for smoke entering is adjusted through error feedback of an original alarm device, and the effect of calibrating the alarm is achieved.

The utility model discloses a flame photometer calibrating device which comprises a combustion reaction box, a detection analysis box and a light path channel, the combustion reaction box and the detection analysis box are connected through the light path channel, a combustor is installed in the combustion reaction box, a photomultiplier tube and a controller are installed in the detection analysis box, the photomultiplier tube is electrically connected with the controller, and the controller is electrically connected with the combustion reaction box. The controller is electrically connected with a control panel, the light path channel is arranged between the burner and the photomultiplier, a light filter is installed in front of the photomultiplier, the light path channel comprises an outer channel and an inner channel, and the outer channel is arranged on the outer side of the inner channel in a sleeving mode. The flame photometer calibrating device optimizes the design of an optical system of a flame photometer detector in high-concentration sample analysis by arranging the optical path channel capable of being lengthened and contracted and changing the length of an optical path, reduces the intensity of an optical signal entering a photomultiplier tube, greatly reduces distortion of a detection signal, and improves the detection accuracy of the flame photometer. The problem of application of the flame photometer calibrating device in high-concentration sample analysis is solved.

The invention provides pathological tissue section dyeing equipment and method. The method comprises the following steps: dividing a to-be-dyed lymphatic tissue section into a plurality of dyeing partitions according to the structural characteristics of lymphocyte tissues in the to-be-dyed lymphatic tissue section; dyeing agents with different concentrations are applied to different dyeing partitions according to the reference light transmittance of the lymphocyte tissue to obtain color gradient vectors of the lymphocyte tissue slices, light absorption characteristics of the dyeing partitions are measured through a photometer, and dyeing characteristics are determined based on the light absorption characteristics and the color gradient vectors; obtaining a dyeing image after dyeing the lymph tissue section, extracting deep features of the dyeing partitions from the dyeing image, and determining a dyeing loss value when dyeing the dyeing partitions based on the deep features and the dyeing features; and based on the dyeing loss value, carrying out self-adaptive adjustment on the dyeing agent concentration of each dyeing zone. By adopting the scheme provided by the invention, optimal adjustment on the concentration of the coloring agent in the sample dyeing process can be realized based on the characteristic difference of the cell tissues at different parts.

A spectrophotometer includes: a light source configured to emit light in a wavelength band including an excitation wavelength which causes a photoreaction on a target substance in a sample, the light source emitting a known number of photons of the light having the excitation wavelength; an integrating sphere having a light entrance port through which light emitted from the light source enters and a light emission port provided at a position deviated from an optical axis of the light entering the light entrance port; a sample placement unit provided in the light entrance port; and a light intensity measurement unit configured to measure intensity of light having the excitation wavelength emitted from the light emission port.

The invention relates to a method for identifying soapberry from soapberry peel based on ultraviolet-visible spectrophotometry. The method is characterized by comprising the following steps: preparing a saponin solution, adding a 5% vanillin-glacial acetic acid solution and perchloric acid, uniformly shaking, heating in a constant-temperature water bath kettle at 70 DEG C for 15 minutes, cooling in an ice-water bath for 3 minutes, adding 5mL glacial acetic acid as a solvent, and measuring the characteristic absorption spectra of the vanillin and the glacial acetic acid by adopting an ultraviolet and visible spectrophotometer. And by utilizing the obvious difference of the number, the peak pattern and the position of the characteristic peaks in the absorption spectrum, the simple and rapid identification of the two is realized. The method has the advantages that the mass of required raw materials is small, the operation is simple, the process flow is short, and the experimental conditions are easy to realize. The technology is a rapid and efficient method for identifying and identifying the pericarp, pericarp powder and pericarp extract of the Sapindus maxima and the Sapindus mukorossi.

The invention discloses a light intensity test method and system of a distribution photometer. The method comprises the following steps: establishing a three-dimensional rectangular coordinate system based on the distribution photometer, and establishing a digital twin model of a light source to be tested based on the three-dimensional rectangular coordinate system; performing region division according to the light source parameter information of the to-be-measured light source to obtain a region division result; detecting the light intensity of each region around the to-be-detected light source in the region division result based on a distribution photometer to obtain the actual light intensity value of each region; based on a region division result, environment parameter information of each region is detected while light intensity detection is carried out on each region, and according to the environment parameter information, a light intensity loss condition caused by environment light intensity detection is analyzed to obtain a light intensity loss amount of each region; and based on a region division result, analyzing errors generated during light intensity detection of each region around the to-be-detected light source during operation of the equipment when light intensity detection is carried out on each region, and obtaining light intensity error values of each region. The method has the effect of improving the light intensity detection accuracy of the distribution photometer.

The invention relates to the technical field of light control, and discloses a light control method and device based on environment self-adaption and a storage medium, and the method comprises the steps: obtaining a color temperature value of a light source, a chromatic value of the light source, environment brightness, a sampling moment and original light brightness; performing luminosity calculation according to the color temperature value, the chromatic value and the ambient brightness to obtain light intensity; carrying out brightness difference calculation according to the environment brightness and the sampling time to obtain a brightness change difference value; performing difference index calculation according to the brightness change difference value to obtain a brightness difference index value; performing intensity judgment according to the light intensity and the brightness difference index value to obtain an environment change degree value; according to the brightness change difference value and the environment change degree value, carrying out comfort calculation to obtain a light comfort value; and performing brightness comparison according to the original light brightness and the light comfort value to obtain an optimal light brightness adjustment value, and adjusting the light brightness according to the optimal light brightness adjustment value. The method can adjust the light state in time according to the change of the environment.

The invention relates to the technical field of photovoltaic film detection, in particular to photovoltaic film performance detection equipment which comprises a spectrophotometer with an integrating sphere accessory, the integrating sphere accessory is mounted in a sample bin of the spectrophotometer, and a mounting mechanism and a wrinkle generator are further mounted in the sample bin. The wrinkle generator comprises a jacking head for applying local mechanical pressure to the photovoltaic film and an L-shaped jacking rod for applying non-uniform mechanical tension, the wrinkle generator further comprises a transmission part, and the jacking head and the L-shaped jacking rod alternately extend out in the front-back direction under the transmission action of the transmission part so that different wrinkles can be generated on the surface of the photovoltaic film; the light transmittance of the photovoltaic film with different inclination degrees and different wrinkle conditions is detected through the spectrophotometer with the integrating sphere accessory, the method is more suitable for the actual use state of the photovoltaic film, the detection result is more accurate, and more reliable basis is provided for performance evaluation of the photovoltaic film.

The invention discloses an organic-inorganic hybrid zero-dimensional halide perovskite single crystal material and a preparation method thereof. The chemical formula of the organic-inorganic hybrid zero-dimensional halide perovskite single crystal material is PMA4InCl7.H2O, and the chemical formula of the antimony-doped single crystal material is PMA4InCl7.H2O: Sb, the corresponding single crystal material is obtained through the steps of raw material adding, cooling crystallization, suction filtration, drying and the like. The optical band gap of the PMA4InCl7. H2O is determined to be 4-5 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O shows light blue; the optical band gap of the PMA4InCl7. H2O: Sb is determined to be 3-4 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O: Sb is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O: Sb shows bright yellow. The maximum quantum yield measured by an absolute fluorescence quantum yield spectrometer can reach 72%.

An UPLC can offer the advantages of improved resolution, shorter analysis time, reduced solvent consumption, and easy connectivity to a mass spectrometer. One of our unique approaches is to use four small linear pumps to achieve gradient elution. We use four binary pumps to achieve continuous gradient elution. We designed an on-line degassing to greatly reduce interference from gas bubbles, thereby maintaining stable pressure. The range of flow speed is controlled from 300 nl / min to 100 ul / min. This portable UPLC can withstand pressures of 15,000 psi or higher. Its size is 30 cm×30 cm×30 cm, and it weighs less than 20 kg. This portable UPLC is equipped with an LED detector, which reduces both cost and system size and has higher sensitivity than a spectrophotometer. We also have the option to easily switch to a conventional detector with a discharge light source and a grating spectrophotometer.

A calculation module for determining a localization, system, eyewear and computer implemented method. The calculation module is configured to receive, from a spectrophotometer of an optical device, data representing a power density of at least two spectral components of a light received by the spectrophotometer and to determine the localization using the power density of the at least two spectral components.

The invention relates to the technical field of photometer detection, in particular to an ultraviolet and visible spectrophotometer and a detection method thereof.The method comprises the steps that reference calibration and blank calibration are sequentially conducted on the ultraviolet and visible spectrophotometer, a to-be-detected sample is placed in a sample chamber of the ultraviolet and visible spectrophotometer, and the ultraviolet and visible spectrophotometer is obtained; turning on a light source to measure the to-be-measured sample, and recording the absorbance value of the to-be-measured sample; drawing an absorbance spectrogram of the to-be-detected sample in the ultraviolet and visible spectrophotometer, and calculating the concentration of the to-be-detected sample according to the standard curve; determining the detection accuracy of the ultraviolet and visible spectrophotometer based on the stray light ratio in the detection process; if the detection accuracy does not meet the requirement, adjusting the light source wavelength of an ultraviolet and visible spectrophotometer; and if the measurement reliability does not meet the requirement, adjusting the size of the diaphragm of the ultraviolet and visible spectrophotometer. According to the invention, the detection accuracy of the ultraviolet and visible spectrophotometer is improved.

The invention discloses a spectrophotometer and a gas detection method, and relates to the technical field of spectrophotometers, the spectrophotometer comprises a spectrophotometer body, a detection chamber and a detector, a detection mechanism is arranged in the spectrophotometer body, and an auxiliary mechanism is arranged on the spectrophotometer body. The first overturning frame and the second overturning frame are overturned upwards to be closed, the inserting block is inserted into the inserting groove to enable the wedge-shaped clamping block to be extruded and retracted, and when the inserting block is completely inserted into the inserting groove, the wedge-shaped clamping block is automatically clamped with the clamping groove under the rebound effect of a third spring; the first overturning frame and the second overturning frame are locked and fixed when being closed, then a limiting rod is pulled downwards along a limiting groove to enable dustproof cloth to stretch downwards, closed dust prevention is conducted on the operation portion of the spectrophotometer in cooperation with a dustproof cover plate, and meanwhile a user can lift and carry the spectrophotometer through a handle groove. And the portability and the practicability of the spectrophotometer are improved.