42 results about "Test sensitivity" patented technology

The invention provides an ion beam etching system with an etching rate in-situ monitoring function and an etching method, the ion beam etching system is provided with an objective table which can deflect by 90 degrees and an electrical test detection element which can move close to or far away from the objective table, and by the etching method, an ion source is not closed, a sample is not taken out, and the etching rate can be accurately measured. The etching depth can be accurately monitored by measuring the surface resistance of the sample in situ, the etching rate can be reduced in time, and the method is more suitable for the tape-out process. According to the ion beam etching system and the etching method, sputter spectrum monitoring is replaced by sample surface resistance detection, so that the test sensitivity is higher, the system cost is lower, the etching precision in magnetic tunnel junction preparation is greatly improved, the sample is prevented from being excessively etched, the thickness of a sample layer can be kept consistent, the resistance distribution is uniform, and the quality of the magnetic tunnel junction is improved. And the high success rate preparation of the SOT-MRAM memory with large capacity and small size is realized.

The invention discloses a high-sensitivity device and method for measuring high-temperature superconducting microwave surface resistance, and belongs to the technical field of electronics, the device comprises a test seat, a calibration seat, a calibration plate, a supporting plate and a sealing cavity, the test seat comprises a test cavity, a dielectric cylinder, an input coupling structure, an output coupling structure and a dielectric supporting device, the dielectric cylinder is a different-diameter coaxial cylinder and is divided into a supporting column and a resonance column, the supporting column is fixed to the testing cavity through a dielectric supporting device, the tail end face of the resonance column and the bottom end face of the testing cavity are located on the same plane, and the diameter of the supporting column is smaller than that of the resonance column. Therefore, the support column and the test cavity jointly form a cut-off waveguide relative to the required resonant frequency, so that the electromagnetic field is bound around the dielectric column, and the test sensitivity is improved. The invention further provides a double-sided cross test method capable of rapidly testing the microwave surface resistance of the front and back surfaces of the high-temperature superconductor sample to be tested, the system error can be remarkably reduced, and the accuracy and reliability of the test are ensured.

The invention discloses a blade dynamic strain measuring point determination method, device and equipment, a storage medium and a product, and the method comprises the steps: S1, calculating a blade modal through finite element software, calculating the dynamic strain sensitivity of different nodes of the blade in different directions according to the information of all finite element nodes under each order derived from a finite element calculation result; s2, screening and searching the maximum value of the dynamic strain sensitivity from the dynamic strain sensitivities of different nodes and different directions to obtain the blade dynamic strain optimal measurement point position and measurement direction of the strain gauge and the minimum sensitivity of the modal group; and S3, similarly calculating the group sensitivity, the optimal measurement point position and the group optimal measurement direction of all modal groups to obtain the blade dynamic strain optimal measurement point position and measurement direction of all strain gauges and the minimum sensitivity of the modal groups. The method avoids omission of the optimal measuring point, has the characteristics of economy, rapidness and high test sensitivity, and can determine more reasonable dynamic strain measuring points and measuring directions.

The disclosure relates to formulations and methods for the in vitro testing of ocular irritants. It was discovered that adding an antioxidant formulation to in vitro ocular irritation tests, including for example, a biochemical ocular irritation test, a reconstituted human corneal epithelium (RhCE) ocular irritation test and an excised eye depth of injury (Dol) test, substantially reduces the rate of false positives without diminishing test sensitivity, resulting in more accurately predicting ocular irritancy of test substances. More particularly, the disclosed method employs relatively high physiologic concentrations of one or more antioxidants that are normally present in tears. In a variation, much higher concentrations of one or more antioxidants may provide protection against in vivo exposure to ocular irritants.

[Problem] In fields such as tumor marker test and pregnancy test kit, it is known to concentrate a target component (protein) by utilizing a superabsorbent polymer (SAP) as a method for improving test sensitivity. However, due to the powder form, SAP exhibits difficulties in handleability and formability and also causes problems such as falling off. Furthermore, the concentration effect is hardly at a sufficient level. The present invention has been made in view of such problems and on the basis of the discovery that a fiber containing an ammonium salt-type carboxyl group and a crosslinked structure serves as a material for protein concentration having excellent handleability and formability, in addition to having a high protein concentration effect. [Solution] A fiber for protein concentration is a fiber that contains an ammonium salt-type carboxyl group and a crosslinked structure, and is characterized by having a water absorption ratio of 4-300 times.

The application provides a ferrite ferromagnetic resonance line width measurement system and a test method based on accurate adjustment of a static magnetic field. The measurement system is based on a resonant cavity method for measurement, a high-Q cavity is used to improve the test sensitivity, and an n-layer Helmholtz coil device is innovatively designed. Through the combination of the n-layer Helmholtz coil device and an electromagnet, accurate adjustment of the static magnetic field loaded on the sample to be measured is realized, thereby overcoming the problem of small measurement range of a high-precision gauss meter, and improving the measurement precision.

The invention provides an ion detection module and a preparation method thereof.The single-channel ion detection module is prepared on the basis of the microfluidic technology, the ion detection module comprises a cavity and a bottom plate from top to bottom, the cavity and the bottom plate are connected in a sealed mode, and an annular counter electrode and a working electrode are arranged at the bottom of a test cavity; the surfaces of the electrodes are electroplated with gold layers, so that the test sensitivity and accuracy are improved; a reference cavity, a liquid complexing part cavity and a test cavity are vertically stacked around the same coaxial shaft, the reference cavity is filled with electrolyte, and the liquid complexing part cavity is electrically connected with test liquid, so that the process of feeding, storing and emptying a sample to be tested can be realized, and meanwhile, the test cavity, the liquid complexing part and the reference cavity are integrated in the vertical direction; the portable heavy metal detection is easy to realize.

The invention discloses a latex enhanced immunoturbidimetry detection reagent for glycosylated hemoglobin and a use method of the latex enhanced immunoturbidimetry detection reagent, and relates to the technical field of medical examination. The latex enhanced immunoturbidimetry detection reagent for glycosylated hemoglobin comprises a reagent R1 and a reagent R2, wherein the reagent R1 comprises first nano microspheres; and the reagent R2 comprises a second nano microsphere coated with a monoclonal antibody of HbA1c. According to the reagent R2, the nano microspheres are coated with the monoclonal antibody of HbA1c, the stability risk caused by the fact that balance needs to be established for immunoreaction of multiple antibodies and antigens is avoided through the monoclonal antibody, the problem that a glycosylated hemoglobin immunoturbidimetry detection reagent is insufficient in stability can be solved, the nano microspheres are arranged on the reagent R2, and therefore the stability of the glycosylated hemoglobin immunoturbidimetry detection reagent is improved, and the stability of the glycosylated hemoglobin immunoturbidimetry detection reagent is improved. By utilizing the characteristic that the volume of an antigen-antibody conjugate can be increased after the nano-microspheres are combined with the HbA1c monoclonal antibody, the turbidimetric degree of latex is effectively amplified, and the detection sensitivity can be improved.

The application discloses a novel target, and particularly relates to the technical field of targets, comprising a visible light target, a frame is fixedly arranged outside the visible light target, a moving unit is installed at the bottom of the frame, the position of the visible light target is finely adjusted by the moving unit, and an adjusting unit is additionally arranged at the bottom of the moving unit. The application realizes the movement of the visible light target test position by the moving unit, and the visible light target is driven to turn sideways in the movement through the slide guide, the tracking difficulty is improved, the test sensitivity is improved, the visible light target on the visible light target can be turned in different directions in the test with the assistance of the adjusting unit, the visible light target is more flexible and can freely move, a good adjustable range is obtained, and when the direction is adjusted, the moving unit and the visible light target are simultaneously driven to rotate by the linkage part, the adjustable range of the visible light target is further expanded, and the operation is more flexible.

The present application relates to the technical field of high temperature resistance test of foamed silicone rubber based on data recognition, and discloses a high temperature resistance test method of foamed silicone rubber based on data recognition. The steps include system parameter setting, test device building, short pulse excitation sampling, frequency domain response extraction, temperature step setting, main frequency statistical analysis, normalized frequency shift ratio and second-order difference acceleration calculation, failure determination and retest confirmation. By constructing a complete data-driven test process, the problems of low efficiency, dependence on subjective experience and difficulty in accurately determining the failure point of traditional thermal failure test are solved. The non-destructive spectral analysis method is used to improve the test sensitivity and repeatability, the data-based determination method enhances the objectivity and automation degree, the retest mechanism is introduced to ensure the reliability of the determination, and finally the structured test report is generated.

The invention relates to the technical field of material performance detection, and particularly discloses a device and a method for detecting the viscosity of a battery pole sealant. The device comprises a base, a standard test plate, a driving mechanism, a bonding test execution mechanism and a displacement sensing mechanism, the driving mechanism is arranged at the top of the base; the standard test board is transversely arranged at the top of the base, and one end is provided with a groove; the adhesion test executing mechanism comprises a sliding block and a temperature control pressure head hinged to the sliding block, the sliding block is driven by a driving mechanism, and a pressure sensor is integrated at the hinged position; the displacement sensing mechanism is arranged on the base; the method comprises the steps of sample loading and positioning, pressing temperature control, constant-speed pulling, synchronous acquisition of adhesive force and displacement, determination of separation time, recording of final displacement, and calculation of viscosity characterization value. According to the invention, a signal is amplified through a single-end bonded and lifted lever structure, and non-contact vision measurement and integrated temperature control are combined, so that the test sensitivity, precision and temperature adaptability are remarkably improved, and efficient, accurate and automatic characterization of the viscosity of the sizing material is realized.

The utility model provides a 50G error code appearance test board of high speed circuit design and PCB engineering application technical field, include: one layer auxiliary signal layer, one layer auxiliary ground layer, be located in the top of auxiliary signal layer, one layer power supply layer, be located in the top of auxiliary ground layer, be connected with auxiliary ground layer through high frequency decoupling capacitor, one layer high speed signal inner layer, be located in the top of power supply layer, one layer complete ground layer, be located in the top of high speed signal inner layer with auxiliary ground layer is connected, one layer high speed signal surface layer, be located in the top of complete ground layer with one error code appearance test chip, a plurality of differential microstrip line, a plurality of differential line, a plurality of high speed connector, one decoupling capacitor array, one terminal capacitance resistance, one ground via array, one shield GND copper skin and one power module are equipped. The utility model has the advantages of: greatly promoted the signal integrity of error code appearance, test sensitivity and measurement accuracy.

The invention relates to the technical field of high temperature resistance tests of foamed silicone rubber based on data identification, and discloses a high temperature resistance test method of foamed silicone rubber based on data identification. The method comprises the steps of system parameter setting, test device building, short pulse excitation sampling, frequency domain response extraction, temperature step length setting, main frequency statistical analysis, normalized frequency shift ratio and second-order differential acceleration calculation, failure judgment, retest confirmation and the like. By constructing a complete data-driven test process, the problems that a traditional thermal failure test is low in efficiency, depends on subjective experience, and failure points are difficult to accurately judge are solved. A non-destructive spectrum analysis method is adopted to improve test sensitivity and repeatability, a datamation judgment mode enhances objectivity and automation degree, a retest mechanism is introduced to guarantee judgment reliability, and a structured test report is finally generated.

This invention discloses a signal analysis method for nondestructive testing of creep in metallic materials. The creep testing process includes: preparation of the test object and acquisition of nondestructive testing signals; projection of basis functions and calculation of parameters on the acquired test signals; comparison of the obtained parameter values ​​with a creep evaluation curve of the same material to assess the degree of creep. The basis functions and creep evaluation curve used in this process should be obtained under specified testing conditions, and the test signals of the tested object should also be obtained under these conditions. This invention patent prepares dedicated comparative test blocks for specific materials, including high-temperature aging test blocks and creep test blocks. It uses a certain amount of test data to extract test parameters and form a set of basis functions, ensuring the specificity of the test parameters to the material and creep structure, improving test sensitivity, reducing the dispersion of test results, and ensuring the repeatability of test results.

The invention provides an enzyme-free glucose biosensor, a preparation method thereof and application of the enzyme-free glucose biosensor in intelligent wearable electronic equipment. The non-enzyme glucose biosensor comprises a flexible material layer, a sensor layer and a perfluorosulfonic polymer layer which are sequentially stacked. The sensor layer comprises a metal sensing material substrate layer and a three-electrode modification layer which is arranged on the outer surface, far away from the perfluorosulfonic polymer layer, of the substrate layer; the three-electrode modification layer comprises a working electrode modification layer, a counter electrode modification layer and a reference electrode modification layer, and materials of the working electrode modification layer comprise copper oxide nanoparticles, calcium titanate nanoparticles and a perfluorosulfonic acid polymer. The glucose biosensor does not need the participation of glucose oxidase, is not easily influenced by external environmental factors, and can improve the stability of the device and the test sensitivity.

An apparatus and method for testing sensitivity consistency of an acoustic emission sensor are provided. The apparatus uses a cylindrical polymethyl methacrylate (PMMA) rod as a test bench. A clamping seat, a clamping block, and a mounting cylinder are mounted on one end of the test bench in cooperation. Under an action of a pressure spring, an end face of a tested sensor keeps pressure-stable coupling contact with an end face of the test bench. A bracket is mounted on another end face of the test bench, and keeps, together with a fixing seat and the clamping seat, the test bench horizontally placed on a desktop. By adjusting a width and an amplitude of a pulse excitation signal of a signal generator, and according to sensitivity distribution and aggregation between tested sensors, a consistency calculation method is used to screen out tested sensors with first, second, and third sensitivity consistency.

The utility model relates to the field of geological survey, concretely is a kind of press-in pressurized micro water test device. The device includes static pressure pipe, rigid water-permeable structure, press pipe sealing cover, water level meter, acquisition instrument and air pressure booster. Static pressure pipe bottom is connected with water-permeable structure and is pressed into target aquifer under the action of static pressure pipe equipment;Press pipe sealing cover is equipped with pressure gauge, pressure relief valve, sealing ring and pressurizing gas port;Water level meter extends into pipe and is connected with acquisition instrument, for collecting water level and pressure signal;Air pressure booster is connected with pressurizing gas port to stimulate water level. The device can complete micro water test without well completion, compact structure, easy operation, reduce construction cost and cycle, reduce disturbance to groundwater environment;Through air pressure instantaneous pressurization and pressure relief, improve test sensitivity and data accuracy;And can be selected static sounding probe collection specific resistance, realize the synchronous acquisition of hydrological parameter and formation information, have strong adaptability, test efficient and the like advantages.

The utility model provides an ion detection module, a single channel ion detection module is prepared based on the microfluidic technology, the ion detection module comprises a cavity and a bottom plate from top to bottom, the cavity and the bottom plate are connected in a sealed mode, an annular counter electrode and a working electrode are arranged at the bottom of a test cavity, and the working electrode is arranged at the bottom of the test cavity. The surfaces of the electrodes are electroplated with gold layers, so that the test sensitivity and accuracy are improved; a reference cavity, a liquid complexing part cavity and a test cavity are vertically stacked around the same coaxial shaft, the reference cavity is filled with electrolyte, and the liquid complexing part cavity is electrically connected with test liquid, so that the process of feeding, storing and emptying a sample to be tested can be realized, and meanwhile, the test cavity, the liquid complexing part and the reference cavity are integrated along the vertical direction; the portable heavy metal detection is easy to realize.

The invention discloses a sample powder tabletting device for micro-area in-situ analysis. The sample powder tabletting device comprises a base, a fixing ring, a splicing plate, a pressing column, an inserting rod, a plastic ring and a polyethylene powder filling body, the number of the splicing plates is multiple, the multiple splicing plates can be connected to the upper surface of the base in a sliding mode, the fixing ring is connected with the outer side wall of the base in an up-down sliding mode, and each splicing plate is provided with a first limiting face; during tablet pressing, the multiple splicing plates are spliced on the base in a sliding mode, the multiple first limiting faces are combined to form a groove, the peripheral sides of the multiple spliced splicing plates are sleeved with the fixing ring, the inserting rod penetrates through the fixing ring to be inserted into the base, and the pressing column is inserted into the groove. The plastic ring is arranged in the groove and used for containing rock powder, and the polyethylene powder filling body is used for being filled in the groove to cover the rock powder in the plastic ring and the outer side of the plastic ring. According to the device, a binder does not need to be added during tabletting, rock powder can be compacted more compactly, and the test sensitivity is improved; the tabletting device is detachable, sampling is convenient, and efficiency is improved.

The invention provides a device and a method for synchronously testing sensitivity and orientation of reconnaissance equipment. The device comprises a rotary table, the reconnaissance equipment, a test antenna, a signal generator, a rotary table control box, a switch, a test computer and a reconnaissance equipment console, the test computer is provided with automatic test software, and the automatic test software reads the parameter configuration table, and is used for sending a control command, receiving, processing and analyzing data fed back by the turntable control box, the signal generator and the reconnaissance equipment console, and storing the data generated in the test process; the switch is connected with the test computer, the signal generator, the turntable control box and the reconnaissance equipment console through a TCP network; the signal generator is used for sending a specified radio frequency signal to the test antenna according to a command after receiving the command of the test computer, and feeding back a state to the test computer; after receiving a command of the test computer, the turntable control box controls the turntable to rotate to a specified direction and feeds back an angle to the test computer in real time; and after receiving the command of the test computer, the reconnaissance equipment console issues a specified working command to the reconnaissance equipment and transmits reconnaissance result information of the reconnaissance equipment to the test computer in real time. The direction and the sensitivity of the reconnaissance equipment are tested synchronously, and the testing efficiency is further improved.

The invention relates to the technical field of intelligent sensor testing, in particular to an induction module testing method, device and system. The method comprises the steps of firstly obtaining test data of an induction module; further acquiring a signal attenuation factor of each test point; further acquiring a signal attenuation coefficient of each spacing distance according to the distribution of the signal attenuation factors of each spacing distance; further obtaining the test sensitivity of each spacing distance according to the difference between the signal attenuation coefficient and the standard signal attenuation coefficient in combination with the detection success rate; and finally obtaining performance test parameters of the induction module. By constructing the dynamic test scene and quantitatively analyzing the signal attenuation and test performance of the induction module under different spacing distances, the problems of long period and poor adaptability of the traditional static test are effectively solved, the test efficiency and the result accuracy are improved, and the comprehensive and reliable performance evaluation of the induction module is ensured.

The application discloses a kind of rock-soil body permeability test methods, specifically related to rock-soil body material permeability detection technical field, for solving the problem that the sensitivity of traditional method is insufficient when testing high-performance concrete and bedrock interface due to low permeability and micro-pore structure of material, and the applicability deviation problem of macroscopic model;It is by constructing sealed test environment under keeping in situ stress state, applying multistage incremental fluid pressure step to stimulate interface micro-pore flow response, monitoring transient seepage signal and analyzing the nonlinear growth law of the decay rate required by initial signal amplitude to reach stability, combined with waveform form and the matching identification of preset typical seepage mode and form deviation quantification, finally based on multi-parameter fusion generates the equivalent permeability of interface to realize accurate and reliable permeability evaluation.

Provided is a biochemical reaction substrate which can achieve higher test sensitivity and shorter testing time in an allergy test, which can also reduce a required amount of blood or the like needed as a specimen and decrease the number of test steps, thereby facilitating performance of the test, and which is to be used in an allergy test in which infection risk of the test staff is reduced. A biochemical reaction substrate, including: a reaction plate; an absorber; a reaction plate storing portion for storing the reaction plate; an absorber storing portion for storing the absorber; a storage container having a heated portion; and a cover assembled to the storage container so as to cover at least a part of the reaction plate and the absorber stored in the storage container, wherein the reaction plate includes a reaction area in which a specific binding substance that specifically reacts with a substance to be tested in a specimen is immobilized, and a flow passage that connects the absorber and the reaction area, and wherein the cover includes an injection hole for injecting a specimen or the like into the reaction plate.

The present application discloses a method, apparatus, device, storage medium, and product for determining blade dynamic strain measurement points. The method comprises the following steps: S1, calculating blade modes using finite element software, and calculating the dynamic strain sensitivities of different blade nodes in different directions based on information of all finite element nodes at each order derived from the finite element calculation results; S2, screening and searching for the maximum dynamic strain sensitivity from the dynamic strain sensitivities of different nodes in different directions to obtain the optimal blade dynamic strain measurement point location and measurement direction of the strain gauge, as well as the minimum sensitivity of the modal group; S3, similarly calculating the group sensitivity, optimal measurement point location, and group optimal measurement direction of all modal groupings to obtain the optimal blade dynamic strain measurement point location and measurement direction of all strain gauges, as well as the minimum sensitivity of the modal group. The present application avoids missing optimal measurement points, is economical, fast, and has high test sensitivity, and can determine more reasonable dynamic strain measurement points and measurement directions.

The invention provides a method for testing leakage of an eye drop container, and the method comprises the following steps: providing the eye drop container which contains liquid; the eye drop container is placed in an environment with the temperature not higher than 0 DEG C for 3-10 h, and / or the eye drop container is placed in an environment with the temperature ranging from 40 DEG C to 60 DEG C for 3-10 h; and / or placing the eye drop container in an environment of 5 Hz to 25 Hz for 3 h to 10 h, and / or placing the eye drop container in an environment of 80 Hz to 100 Hz for 3 h to 10 h; the eye drop container is placed in a vacuum test box, the vacuum test box is vacuumized, so that the eye drop container generates internal and external pressure difference, and the leakage detection result of the eye drop container is obtained through the change of the internal and external pressure difference. According to the test method, the test difficulty of tiny leakage of the eye drop container can be reduced, the test sensitivity and accuracy are improved, and the quality of leakage test of the eye drop container is improved.

A blind cavity volume testing device and method for a phase change device can achieve blind cavity volume testing and measurement of a phase change energy storage device, and the blind cavity volume testing device comprises a vacuum dry pump, a testing valve set, an air storage tank, a sensor assembly, a testing pipeline, an air inlet pipeline, a cavity connector and an air supply connector. The gas storage tank with the standard volume can be selected according to the volume of a to-be-tested product to improve the measurement precision, the system error is eliminated by stably controlling the temperature of the to-be-tested product and the gas storage tank, and in the test process, the to-be-tested cavity is vacuumized through the vacuum pump, a low-vacuum initial state is established, the test sensitivity is improved, and the measurement error is reduced.

The present application relates to the technical field of acoustic testing, and especially relates to a kind of sensitivity testing method of optical fiber curved array hydrophone, after determining the coordinates of sound source, optical fiber curved array hydrophone and standard hydrophone on water test platform, sound source emits single-frequency pulse signal, after data acquisition system obtains the signal received by standard hydrophone and the signal received by optical fiber curved array hydrophone respectively, data analysis system generates analog sound source signal, and direct wave received by standard hydrophone and optical fiber curved array hydrophone is quickly found using correlation algorithm, and the sensitivity testing of optical fiber curved array hydrophone is realized, the present application solves the synchronization problem of different acquisition systems, is an effective supplement to the existing sensitivity testing method of optical fiber curved array hydrophone, and has wide application prospect.

The invention discloses a lithium ion battery storage performance and SEI film stability evaluation method, and relates to the technical field of lithium ion batteries. According to the evaluation method, on the basis of the instability of an SEI film in a low SOC region and the characteristic that the electrochemical reaction rate is accelerated by low current in a high-temperature environment, charging and discharging are repeatedly performed for 56 days by forming an oscillation interval between a first charge state and a second charge state by adopting second current; and observing the volume expansion trend of the battery cell to evaluate the storage performance of the lithium ion battery and the quality of the SEI film. Wherein the volume expansion rate can directly reflect the physical state of the SEI film and does not depend on indirect electrochemical parameters, so that the evaluation result is closer to the interface stability in an actual storage environment. The whole evaluation process is simple, the test sensitivity is high, and SEI film defects can be found early. In addition, the evaluation result can be output in only 56 days, the research and development period is remarkably shortened, the research and development efficiency is effectively improved, and the trial and error cost is reduced.

The invention relates to the technical field of scanning probe microscopes, and discloses a high-precision electrical parameter measurement structure, which is at least applied to a scanning probe microscope, and comprises a probe capable of forming an equivalent capacitance structure with the surface of a sample; wherein the capacitance value of the equivalent capacitance structure responds to the surface state of the sample; the circuit board is integrated with a resonance circuit, and the resonance circuit is connected with the probe so as to form a resonance circuit with the equivalent capacitor structure; wherein the resonance characteristic of the resonance circuit responds to the capacitance value of the equivalent capacitance structure. The resonant circuit is integrated on the circuit board and is physically connected with the probe, so that the equivalent capacitance structure formed by the probe and the surface of the sample is directly used as a component of the resonant circuit, and the probe and the resonant circuit are connected without an independent signal line. Energy loss generated in the signal transmission process is effectively avoided, interference of transmission line stray capacitance on measurement is eliminated, and therefore test sensitivity is improved. The invention also discloses a measuring method and a scanning probe microscope.

The disclosure relates to formulations and methods for the in vitro testing of ocular irritants. It was discovered that adding an antioxidant formulation to in vitro ocular irritation tests, including for example, a biochemical ocular irritation test, a reconstituted human corneal epithelium (RhCE) ocular irritation test and an excised eye depth of injury (DoI) test, substantially reduces the rate of false positives without diminishing test sensitivity, resulting in more accurately predicting ocular irritancy of test substances. More particularly, the disclosed method employs relatively high physiologic concentrations of one or more antioxidants that are normally present in tears. In a variation, much higher concentrations of one or more antioxidants may provide protection against in vivo exposure to ocular irritants.