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Cisatracurium besilate content testing method
InactiveCN103868868AEasy to prepareReduce pollutionPreparing sample for investigationColor/spectral properties measurementsSpectrophotometryCisatracurium besilate
The invention discloses a cisatracurium besilate content testing method which comprises the following steps: respectively weighing a test substance and a reference substance in a measuring flask, adding hydrochloric acid for dissolving and metering a volume to a scale, shaking up to prepare a corresponding solution, finally, measuring the solution according to an ultraviolet-visible spectrophotometry, measuring absorbance at a place of a maximum adsorption wavelength of 280nm, and calculating the content of cisatracurium besilate according to an anhydrous substance. According to the cisatracurium besilate content testing method, the solution is simply and conveniently prepared, no organic solvent is used, and the pollution to the environment and the harm to a human body are small. The cisatracurium besilate content testing method is higher in testing speed, and the time of testing each batch of products in average only needs 30 min. A place of a maximum adsorption wavelength of 280 nm is selected, so that the testing accuracy is ensured. The cost of a reagent used in a process of checking each batch of samples does not exceed 20 yuan; the testing cost of each batch of samples by adopting a high-performance liquid chromatography method is not less than 200 yuan, so that the cost of enterprises is greatly lowered.
Owner:SHANGHAI PHARMA DONGYING JIANGSU PHARMA CO LTD
Preparation method and application of pure copper dendrite etchant
ActiveCN118777021BSolve the problem of difficult to show corrosionFast inspectionPreparing sample for investigationGrain structureTin(II) chloride
The invention discloses a preparation method and application of a dendrite etchant for pure copper, belonging to the field of metallurgical analysis technology. The dendrite etchant is prepared from picric acid, stannous chloride, ferric chloride, hydrochloric acid, anhydrous ethanol and distilled water, and can clearly display the solidified dendrite structure of pure copper ingot or ingot, including the fine grain structure of the surface layer, the columnar crystal structure in the middle, and the equiaxed crystal structure in the center; by observing with the naked eye, combined with scanning photography and magnification observation, the solidified structure of the ingot can be accurately judged, and can be used to evaluate the quality of the cast structure under the pure copper casting process; the technology has the characteristics of fast inspection speed, high efficiency, simple operation, etc., and solves the problem that the dendrite structure of pure copper is difficult to corrode and show.
Owner:ANGANG STEEL CO LTD
Method for detecting activity of protease preparation for external use
PendingCN119552942Aaccurate measurementFast inspectionMicrobiological testing/measurementBiological material analysisProtease preparationOrganosolv
The invention provides an activity detection method of an external protease preparation, which comprises the following steps: (1) dispersing the external protease preparation in a water-insoluble organic solvent to form a protease-containing dispersion system; (2) adding a buffer solution for extraction, so that the protease is transferred into the buffer solution from the water-insoluble organic solvent, and an extract containing the protease is formed; and (3) collecting and measuring the activity of the protease in the extract liquor so as to evaluate the activity level of the protease in the external protease preparation. The method disclosed by the invention can be used for testing the activity of an external preparation of protease, particularly testing protease ointments, animal collagen can be selected as a substrate, the structure of the animal collagen is consistent with that of human collagen, and the activity of the protease acting on a human body can be effectively reflected. The specific amino acid is adopted as a determination target, the titer of the high-activity protease can be accurately determined, the detection speed is high, and the method is suitable for production control.
Owner:LIAONING WEIBANG BIOLOGICAL PHARM CO LTD
Light-weight power battery box with high air tightness
ActiveCN119324289Alight in massImprove battery lifeBattery isolationSecondary cellsPower batteryStructural engineering
The invention provides a light-weight power battery box with high air tightness, and belongs to the technical field of power battery boxes. Comprising a lower box body, an upper box body is arranged at the top of the lower box body, a plastic box cover is installed at the top of the upper box body, a plug is installed at the front end of the lower box body, a lower protection shell is installed at the bottom of the lower box body, a plastic frame is arranged in the lower box body, and a transverse support is installed on the inner wall of the plastic frame. By arranging the connection adjusting assembly and the airtight adjusting assembly, the power battery box body can achieve the connection effect through the connector, use of bolts is reduced, light weight is achieved, the assembly time is shortened, the assembly cost is reduced, the capacity of facing emergency situations is improved, the speed of separating a battery pack from a carrier is increased, and the safety time for personnel to escape is prolonged; and the complementary effect of the rubber sealing ring and the alloy solution sleeve is beneficial to keeping the long-term leakproofness of the power battery box body and improving the overall structural strength and safety of the box body.
Owner:河北华曙新能源汽车科技有限公司
Sliding damping detection device
Owner:YIKAI PRECISION TECH (DONGGUAN) CO LTD