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6 results about "Pretreatment method" patented technology

Common pretreatment methods. Forebays (small sediment basins) are the most common pretreatment method, though there are many others, including cisterns, drain inlet inserts, oil/water separators, proprietary settling/swirl chambers, and vegetated filter strips.

Electrochemical pretreatment method of cathode for electrolytic extraction of metal gallium

ActiveCN102268714ANo corrosionReduced induction periodAnodisationPhotography auxillary processesPretreatment methodElectrolysis
Belonging to the technical field of electrolytic extraction of metal gallium, the invention provides an electrochemical pretreatment method of a cathode for electrolytic extraction of metal gallium. The method comprises the processes of: subjecting the cathode for electrolytic extraction of gallium to an oil and rust removal treatment; in an acidic, neutral or alkaline electrolyte, carrying out an electrochemical pretreatment to the cathode for gallium electrolytic extraction as an anode, with the cathode made of but not limited to stainless steel, and maintaining the pretreatment at a temperature of 15-40DEG C for 3min-2h, with an anodic current density of 0.01-0.2A / cm<2>. The electrode subjected to an electrochemical pretreatment has a smoother microscopic surface and a uniform surface current distribution. And as the surface of the electrode undergoing the electrochemical pretreatment exposes a partial crystal lattice structure, so the bonding force of electrodeposited gallium and the electrode surface becomes stronger, and the return dissolubility of the electrodeposited gallium in an alkaline condition can be reduced. Thus, continuous metal gallium layers are more likely to be electrodeposited and the induction time of electrodeposition can be shortened. The electrochemical pretreatment method of an electrode in the invention has the advantages of simple process, easy operation and the like.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Pretreatment method of microchemical analysis of pectoral fin strip of Chinese sturgeon

InactiveCN109738266AMeet special requirementsImproved handling of samples not suitable for microchemical analysis of fish pectoral fin raysPreparing sample for investigationMaterial analysis by electric/magnetic meansLaser ablation inductively coupled plasma mass spectrometryPretreatment method
The invention relates to a pretreatment method of microchemical analysis of a pectoral fin strip of a Chinese sturgeon, and belongs to the technical field of biological monitoring environments. The pretreatment method includes the steps that a small section of the pectoral fin strip of the Chinese sturgeon is washed and dried in the air, the pectoral fin strip is fixed to a cube resin block, aftersolidification, the cube resin block is fixed to the upper surface of a bottom plate of a mold in an upright manner, a reagent is prepared, the reagent is added to the fixing mold to form cylindricalresin, the cylindrical resin is polished, the pectoral fin strip is transferred to a glass slide, and pectoral fin strip slices are formed, washed and then dried. According to the pretreatment methodof microchemical analysis of the pectoral fin strip of the Chinese sturgeon, on the premise of satisfying sample conditions required for microchemical analysis, combined with the body characteristicsof the biological tissue of pectoral fins of the Chinese sturgeon, pectoral fin strip samples of the Chinese sturgeon processed by the treatment method can meet the multiple analysis requirements ofelectron probe analysis, laser ablation inductively coupled plasma mass spectrometry and the like, and sample pretreatment methods required for microchemical analysis of the pectoral fin strips of various Chinese sturgeons are unified.
Owner:FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI +1
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