5 results about "GOLD CHLORIDE" patented technology

The invention discloses a rapid enrichment-atomic absorption spectrum analysis method for low-content gold in gold ore, and relates to the technical field of gold ore analysis and detection.The rapid enrichment-atomic absorption spectrum analysis method comprises the following steps that an ore sample and a solid composite additive are mixed and roasted at the low temperature of 500-650 DEG C, and the additive contains alkali metal carbonate and zinc oxide; sulfur fixation, catalytic oxidation of organic carbon and stabilization of volatile elements can be synchronously realized; the method comprises the following steps: roasting gold-loaded activated carbon, dissolving the gold-loaded activated carbon in aqua regia to obtain a to-be-enriched solution, enabling the solution to pass through an adsorption column filled with modified activated carbon, pretreating the activated carbon with a 1-10% ammonium citrate solution to improve the selective adsorption capacity of the activated carbon on gold chloride complex ions, ashing the gold-loaded activated carbon, dissolving residues, fixing the volume, and measuring by using an atomic absorption spectrometry. According to the rapid enrichment-atomic absorption spectrum analysis method for the low-content gold in the gold ore, through cooperation of low-temperature roasting of the composite additive and selective adsorption of the modified activated carbon, the decomposition efficiency and enrichment selectivity of the ore difficult to treat are improved.

This invention provides a PAM staining method that enables staining suitable for magnified observation of various samples using a range of microscopes, from optical microscopes to electron microscopes. [Solution] A PAM staining method comprising the steps of: silvering a biological sample; coloring the biological sample; and fixing the color of the biological sample, wherein the biological sample is a biologically derived sample that has been oxidized; the silvering step involves immersing the biological sample in a methenamine silver aqueous solution at room temperature, raising the methenamine silver aqueous solution from room temperature to 62°C or higher and 68°C or lower, and carrying out the silvering reaction for 30 to 40 minutes from the start of the reaction at room temperature; the coloring step involves immersing the silvered biological sample in a 0.2% gold chloride aqueous solution at room temperature for 8 to 12 hours; and the fixing step involves immersing the sample in a hard film fixing solution containing 11% to 13% sodium thiosulfate and aluminum potassium sulfate dodecahydrate for 3 minutes or more at room temperature.

The utility model relates to an overflowing and filtering system of an electroless gold thread activation tank, which comprises an electroless gold thread activation tank, a filtering device, a filtering device and a control device, and is characterized in that the electroless gold thread activation tank is provided with an overflowing port, a suction port and a backflow port which are communicated with an inner cavity; the filtering mechanism comprises an overflow pipeline, a suction pipeline, a filter element filtering barrel, a connecting pipeline, a filter bag filtering barrel and a backflow pipeline, the upstream end of the overflow pipeline is communicated with the overflow opening, and the downstream end of the overflow pipeline is communicated to the suction pipeline; the upstream end of the suction pipeline is communicated with the suction inlet, and the downstream end of the suction pipeline is communicated to the filter element filter barrel; the filter element filter vat is communicated with the filter bag filter vat through a connecting pipeline; the upstream end of the backflow pipeline is communicated with the filter bag filter vat, and the downstream end of the backflow pipeline is communicated to the backflow port. According to the utility model, the overflow port is formed above the electroless gold thread activation tank, and the filter bag and the filter barrel with higher precision are connected in series in the filter mechanism, so that a better filter effect is realized.

The application discloses a surface treatment method, device, equipment and medium of a gallium arsenide substrate, wherein the surface treatment method of the gallium arsenide substrate comprises the following steps: placing the gallium arsenide substrate in a first solution for washing, wherein the first solution comprises gold chloride and deionized water; and performing laser intermittent irradiation and ultrasonic treatment on the first solution, so that gold ions in the first solution are diffused and the surface of the gallium arsenide substrate is treated. The disclosed scheme improves the process yield of the surface of the gallium arsenide substrate.

The present application relates to the technical field of nanomaterial preparation, and particularly relates to a preparation method of water-soluble azacyclo carbene modified gold nanoparticles. 5-ethynyl-1-methyl-1H imidazole is used as a starting compound, polyethylene glycol modified azacyclo carbene imidazole salt is obtained through alkylation and click reaction, then silver complex is generated through reaction of the imidazole salt and silver oxide, metal conversion of the synthesized silver complex with dimethyl sulfur gold chloride is carried out to obtain gold complex, and finally ligand exchange is carried out in an aqueous solution through the gold complex and citric acid modified gold nanoparticles to obtain azacyclo carbene modified gold nanoparticles. The preparation method is simple and fast, has high yield, does not need to add a reducing agent additionally, has the characteristics of green environmental protection, and the target product prepared has high water solubility, good biocompatibility and uniform morphology.