46 results about "Trace element analysis" patented technology

The invention belongs to an alloy trace element analysis technology and relates to a method for measuring the sulfur content in a powdered high-temperature alloy. In the method, the sulfur content is measured by adopting a high-frequency infrared carbon and sulfur analyzer and a high-frequency induction combustion-infrared ray absorption method. The measurement method comprises the following steps of: measuring a sulfur content blank value; preparing a sulfur correction sample; correcting by adopting the high-frequency infrared carbon and sulfur analyzer; sampling and preparing a sample; preparing a specimen; and measuring the sulfur content in the high-temperature alloy powder sample to be measured. The invention improves the accuracy of a measuring result, solves the measuring problem of the sulfur content in the powdered high-temperature alloy and provides a reliable technical guarantee for the development, the smelting, the application and the quality control of the powdered high-temperature alloy.

The invention discloses a full-automatic trace element analyzer, which relates to the technical field of trace element detection. The full-automatic trace element analyzer mainly comprises a fixed disk, a rotating disk, a driving shaft, a cleaner, a sample adding device, a test electrode, a liftable cleaning platform and the like. A slide rail and a slide way which cooperate with each other are arranged between the rotating disk and the fixed disk to prevent the rotating disk from vibrating up and down during rotation; contact sensors cooperate with balls, an audible and visual alarm gives analarm to remind an operator to replace or adjust the instrument in time when the rotating disk does not rotate in place, the cooperation between triangular fastening blocks and slots can prevent the rotary shaft from slightly rotating when the rotating disk rotates in place, and thereby the accuracy of measurement is ensured; and the number of measuring cup holes in the rotating disk can be permanently designed as six. The practicability is high.

The invention belongs to the field of alloy trace element analysis technologies, and relates to an atomic fluorescence method for measuring the content of arsenic, antimony and bismuth which are contained in a high-temperature alloy FGH96. The atomic fluorescence method comprises the following analysis steps of: weighing a sample material; preparing a sample solution; preparing a calibration solution; preparing a low-standard solution; preparing a high-standard solution; measuring the concentration of the arsenic, the antimony and the bismuth which are contained in the sample solution; calculating a measurement result to obtain the content of the arsenic, the antimony and the bismuth. The invention provides a hydride generation atomic fluorescence method which has the advantages of high analysis sensitivity, easiness and convenience for operation, short analysis cycle and high efficiency and is used for measuring the content of the arsenic, antimony and bismuth which are contained in the high-temperature alloy FGH96. The hydride generation atomic fluorescence method provided by the invention is wide in application prospect, can meet the requirement that the content requirements of impurity elements are more and more strict with the engineering application of the FGH96 alloy and the requirement for control of low-melting point elements, namely the arsenic, the antimony and the bismuth, especially. The atomic fluorescence method provided by the invention meets the requirements of scientific research and production on the quality control of raw materials, reduces the rejection rate of products and saves the development and production cost.

The invention belongs to an alloy trace element analysis technology and relates to a method for measuring selenium and tellurium in a high-temperature alloy FGH96. The method comprises the analysis steps of weighing a test material; preparing a test sample solution; preparing a calibration solution; preparing a low-standard solution; preparing a high-standard solution; measuring the concentration of selenium and the concentration of tellurium in the test sample solution; and calculating according to measured results to obtain the content of selenium and the content of tellurium. The hydride generation atomic fluorescence method provided by the invention is used for measuring the selenium content and the tellurium content in the high-temperature alloy and is high in analysis sensitivity, easy to operate, short in analysis period and high in efficiency. The atomic fluorescence method has wide application prospect and can meet the trend that along with the engineering application of the alloy FGH96, a requirement on the impurity element content is more and more strict, and particularly, the impurities such as selenium and tellurium are controlled strictly. The method can meet requirements of scientific research and production on the quality control of raw materials, reduce the rejection rate of products, and save the development and production costs.

The invention discloses a laser-assisted full-reflection X-fluorescence uranium ore trace element analysis device. The device comprises an excitation light source, a detection device, a sample table,a laser-assisted analysis device, an analyzer and circuit output equipment. The device disclosed by the invention has the advantages that the sample positioning and area and thickness monitoring can be quickly and effectively realized, the influence on the full-reflection optics by the thickness and area change of the sample can be overcome, and the TXRF measurement accuracy is improved. By adopting the full-reflection X-ray fluorescence analysis principle is adopted, the content of the trace heavy metal in the sample can be quickly detected, the detection is simple and fast and low in cost; the precision is high, the measurement time is short, the personal error is small, and the operator labor intensity is low; the X-fluorescence heavy metal measurement instrument is free from chemical pollution and radioactive pollution, short in measurement time, high in precision, simple in structure, safe and reliable, and convenient for use.

The invention belongs to the alloy trace element analysis technology, and relates to a method for measuring hydrogen content in a powder high-temperature alloy. The method is characterized by measuring the hydrogen content in the powder high-temperature alloy with a hydrogen tester by an inert gas pulse heating-thermal conductance method and specifically comprising the following steps: weighing asample material; preparing a sample; performing a blank test; preparing a hydrogen calibration sample; calibrating the sample with the hydrogen tester; and measuring the hydrogen content in the sample. The method of the invention can help improve the accuracy of measuring results and solve the problem of measuring the hydrogen content in the powder high-temperature alloy.

A seabed sulfide ore prospecting method based on topographic analysis, comprising the following steps: step 1: selecting a mineralization prospect zone; step 2: searching for topographic data of the mineralization prospect zone and drawing a seabed topographic map; step 3: analyzing the seabed topographic map, and planning and designing a sampling station; step 4: obtaining a sediment sample at the sampling station position in step 3; step 5: performing heavy sand mineral identification and main trace element analysis on the sediment sample, and drawing a seabed heavy mineral dispersion halo map and a geochemical halo map; step 6: performing overlay analysis on the seabed heavy mineral dispersion halo map and the geochemical halo map, and defining a favorable mineralization zone in combination with the topographic analysis. The method optimizes and innovates the sampling station setting of the seabed sediment, and the sampling station setting is more reasonable and effective; in combination with the heavy mineral and geochemical methods, a better detection effect is realized for inactive hydrothermal zone concealed sulfide and secondary enrichment mineralization; costs are lower compared with other methods.

An experimental method for the influence of trace elements on the growth of algae under different nitrogen and phosphorus conditions. First, a fresh medium is prepared. There is no nitrogen source, phosphorus source and trace elements to be tested in the medium, and then different amounts of N source and P source are put into it. As well as the trace elements to be tested, obtain different N / P ratios and different trace element contents of the medium; then select the experimental algae species and inoculate them into the preset fresh medium containing different nitrogen and phosphorus ratios and different trace element contents middle; then cultivate the algae, measure the algae photometrically, calculate the content of chlorophyll a, then count the algal cell density of the cultivated algae, and finally carry out different nitrogen and phosphorus conditions on the sample according to the measurement results of chlorophyll a and algal cell density. Under the condition that trace elements affect the growth of algae, the present invention can simultaneously measure chlorophyll a and algae cell density in a short time, and quickly reflect the experimental results through the data, which has the advantages of high sensitivity, high precision and high accuracy.

The invention discloses a mobile bearing device for a full-automatic trace element analyzer, which comprises two middle support rods hinged by screw columns, elastic compression parts are hinged at both ends of the two middle support rods, and the elastic compression parts The bottom is provided with a buffer moving mechanism. The present invention arranges a mobile carrying mechanism at the bottom of the instrument, so that the instrument is directly pulled by the pressing plate in the elastic pressing part during installation, and then the instrument is placed on the carrying device, pressed and fixed by the pressing plate, when the instrument is transferred It is only necessary to pull the pressing plate to take out the instrument, and the device is easy to install and disassemble at the bottom of the analyzer.