39 results about "Metal analysis" patented technology

Quartz member such as a quartz tube for semiconductor manufacturing equipment capable of heat treating a substrate to be treated without causing contamination, a manufacturing method of such quartz member, thermal treatment equipment furnished with such quartz member, and an analysis method of metal in quartz member are provided. A quartz specimen is immersed in hydrofluoric acid to expose a layer to be analyzed located at a prescribed depth. On an exposed surface, a decomposition liquid such as hydrofluoric acid or nitric acid is dripped to decompose only an extremely thin layer to be analyzed, followed by recovering of the decomposition liquid. The decomposition liquid is quantitatively analyzed by use of atomic absorption spectroscopy (AAS) or the like to measure an amount of metal contained in the decomposition liquid. From a difference of thicknesses before and after the decomposition and an area of dripped decomposition liquid, a volume of a decomposed layer to be analyzed is obtained. From this and the amount of metal contained in the decomposition liquid, a concentration of metal contained in the layer to be analyzed, in addition a diffusion coefficient of a layer to be analyzed is calculated. With thus obtained diffusion coefficient as an index, quartz material in which metal diffuses with difficulty is sorted out. With thus sorted quartz material, a quartz member used for semiconductor manufacturing equipment such as a quartz tube is manufactured.

A system and method for detecting, measuring, and analyzing for metallic impurities in pharmaceutical drugs and compounds utilizes an x-ray fluorescence system. The system and method may be co-located with a pharmaceutical manufacturing process for in-line continuous monitoring of metal impurities. The pharmaceutical products may be in a form selected from a powder, slurry, pill, tablet, and gel.

The invention discloses an online water heavy metal analyzer. The heavy metal analyzer comprises an industrial-grade integrated control unit, a detection unit, an automatic sampling unit, a water sample pretreatment unit and an external input/output unit. The online water heavy metal analyzer provided by the invention can utilize the industrial-grade integrated control unit for automatically controlling the detection unit, the automatic sampling unit, the water sample pretreatment unit and the external input/output unit through a communication interface. According to the online water heavy metal analyzer, the modularized idea is adopted, the number and the types of the units can be increased and reduced conveniently, meanwhile, components inside the units are independent and also can be increased and reduced. Due to the adoption of a low-cost standard network cabinet, the overall cost can be lowered and convenience can be brought for the data processing.

The invention, which belongs to the field of platinum group metal analysis and detection, discloses a method for accurately detecting contents of platinum, palladium and rhodium in a waste automobileexhaust catalyst. According to the invention, burdening, smelting trapping, ash blowing separation of metal bismuth and platinum, palladium and rhodium content detection are performed based on bismuthtest gold pyrometallurgy metal enrichment technological process and the process optimization is performed, so that problems of matrix interference and incapability of ash blowing in the traditional method are solved and a defect that platinum, palladium and rhodium in the waste automobile tail gas catalyst are difficult to effectively capture, separate and detect by adopting the existing method is overcome. Therefore, the recovery rate of platinum, palladium and rhodium is increased and the accurate detection of the contents of platinum, palladium and rhodium in the waste automobile tail gascatalyst is ensured.

The invention discloses a portable water heavy metal analyzer and an analytic method thereof. The analyzer is formed by an electrolytic device and an analyzer main body, wherein the electrolytic device comprises a top cover, an electrode mounting base, a transparent window, a pedestal, a stirring motor, electrodes, a stirring rod and an electrolytic cup; and the analyzer main body comprises an outward interface and an internal circuit module. All the parts of the analyzer harmoniously work under the control of an embedded system to automatically control the enriching, stirring, standing and dissolve-out processes. The analyzer and the analytic method have the advantages of realization of the rapid and accurate detection of the concentrations of heavy metal ions in water, realization of the simultaneous generation of test data and a test place, and avoiding of the generation of artificial recording or statistic errors. The analyzer can be directly used for the emergent and rapid detection of onsite heavy metal pollutions in the field.

The present invention discloses a network online water quality heavy metal analyzer, which comprises an industrial grade integrated control unit, a detection unit, an automatic sampling unit, a water sample pre-treatment unit, an external input and output unit, and a network module, wherein the industrial grade integrated control unit can automatically control the detection unit, the automatic sampling unit, the water sample pre-treatment unit and the external input and output unit through communication interfaces. According to the present invention, the modularization idea is adopted so as to conveniently expand and reduce the number and the type of the units, assemblies in the units are independent so as to be conveniently expanded and reduced, the low cost standard network cabinet is adopted so as to reduce the whole cost and conveniently process data, and to adapt to remote control requirements, the network module can conveniently perform data transmission through the wired and wireless network.

The invention belongs to the technical field of metal analysis, and particularly relates to a method for analyzing and quantifying total carbon in a gold material, which comprises the following stepsof: weighing a sample, heating in vacuum, precisely weighing for the first time, cleaning and removing carbon, precisely weighing for the second time and calculating the total carbon. According to themethod, the carbon element dissolved in the gold can be converted into a black film floating on the surface of the gold, removal is convenient, the obtained total carbon content is direct and accurate, and commercial application is facilitated.

A trade metal analysis detector and method of operating the same to detect metals in various fluid samples using boron doped diamond working electrodes.

The invention relates to the technical field of atmospheric sampling and detecting devices, in particular to an automatic cruise type atmospheric heavy metal sampling and detecting device based on an unmanned aerial vehicle. The device comprises: an unmanned aerial vehicle; a heating bin assembly arranged on the bottom rack of the unmanned aerial vehicle; an open air inlet pipe arranged at the air inlet end of the heating bin assembly through a flange; a filter screen arranged in the heating bin assembly; an air entraining assembly arranged in the heating bin assembly; a three-way gas control assembly; a heavy metal analyzer; a first air extraction mechanism; a sample storage mechanism arranged at the air outlet end of the first air extraction mechanism; and a cleaning device, wherein the output end of the cleaning device is communicated with the interior of the heating bin assembly. According to the technical scheme, atmospheric air can be sampled, the content of various heavy metals in the air can be analyzed in a targeted manner, and different sample air can be preserved.

The invention belongs to the technical field of metal analysis, and particularly relates to a fire assaying analysis method for a gold-containing solution. The fire assaying analysis method comprisesthe steps of sampling, evaporation, Ph adjustment, heating, shaping, cupellation and constant volume setting. The fire assaying analysis method is characterized by integrating a fire assaying method,a gravimetric method and an ICP method, combining their advantages and achieving precise analysis of the gold-containing solution.

The invention belongs to the technical field of environmental analysis chemistry and new material preparation, and particularly relates to a covalent organic framework material of a sulfydryl functionalized beta-ketoenamine structure as well as a preparation method and application of the covalent organic framework material. When the covalent organic framework material is applied to quantitative separation and enrichment of heavy metals (Co < 2 + >, Ni < 2 + > and Cd < 2 + >) in an environmental water sample, the problems of complex matrix interference and low sensitivity of a detection instrument during analysis of trace heavy metals in the current environmental water sample can be solved, and the covalent organic framework material is stable in property, and can be utilized repeatedly.

The invention provides a method for analyzing the contents and the valence states of metals inside and outside a doped mesoporous molecular sieve framework. The method comprises the following steps of: soaking a doped mesoporous molecular sieve with concentrated acid or strong base at higher temperature for a certain time, centrifuging and filtering, or repeating the operations until metal ions are not detected in waste dreg, and titrating and analyzing supernatant to obtain total metal content of the doped mesoporous molecular sieve; adding diluted acid or alkali in the doped mesoporous molecular sieve at room temperature and stirring for a certain time, centrifuging and filtering, or repeating the operations until metal ions are not detected in the filtrate, and titrating and analyzing supernatant to obtain the surface metal content of the doped mesoporous molecular sieve; and removing surface metal ions to obtain the content of the metal in the molecular sieve framework. The metal ions with different contents and valence states can be analyzed by a standard titration method. The invention almost covers all the metal analysis of the doped mesoporous molecular sieve.