| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 436081000 |
Zn, Cd, Hg, Sc, Y, or Actinides, or Lanthanides
| 30 |
| 436079000 |
Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra
| 26 |
| 436080000 |
Cu, Ag, Au
| 21 |
| 436084000 |
Mn, Te, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
| 17 |
| 436076000 |
Organometallic compound determined
| 10 |
| 436074000 |
Present in biological fluids (e.g., blood, urine, etc.)
| 8 |
| 436083000 |
Ti, Zr, Hf, Va, Nb, Ta, Cr, Mo, W
| 7 |
| 436075000 |
Oxide or gas content of metal (e.g., determination of dissolved gases, etc.) | 2 |
| 20100167407 | Nickel Crucible for Melting Analytical Sample, Method of Preparing Analytical Sample and Method of Analysis - A nickel crucible used for melting an analytical sample in the pretreatment of the analytical sample, characterized in that the purity of the nickel crucible is 99.9999 wt % or higher. Also provided is a method of analysis, comprising melting a sample by the use of the nickel crucible for melting having a purity of 99.9999 wt % or higher, and analyzing the melt to thereby obtain an analytical result in which the respective lower limits of determination of Mn, Al, Si, Mg, Pb, Fe, Co, Ti, Cu, Cr, Zr, Mo, and W are Mn: 5 wtppm, Al: 10 wtppm, Si: 10 wtppm, Mg: 5 wtppm, Pb: 5 wtppm, Fe: 5 wtppm, Co: 5 wtppm, Ti: 20 wtppm, Cu: 20 wtppm, Cr: 10 wtppm, Zr: 5 wtppm, Mo: 2 wtppm, and W:10 wtppm. In light of the recent analytical technology demanded of fast and accurate measurement of high purity materials, high purity analysis is attained through inhibition of mixing of impurities from the crucible. | 07-01-2010 |
| 20130017612 | pH-Sensitive Microparticles with Matrix-Dispersed Active Agent - Methods to produce pH-sensitive microparticles that have an active agent dispersed in a polymer matrix have certain advantages over microcapsules with an active agent encapsulated in an interior compartment/core inside of a polymer wall. The current invention relates to pH-sensitive microparticles that have a corrosion-detecting or corrosion-inhibiting active agent or active agents dispersed within a polymer matrix of the microparticles. The pH-sensitive microparticles can be used in various coating compositions on metal objects for corrosion detecting and/or inhibiting. | 01-17-2013 |
| 436078000 |
Presence of a component of steel | 1 |
| 20120288946 | NON-DESTRUCTIVE METHOD FOR DETECTING MACHINING BURNS OF A VERY-HIGH-STRENGTH STEEL, AND COLOUR CHART FOR CALIBRATING MACHINING BURNS OF SAID STEEL - A method for efficient, industrialisable detection of machining burns of VHS steel. Machined steel is immersed in an aqueous solution of acids including hydrofluoric acid and nitric acid. To define a burn degree, a color chart for calibrating machining burns of VHS steel detected using the method is prepared. The color chart can include studs of the examined steel subjected to deliberate damage by excessive resurfacing actions (or other machining modes), then submerged in the acid solution. The resurfacing actions can be simulated by overheated thermal treatment, between an ageing temperature (for example 510° C. for steel) and a solution annealing temperature (950° C. for the steel). The samples are classified according to the grey level thereof resulting from the immersion and corresponding to a predetermined hardness and thus to a predetermined level of damage. | 11-15-2012 |
| Entries |
| Document | Title | Date |
|---|
| 20080213908 | FLAME DETECTOR - Improved operating modes of a micro counter-current flame ionization detector (μFID) are demonstrated. By operating the flame inside the end of a capillary gas chromatography (GC) column, the effective cell volume enclosing the flame is considerably reduced and results in significantly lower gas flows being required to produce optimal sensitivity from the stable flame. In a post-column μFID arrangement, a very lean flame is now situated on the end of a stainless steel capillary delivering 10 mL/min of hydrogen, which is opposed by a counter-current flow of only 20 mL/min of oxygen. The μFID detection limit obtained in this stable, oxygen-rich counter-current flame mode is 7×10 | 09-04-2008 |
| 20080220531 | STIMULI-RESPONSIVE MAGNETIC NANOPARTICLES AND RELATED METHODS - Stimuli-responsive magnetic nanoparticles, methods of making the nanoparticles, and methods of using the nanoparticles. | 09-11-2008 |
| 20080241943 | Subnanomolar Precipitator of Thiophilic Metals - A fluorescent dye-doped crystalline assay is employed for selection and detection of thiophilic heavy metal ions. While comparable in analytical performance to known solution based methodologies, the formation of crystalline analytes provides for signal amplification, and consequently, a powerful platform whose analysis is directly amenable to high-throughput video capture systems. In a microcapillary format, this assay is capable of screening hundreds of samples per day for the presence of subnanomolar concentrations of Hg | 10-02-2008 |
| 20090098655 | Detection Apparatus and Methods - A chemical cell ( | 04-16-2009 |
| 20090186418 | Test method and kit - A test method and kit are disclosed. The method is for use with an object, said method comprising the steps of: (a) treating a surface of the object to expose an undersurface area; (b) exposing the undersurface to a sulfide; and (c) visually monitoring the appearance of the sulfide to which the undersurface was exposed for a color change. The color change is indicative of the presence or absence of lead in the object. The test kit can comprise: an abrasive material; a vessel containing a water soluble sulfide solution; a lead-free color comparison chart to which the color of the sulfide can be compared; and a confirmation strip adapted to cause said sulfide to undergo a color change, when exposed to said strip, at least similar to the color change that would be produced in the sulfide on exposure to lead. | 07-23-2009 |
| 20090298183 | METHOD AND APPARATUS FOR ANALYZING ARSENIC CONCENTRATIONS USING GAS PHASE OZONE CHEMILUMINESCENCE - A method of detecting arsenic comprising acidifying at least one sample comprising a known arsenic concentration, reducing arsenic in the sample having the known arsenic concentration to arsine, contacting the arsine in the sample having the known arsenic concentration with a reagent to produce a chemiluminescent emission, measuring the intensity of chemiluminescent emission produced by the sample having the known arsenic concentration, acidifying at least one sample comprising an unknown arsenic concentration, reducing arsenic in the sample having the unknown arsenic concentration to arsine, contacting the arsine in the sample having the unknown arsenic concentration with a photoagent to produce a chemiluminescent emission, measuring the intensity of chemiluminescence emission produced by the sample having the unknown arsenic concentration, and determining the arsenic content in the sample having an unknown arsenic concentration by comparing the intensity of chemiluminescent emission of the sample comprising a known arsenic concentration to the chemiluminescent emission of the sample comprising an unknown arsenic concentration, wherein the arsine is not subjected to a low-temperature trap prior to the reaction with a photoagent. | 12-03-2009 |
| 20100041158 | Lead sensor and methods of use - A fluorophore that forms a complex with Pb ions is disclosed. The fluorophore/lead complex fluoresces with an intensity greater than complexes formed by the fluorophore with other metals. The fluorophore may be used as a sensor/detector for lead ions in various samples. Methods for detecting and calculating the concentration of lead ions in samples are also disclosed. | 02-18-2010 |
| 20100062536 | DETECTOR FOR THE DETECTION OF CHEMICAL WARFARE AGENTS AND METHOD OF MANUFACTURE THEREOF - In a method and apparatus for detecting toxic chemical hazardous materials and warfare agents in a gas, the gas is exposed to a substrate with a hydrogen terminated surface. The substrate may be made from a nonconductor material with available surface conductivity, or from a semiconductor material. The electrical resistance at the hydrogen terminated surface is measured to detect the presence of the hazardous materials and warfare agents. A method of producing such a substrate detector is also disclosed. | 03-11-2010 |
| 20100075427 | METHODS OF TREATING A SURFACE TO PROMOTE METAL PLATING AND DEVICES FORMED - Embodiments of the present invention provide methods of treating a surface of a substrate. In one embodiment a kit for carrying out the binding of metals to a substrate is provided, comprising: a container comprising a heat-resistant organic molecule derivatized with an attachment group Y and a binding group X, the binding group X promotes binding of metals; and instructional materials teaching coupling the organic molecule to the substrate by heating the molecule and/or the surface to a temperature of at least 25° C. | 03-25-2010 |
| 20100105144 | ONIUM SALTS AND USE THEREOF FOR DETECTING AND ASSAYING METALS - Task-specific onium salts, process for preparing them and use thereof for detecting and assaying metals, in particular heavy metals, in an aqueous medium. | 04-29-2010 |
| 20100159606 | METHOD, DEVICE AND APPARATUS FOR MEASURING THE CONCENTRATION OF CREATININE, AND METHOD, DEVICE AND APPARATUS FOR MEASURING THE AMOUNT OF SALT USING THE SAME - A method for measuring a concentration of creatinine includes the steps of: (A) mixing a sample containing creatinine with a creatinine quantitative reagent containing a metal complex of at least one of hexacyanoferrate and hexacyanoruthenate in the absence of picric acid and any enzyme responsive to creatinine, to cause the creatinine to reduce the metal complex; (B) electrochemically or optically measuring the amount of the metal complex reduced in the step (A); and (C) determining the concentration of the creatinine contained in the sample from the amount of the reduced metal complex measured in the step (B). | 06-24-2010 |
| 20100197030 | XANTHENE DYES COMPRISING A SULFONAMIDE GROUP - The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions. | 08-05-2010 |
| 20100221839 | Metal Abstraction Peptide (MAP) Tag and Associated Methods - Compositions comprising a tripeptide having the sequence XC | 09-02-2010 |
| 20100291692 | METHOD FOR ANALYZING METAL SPECIMEN - A method for analyzing a metal specimen includes an electrolysis step of electrolyzing a metal specimen containing a reference element and a target element in an electrolytic solution, a sampling step of sampling a portion of the electrolytic solution, an analysis step of analyzing the sampled electrolytic solution, a concentration ratio-calculating step of calculating the concentration ratio of the target element to the reference element in the electrolytic solution on the basis of the analysis results, and a content-calculating step of calculating the content of the target element present in the form of a solid solution by multiplying the content of the reference element in the metal specimen by the obtained concentration ratio. | 11-18-2010 |
| 20100291693 | ORAL FLUID ASSAYS FOR THE DETECTION OF HEAVY METAL EXPOSURE - Methods for measuring the concentration of heavy metals such as aluminum, antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, lead, manganese, molybdenum, nickel, selenium, silver, strontium, thallium, uranium, vanadium, zinc, or mixtures thereof in oral fluid are provided. The concentration of heavy metals in oral fluid can be accurately correlated with the concentration of heavy metal in the blood serum. The methods are useful for, among other things, diagnosis and monitoring of heavy metal exposure. | 11-18-2010 |
| 20110020943 | DRY TESTING TOOL, METHOD FOR MEASURING METAL, AND METHOD FOR PRODUCING DRY TESTING TOOL - The present invention provides a dry testing tool with which a metal in the various types of samples such as biological samples, food, and the like can be measured very easily, rapidly, high sensitively, and specifically by a simple colorimetric method and a method for measuring the metal. The dry testing tool of the present invention is a dry testing tool for measuring a metal in a sample, including a porous support and a chelate dye, wherein the chelate dye is bound to the porous support by a hydrophobic bond. The measuring method of the present invention is a method for measuring a metal in a sample, including the steps of: forming a composite of the chelate dye and the metal in the sample by supplying the sample to the porous support to which a chelate dye is bound by a hydrophobic bond; and detecting the metal in the sample using a developed color of the composite. | 01-27-2011 |
| 20110059535 | Electronic Methods for the Detection of Analytes - The present invention is directed to the detection of target analytes using electronic techniques, particularly AC techniques. | 03-10-2011 |
| 20110104812 | PROCESS FOR TREATING POLYMERS CONTAINING RESIDUAL CATALYST - Process for thermally stabilizing a polymer containing residues of a Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), or Ge(II)-containing catalyst by treating the polymer at a temperature above its melting temperature with a peroxide selected from the group consisting of ketone peroxides, hydroperoxides, peracids, hydrogen peroxide, and mixtures thereof, wherein said peroxide is used in an amount less than 0.2 wt % based on the weight of the polymer and wherein the molar ratio of peroxy functionalities from said peroxide (p) to metal (M) ranges from 1 to 100; said metal (M) being selected from the group consisting of Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), and Ge(II). The invention further relates to a method for determining the metal residue content of a polymer. | 05-05-2011 |
| 20110177604 | METHOD FOR DETECTING LEAD PRESENT IN SPECIMEN - With respect to a lead detection method that uses rhodizonic acid, it is made possible to clearly identify pink or red coloration caused by a reaction between lead and rhodizonic acid even in cases where Sn is present in a specimen. To this end, an acidic aqueous solution or a buffer solution thereof (e.g., tartaric acid) in which hydrogen peroxide coexists is used as a reagent. Hydrogen peroxide oxidizes Sn | 07-21-2011 |
| 20110217782 | METHOD FOR ANALYZING ANTIMONY CONTAINED IN GLASS - According to one embodiment, there is provided a method of analyzing antimony contained in glass according to its valency. This method includes milling glass containing antimony into a glass powder, weighing the glass powder and dissolving the glass powder by using hydrofluoric acid and hydrochloric acid to obtain a glass solution, masking hydrofluoric acid by adding aluminum ions to the glass solution, adding sodium borohydride and hydrochloric acid to the glass solution in which hydrofluoric acid is masked to generate a hydride of antimony (III), determining a concentration of antimony (III) contained in the glass solution based on the hydride, determining a total concentration of antimony contained in the glass solution and calculating a difference between the concentration of antimony (III) and the total concentration of antimony to obtain a concentration of antimony (V) from the difference. | 09-08-2011 |
| 20110269240 | IMMOBILIZING CHEMICAL OR BIOLOGICAL SENSING MOLECULES ON SEMI-CONDUCTING NANOWIRES - The present invention is drawn toward a chemical or biological sensor that can comprise a semi-conducting nanowire and a chemical or biological sensing molecule tethered to the semi-conducting nanowire through a spacer group including a hydrophilic reactive group. In one embodiment, the semi-conducting nanowire can be part of an array of like or similar semi-conducting nanowires. Electrical leads can provide an electrical current to the array, and a signal measurement apparatus can be electrically coupled to the array, and can be configured for detecting changes in the electrical current of the array. | 11-03-2011 |
| 20110294222 | LEAD ASSAY - Process for metering lead in a sample of original water, in which is placed a sample of the water of which at least a substantial portion of the colloidal and organic material is passed in solution (sample of pretreated water), having: a first stage, starting from a sample of pretreated water with an adjusted pH, the lead is concentrated and the other parasitic ions are at least partially eliminated to obtain a sample of water that is concentrated with lead and substantially lacking in other parasitic ions (sample of lead-concentrated water); and a second stage in which, starting from the sample of lead-concentrated water, the sample of lead-concentrated water is mixed with a selective, lead-sensitive fluorescent probe whose fluorescence intensity/lead metering function is known; then, the thus produced water/fluorescent probe mixture is excited by the light, and the fluorescence intensity of the thus excited water/fluorescent probe mixture is collected optically; finally, starting from the thus detected fluorescence intensity, the lead metering of the sample to be metered is determined based on the fluorescence intensity/lead metering function. | 12-01-2011 |
| 20120088306 | Method Of Assaying Noble Metals - Provided is a method of assaying noble metals in a mineral and/or ceramic matrix in the content range from 0.03 to 500 mg/kg. The method comprises dry thermal treatment of a homogenized sample in a reducing atmosphere, extraction in an oxidizing medium, and atomic spectrometric quantification of the noble metals by means of ICP-QMS. | 04-12-2012 |
| 20120190118 | COMPONENT HAVING A PROTECTIVE LAYER THAT CAN BE MONITORED MAGNETICALLY AND METHOD FOR OPERATING A COMPONENT - A component for high-temperature use comprises a metallic base material and a non-ferromagnetic protective layer arranged thereon, which is able to form a protective oxide layer on the component surface at temperatures between 600° C. and 1100° C. A sensor material is introduced into the protective layer, wherein, in the stated temperature range, the local magnetism, notably ferromagnetism or ferrimagnetism, at the site of the sensor material is dependent on the local concentration and/or composition of the material of the protective layer in the immediate vicinity of the sensor material and/or on the cumulative temperature-time curve at the site of the sensor material. The component can be examined non-destructively, from the outside, for the local magnetism in the protective layer, which is typically between 100 μm and 500 μm thick. | 07-26-2012 |
| 20130017611 | SENSOR MATERIAL AND METHOD FOR FABRICATING THE SAME AND DETECTING METHODAANM LI; Shou-NanAACI Nantou CountyAACO TWAAGP LI; Shou-Nan Nantou County TWAANM LIN; Hong-PingAACI Taipei CityAACO TWAAGP LIN; Hong-Ping Taipei City TWAANM SHIH; Hui-YaAACI Changhua CountyAACO TWAAGP SHIH; Hui-Ya Changhua County TWAANM HSIEH; Wen-AnAACI New Taipei CityAACO TWAAGP HSIEH; Wen-An New Taipei City TWAANM LIN; Jhih-JieAACI New Taipei CityAACO TWAAGP LIN; Jhih-Jie New Taipei City TW - A method for fabricating a sensor material for detecting molecular contaminants, including the steps of: providing an aqueous solution of a metal oxide precursor; mixing titanium dioxide nanotubes with the aqueous solution of the metal oxide to form a mixture; adjusting a pH value of the mixture with a weak base until the pH value is neutral; dispersing the mixture in water and heating the mixture; and filtering the mixture to retain a solid part, and calcining the solid part under a continuous flow of oxygen to form metal oxide loaded titanium dioxide nanotubes. The disclosure also provides a sensor material and a detecting method using the sensor material for ppm-ppb-ppt concentration level detection of molecular contaminants. | 01-17-2013 |
| 20130052741 | DYE COMPOSITIONS - Dye compositions comprising rhodizonate dye particles encapsulated within a shearable hydrophobic organic encapsulant composition. | 02-28-2013 |
| 20130059391 | TEST PIECE FOR HEAVY METAL ION, PROCESS FOR DETECTING HEAVY METAL ION, KIT AND SENSOR - The invention provides a test piece for detecting heavy metal ions in an aqueous system to be detected, comprising a substrate, a polymer coating layer and a layer of heavy metal ion-detecting agent, wherein the polymer coating layer is provided such that the surface of the test piece is hydrophobic. The invention further provides a process for detecting heavy metal ions in an aqueous system, a kit comprising the heavy metal ion test piece and a sensor. A portable test piece and/or a device can be provided by the test piece according to the invention, so as to detect the heavy metal ions in a convenient, efficient and rapid manner. | 03-07-2013 |
| 20140134744 | DETECTION DEVICE FOR MOLTEN METAL - A detection device for molten metal is provided. The detection device includes a sample cup having a cavity configured to receive a sample of molten metal and a blob arranged in the cavity. The blob includes a carbide stabilizing element and a hydrogen releasing material including a hydroxide of an alkaline earth metal. The blob is provided for use in detecting phase change temperatures during solidification of a sample of molten cast iron. The blob is also resistant to moisture gain and moisture loss during transport and storage. A method of detecting phase change temperatures of the molten iron or molten cast iron sample using the blob and a method of manufacturing the blob are also provided. | 05-15-2014 |
| 20150031137 | WASTE WATER DISCHARGE APPARATUS AND PROCESS - A process of monitoring a waste stream for metal levels and metal precipitating agent levels is provided. | 01-29-2015 |
| 20150037897 | METHOD OF ANALYZING A SAPPHIRE ARTICLE - A method of removing material from a sapphire article is described. In particular, the method comprises the step of providing an initial sapphire layer and reducing the thickness of the layer while not significantly increasing the surface roughness of the layer, Cover plates for electronic device and methods of preparing them are also disclosed, along with a method of analyzing a sapphire article produced by the present method. | 02-05-2015 |
| 20150056709 | METHOD FOR CHARACTERIZATION OF THE RATE OF MOVEMENT OF AN OXIDATION FRONT IN CEMENTITIOUS MATERIALS - Disclosed are methods for determining the redox condition of cementitious materials. The methods are leaching methods that utilize a redox active transition metal indicator that is present in the cementitious material and exhibits variable solubility depending upon the oxidation state of the indicator. When the leaching process is carried out under anaerobic conditions, the presence or absence of the indicator in the leachate can be utilized to determine the redox condition of and location of the oxidation front in the material that has been subjected to the leaching process. | 02-26-2015 |
| 20150079686 | METHOD OF RESOLVING HEAVY METAL CONTAMINATION SOURCE BASED ON SEQUENTIAL EXTRACTION SCHEME AND ISOTOPE ANALYSIS SCHEME - Disclosed is a method of resolving a heavy metal contamination source based on a sequential extraction scheme and an isotope analysis scheme. Pb isotopes are eluted at 5 types of “cation exchange fraction”, “carbonate fraction”, “iron-oxide and manganese hydroxide-fraction”, “organic matters and sulfide fraction”, and “residual fraction” existing at other types and separated from each other in each step. The Pb isotopes are analyzed and the origins of the Pb isotopes are specified in each step. The contamination source of the Pb isotope including | 03-19-2015 |
| 20150346088 | METHOD AND APPARATUS FOR JUDGING POLISHING PERFORMANCE OF POLISHING LIQUID - A method for judging polishing performance of a polishing liquid, which can judge freshness of a slurry by measuring a component concentration or a physical quantity corresponding to the component concentration of the slurry after polishing and by evaluating an accelerator component and an inhibitor component of the slurry is disclosed. The polishing performance judging method of a polishing liquid judges polishing performance of a polishing liquid containing an accelerator for promoting dissolution of an object to be polished and an inhibitor for inhibiting dissolution of the object to be polished. The method includes analyzing a polishing waste liquid by spectroscopy, selecting a plurality of wavelengths from wavelengths which can distinguish the accelerator, the inhibitor, and a complex compound of the accelerator and a metal to be polished, and measuring absorbance at the selected plurality of wavelengths to thereby judge the polishing performance of the polishing liquid. | 12-03-2015 |
| 20150355156 | METHODS AND APPARATUS FOR DETECTING METALS IN LIQUIDS - Method and apparatus for detecting metals in a liquid are described. The liquid is contacted with a hexahydrotriazine and/or a hemiaminal material, and a UV absorption spectrum of the material before and after exposure to the liquid is examined to determine whether metals are present in the liquid. | 12-10-2015 |
| 20150369746 | CHEMOSENSORS, COMPOSITIONS AND USES THEREOF - Novel Zr-based metal-organic framework (MOF) chemosensors useful for detection, recognition, removal, and separation of heavy metals are provided. Also provided are methods for preparation of the chemosensors and processes for detection, recognition, removal, and separation of heavy metals using the chemosensors. | 12-24-2015 |
| 20160033466 | APPARATUS AND METHOD FOR THE CHARACTERIZATION OF RESPIRABLE AEROSOLS - An apparatus for the characterization of respirable aerosols, including: a burn chamber configured to selectively contain a sample that is selectively heated to generate an aerosol; a heating assembly disposed within the burn chamber adjacent to the sample; and a sampling segment coupled to the burn chamber and configured to collect the aerosol such that it may be analyzed. The apparatus also includes an optional sight window disposed in a wall of the burn chamber such that the sample may be viewed during heating. Optionally, the sample includes one of a Lanthanide, an Actinide, and a Transition metal. | 02-04-2016 |
| 20160187312 | METHOD OF RESOLVING CONTRIBUTION RATIO TO SOIL CONTAMINATION BY PLURALITY OF POLLUTERS THROUGH SEQUENTIAL EXTRACTION SCHEME AND STABLE ISOTOPE ANALYSIS SCHEME - In a method of resolving a contribution ratio to soil contamination by a plurality of polluters through a sequential extraction scheme and a stable isotope analysis scheme, Pb stable isotopes are eluted at 5 types of “cation exchange fraction”, “carbonate fraction”, “iron-oxide and manganese hydroxide-fraction”, “organic matters and sulfide fraction”, and “residual fraction” existing at other types and separated from each other in each step. The Pb stable isotopes obtained in each step are analyzed. | 06-30-2016 |
