8 results about "Atomic emission spectrometry" patented technology

This utility model relates to the field of inductively coupled plasma atomic emission spectrometry (ICP-AES) and discloses a sample preparation device for ICP-AES. This utility model solves the problems of insufficient mixing, inconvenient reagent addition, environmental pollution, and easy loss of analytes in existing digestion and acid removal processes for samples such as molybdenum ore. In this device, the stirring paddle precisely controls its rotation speed based on real-time feedback from viscosity and density sensors on the inner wall of the digestion vessel. Combined with reagent addition tubes of different diameters and a reliable sealing structure, it achieves accurate and safe reagent addition, improving digestion efficiency and operational convenience. The acid removal cylinder features a surrounding electric heating wire combined with multi-position temperature sensors for precise temperature control. The suction fan and activated carbon adsorption layer effectively purify acid mist, ensuring efficient acid removal, preventing loss of analytes, reducing laboratory environmental pollution, and laying a solid foundation for subsequent accurate determination.

Resin microparticles with reduced metallic and leached ion content and excellent dielectric properties are provided. Furthermore, a method for manufacturing such resin microparticles is provided. The resin microparticles of embodiments of the present invention have a total content of component A of less than 100 ppm as determined by inductively coupled plasma atomic emission spectrometry, a total content of leached ion component B of less than 100 ppm as determined by ion chromatography, and a dielectric loss tangent of 0.0050° or less at a frequency of 10 GHz. Component A includes Al, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, P, S, Si, Sr, and Zn. Ionic component B includes fluoride ions, chloride ions, nitrite ions, bromide ions, nitrate ions, phosphate ions, and sulfate ions.

Inductively coupled plasma (ICP) analyzers use an ICP torch to generate plasma in which the sample is atomized and ionized. Analysis of the atomic ions can be performed using atomic analysis, such as mass spectrometry (MS) or atomic emission spectrometry (AES). Particle-based ICP analysis involves analyzing particles (e.g., cells, magnetic beads, or laser ablation plumes) by atomizing and ionizing them in an ICP torch chamber followed by atomic analysis. In mass cytometry, the mass tags of the particles are analyzed using mass spectrometry, such as ICP-MS. The systems and methods of this application include one or more of the following: a removable ICP torch holder assembly, an external ignition device, an ICP induction coil including annular fins, a particle-suspended sample introduction jet, and its ICP analyzer.

The present invention relates to a process cartridge. A process cartridge detachably mounted to a main body of an electrophotographic apparatus, wherein a surface protective layer of an electrophotographic photosensitive member contains electrically conductive particles; a content of the electrically conductive particles is 20.0 to 70.0 vol% of the surface protective layer; a volume resistivity of the surface protective layer is 1.0 x 10 9 to 1.0 x 10 14 Ω·cm; toner particles have at least one multivalent metal element selected from the group consisting of aluminum, magnesium, calcium, and iron; and a total content of the multivalent metal elements in the toner particles is 0.10 to 1.25 μmol / g as measured by inductively coupled plasma atomic emission spectrometry (ICP-AES).

This application provides a method for phase analysis of manganese in ores, belonging to the field of phase analysis of ores. The method involves weighing an ore sample and sequentially leaching it with silver nitrate solution to separate the manganese sulfate phase; then leaching it with aluminum nitrate solution under heating, adding a mixed solution of isoamyl alcohol and isoamyl acetate as a first inhibitor to separate the manganese carbonate phase; followed by stepwise leaching with sulfurous acid solution and hydroxylamine sulfate-sulfuric acid solution, adding a mixed solution of n-butanol and ethyl acetate as a second inhibitor to separate the manganese oxide phase; and finally, the remaining residue is digested by ashing to obtain the silicate phase. The manganese content of each phase digest is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). This application rationally selects various possible forms of manganese in the ore and scientifically selects the leaching agent for each phase, ensuring that the leaching agent of the previous phase does not leach manganese from the subsequent phases, thus guaranteeing accurate determination of each phase.

The application discloses a measurement method and system for heavy metal content of Chinese traditional medicine herba potentillae discoloris, and the measurement method comprises the following steps: pretreating the Chinese traditional medicine herba potentillae discoloris, and realizing effective enrichment and preliminary purification of target heavy metal ions in the herba potentillae discoloris by using a microwave digestion-turbid point extraction technology; determining optimal spectral experimental parameters of inductively coupled plasma atomic emission spectrometry by using a response surface method; investigating and eliminating ion interference and acid interference generated after microwave digestion-turbid point extraction of the herba potentillae discoloris sample; after removing the interference of the herba potentillae discoloris sample solution obtained by using the microwave digestion-turbid point extraction technology, the inductively coupled plasma atomic emission spectrometry is used to determine the target heavy metal content in the herba potentillae discoloris; and the accuracy of the metal content determination method is verified according to the Chinese Pharmacopoeia. The application improves the sensitivity and accuracy of the heavy metal content analysis method of the Chinese traditional medicine.

This invention relates to the field of chemical technology and discloses a method for testing the noble metal content in a silicon-based noble metal catalyst. The method includes: (1) evaporating a solvent from a mixture containing a silicon-based noble metal catalyst, water, hydrofluoric acid, and aqua regia to obtain a solid phase; (2) contacting the solid phase obtained in step (1) with nitric acid to obtain a sample digestion solution; (3) testing the response signal intensity of the noble metal in the sample digestion solution using inductively coupled plasma atomic emission spectrometry; (4) preparing a noble metal standard solution, testing the noble metal response signal intensity of the noble metal standard solution according to the method in step (3), fitting a standard curve, and substituting the response signal intensity from step (3) into the standard curve to calculate the noble metal content. This method has high testing accuracy and good stability.

This application relates to a method for detecting the metal content in fluororubber, comprising the following steps: S1: subjecting a fluororubber sample to a first carbonization treatment and a second ashing treatment in a muffle furnace to obtain a treated fluororubber sample; S2: adding acid to the sample treated in step S1 to obtain a metal solution to be tested; S3: detecting the metal content in the metal solution to be tested using inductively coupled plasma atomic emission spectrometry (ICP-AES). This application completely burns the fluororubber using a muffle furnace ashing method, then dissolves the metal in the fluororubber by heating with nitric acid solution. The concentration of the metal element in the treated sample is then determined using an ICP-AES instrument, solving the problem of insufficient extraction of metal elements in sparingly soluble fluororubber and improving the quantitative accuracy.