7 results about "Polyatomic ion" patented technology

The invention relates to the technical field of instruments and meters, in particular to an inductively coupled plasma mass spectrometer system for intelligent data processing and report generation. Comprising a sample introduction unit, a plasma excitation and ionization unit, a mass analyzer and detection unit, a vacuum system unit and an intelligent data processing and report generation unit. Efficient ionization is achieved through a bipolar radio frequency switching and AI optimized reaction gas plasma source, the AI optimization module monitors in real time and dynamically adjusts parameters so that the ionization efficiency can be stabilized at 92% + / -2%, and meanwhile a reaction gas control system can optimize plasma conditions to suppress interference ions. And the mass analyzer and the detection unit realize high-precision ion separation by utilizing AI interference correction and a QMS-TOF double analyzer mode, and an interference elimination module can automatically eliminate polyatomic ion interference, so that the ionization efficiency, the analysis precision and the accuracy are improved, the interference is effectively inhibited, and the analysis capability of the system on a complex sample is enhanced.

The invention discloses a method for detecting the content of trace metal ions in a diazo naphthoquinone photosensitizer. The method comprises the following steps: sample pretreatment: weighing diazonaphthoquinone photosensitizer powder in a clean room, putting the diazonaphthoquinone photosensitizer powder into a cleaned and dried wide-mouth PFA bottle, adding an organic reagent, and carrying out ultrasonic treatment until a solid is completely dissolved; the method comprises the following steps: testing: adding a metal standard substance into an organic solvent to prepare three standard solutions with different concentrations; debugging an instrument, determining target metal in the standard solution in a Cool mode, a No Gas mode and a He mode by using an inductively coupled plasma mass spectrometer to obtain a signal intensity value (CPS value) corresponding to each metal ion concentration in the standard solution, and establishing a standard curve; and measuring the sample in which the photosensitizer is dissolved by using the same steps to obtain the content of metal ions in the sample. According to the method, appropriate detection conditions are optimized for different elements to be detected in the diazo naphthoquinone photosensitizer, polyatomic ion interference and matrix effect in a sample are mainly reduced, the content of 16 metal ions can be accurately detected at the same time, and the test efficiency is high.

This invention relates to the field of analytical chemistry, and discloses an isotope dilution-bismuth reagent-LA-ICP-MS method for the determination of noble metals. The method involves adding geochemical samples to bismuth reagent kits... 194 Pt isotope diluent was mixed with a silver carrier, and then melted and blown to obtain silver alloy particles. The silver alloy particles were annealed and pressed into silver sheets. The content of Pt in the silver sheets was determined by LA-ICP-MS. 105 Pd, 195 Pt and 197 The mass spectrometry intensity of Au was determined by adding platinum isotope diluent. 194 Pt was used as an internal standard for signal correction; the contents of gold, platinum, and palladium in the sample were calculated based on the measurement results. This invention utilizes solid-state injection of prepared Ag sheets and multi-point ablation by LA-ICP-MS, improving the analysis speed and avoiding interference from polyatomic ions and dilution effects in the solution; the added platinum isotope diluent... 194 Pt, as an internal standard, is consistent with the distribution trend of the element to be measured, thus solving the problem of uneven element distribution in Ag tablets. Ag tablets prepared with standard substances serve as a standard series with consistent matrix. The standard curve is plotted using the empirical coefficient method, showing good linearity.

The invention discloses a method for determining trace metal impurities in electronic-grade hydroxylamine, which comprises the following steps: diluting a hydroxylamine sample by preparing a composite extracting solution which has a pH value of 5.5 + / -0.2 and contains ammonium citrate, ammonium acetate and EDTA (Ethylene Diamine Tetraacetic Acid), effectively inhibiting hydroxylamine decomposition and stabilizing metal ions, and determining trace metal impurities in electronic-grade hydroxylamine by combining a triple quadrupole inductively coupled plasma mass spectrometry technology. The interference of polyatomic ions is eliminated by utilizing the cooling atomization and dynamic reaction tank functions, and finally, quantification is performed by adopting a matrix-matched standard curve method. The method solves the technical problems of low metal ion detection recovery rate and poor accuracy caused by chemical instability of electronic-grade hydroxylamine, has the advantages of safety in operation, high sensitivity, stable recovery rate and the like, and provides a reliable analysis means for quality control of key chemicals in a semiconductor manufacturing process.

The invention relates to the technical field of geochemical analysis, in particular to a zircon zirconium isotope detection method, which comprises the following steps: co-loading a zircon sample to be detected and a standard sample with a coherent growth structure; a femtosecond laser system integrated with laser-induced breakdown spectroscopy is used for performing real-time component sensing and dynamically adjusting laser parameters so as to realize intelligent denudation, generated aerosol is ionized by a series quadrupole rod inductively coupled plasma mass spectrometer, and interference is eliminated through two-stage mass screening and chemical reaction in a reaction tank; and a multi-receiver array is adopted to synchronously detect signals, and finally, multi-source data are fused and input into a pre-trained machine learning model for intelligent correction, so that the problems that polyatomic ion interference is serious, the matrix effect is remarkable, and high spatial resolution and analysis precision are difficult to consider at the same time are effectively solved. And high-precision and high-accuracy micro-area in-situ analysis of the zircon zirconium isotope is realized.

A composition of matter having the following chemical structure:[Hx⁢O(x-1)2]⁢Zywherein x is an odd integer ≥3;y is an integer between 1 and 20; andZ is one of a monoatomic ion from Groups 14 through 17 having a charge value between −1 and −3 or apolyatomic ion having a charge between −1 and −3.

The application discloses a method for determining silicon element in glass by ICP-MS CRC technology, which comprises four steps of sample pretreatment, instrument condition optimization, interference elimination verification and quantitative analysis: the glass sample is treated by a microwave digestion method or a melting method to avoid the introduction of interference by a chlorine-containing reagent; ICP-MS CRC reaction cell conditions are optimized, O2 or H2 is selected as a reaction gas, the flow rate is set to 0.3-0.7 ml / min, the cell pressure is set to 1.0-1.5 mbar, and 29Si+ is selected as a monitoring ion; the interference elimination effect is verified by a full scanning mode and a standard solution; and a standard curve is drawn and the silicon concentration is calculated. By using the method, the interference of polyatomic ions is effectively eliminated, the silicon detection limit is as low as 0.1 ppb, the detection accuracy is improved by more than 90%, and the method has the advantages of wide applicability, simple operation and reliable data, and can be used for accurate detection of trace silicon in glass and semiconductor material complex matrix samples.