36 results about "Glow Discharge Mass Spectrometry" patented technology

The present invention provides compositions and a novel high-yielding process for preparing high purity Group III nitrides. The process involves heating a Group III metal and a catalytic amount of a metal wetting agent in the presence of a nitrogen source. Group III metals can be stoichiometrically converted into high purity Group III nitride powders in a short period of time. The process can provide multi-gram quantities of high purity Group III nitrides in relatively short reaction times. Detailed characterizations of GaN powder were preformed and are reported herein, including morphology and structure by SEM and XRD, optical properties by cathodoluminescence (CL), and Raman spectra to determine the quality of the GaN particles. The purity of GaN powder was found to be greater than 99.9% pure, as analyzed by Glow Discharge Mass Spectrometry (GDMS). Green, yellow, and red light emission can be obtained from doped GaN powders.

The invention discloses a pre-test treatment method of a high-purity indium sample for glow discharge mass spectrometric detection. According to the method, firstly, the to-be-tested high-purity indium sample is subjected to ultrasonic corrosion, then the corroded sample is subjected to ultrasonic cleaning and blow-drying sequentially, and the blow-dried sample is placed between two non-metallic hard plates; an external force is applied to the upper non-metallic hard plate, so that a plane is generated at the bottom of the sample after the sample is extruded; the external force continues to beapplied to the upper hard plate till the plane at the bottom of the sample is gradually enlarged to a size required by a glow discharge mass spectrometric test, and then application of the external force is stopped; and the flaky sample between the two non-metallic hard plate is taken out, cleaned and blow-dried, and then a to-be-tested sample sheet meeting the test demand is obtained. Compared with a traditional pre-test treatment method, the method is simple, easy to implement, free of impurity introduction and pollution to the sample and low in cost; and through the method, the time of theglow discharge mass spectrometric detection is shortened, the detection speed is increased, and the practical value is high.

The invention relates to a method for preparing a high-pure-cobalt solution through stirring and extraction, and belongs to the technical field of preparing a metal material. The method comprises: preparing a cobalt solution in a high-level extraction tank; adding sulfonated kerosene, a P507 extractant, and sodium hydroxide in a low-level extraction tank, performing stirring for saponification, and pumping the obtained product into the high-level extraction tank for stirring and extraction to enable cobalt in the cobalt solution extracted into an organic phase; adding hydrochloric acid to wash the loading organic phase while performing stirring, and performing back extraction to prepared a cobalt-rich liquid; adding a macroporous adsorption resin for deep purification, and performing condensation and electrolytic deposition; and performing vacuum melting of electrolytic deposited cobalt to obtain a high-pure cobalt ingot. The purity of the high-pure cobalt ingot is analyzed by glow discharge mass spectrometry, and the purity of more than 70 kinds of elements in the cobalt ingot is more than 99.999%. According to the invention, high selectivity of liquid-liquid extraction and properties, such as turbulence and shear force, of stirring are combined to enhance the reaction process and to improve the purification capability of the cobalt solution. The method is simple, and is easy to operate and low in cost. Processes in the method are relatively independent, so that the method is high in flexibility. Chemical materials are less in consumption, and the equipment is high in productivity, so that the method benefits scale production.

The present invention provides a cage-shaped sampling device and a sample testing method for glow discharge mass spectrometry analysis, so as to solve the problem of analyzing samples of different types and sizes by glow discharge mass spectrometry (GD-MS). The cage-like sampling device comprises a cage-like metal tank and a metal handle arranged at one end of the cage-like metal tank, and the metal handle is used to fix the cage-like sampling device relative to the glow discharge mass spectrometer, and the cage The other end of the cage-shaped metal tank has a sample loading port to load and take out samples. The cage-shaped metal tank is prepared by punching holes on a metal sheet with a purity greater than 99.995%. The size of the cage-shaped metal tank is smaller than the The size of the glow discharge cell of the glow discharge mass spectrometer cannot be placed in the glow discharge cell, and the volume of the cage-like metal tank is smaller than that of the glow discharge cell.