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Elemental analysis determination method and device

A technology of elemental analysis and determination method, applied in the field of instrumental analysis, to achieve the effect of sharp peak shape, accurate determination results, and improved sample heating and pyrolysis rate

Inactive Publication Date: 2014-05-14
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Elemental analysis determination method and device

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Embodiment 1

[0060] A determination method for elemental analysis, which is characterized in that an inorganic compound that can release hydrogen during cracking is added to the sample to be tested to make it evenly mixed with the sample, and then the mixture is cracked at a temperature of 800 ° C, so that the elements form volatile Atomic spectrometer measurement; the inorganic compound that releases hydrogen by cracking refers to: sodium hydrosulfide or hydrogen iodide; wherein the weight of the added inorganic compound is 15 times of the sample weight. The measured elements refer to: arsenic, mercury, antimony, bismuth, selenium, germanium, tin, lead and tellurium.

[0061]

Embodiment 2

[0063] A determination method for elemental analysis, adding an inorganic compound that can release hydrogen during cracking to the sample to be tested to make it evenly mixed with the sample, and then cracking the mixture at a temperature of 600 ° C to make the elements form volatiles and be measured by atomic spectrometer ; The inorganic compound that releases hydrogen by cracking refers to: sodium hydrosulfide; wherein the weight of the added inorganic compound is 35 times the weight of the sample. The measured elements refer to: arsenic, mercury, antimony, bismuth, selenium, germanium, tin, lead and tellurium.

Embodiment 3

[0065] A determination method for elemental analysis, adding an inorganic compound that can release hydrogen during cracking to the sample to be tested to make it evenly mixed with the sample, and then cracking the mixture at a certain temperature, so that the elements form volatiles and are measured by an atomic spectrometer; The inorganic compound that decomposes and releases hydrogen refers to: potassium hydrogen sulfide or hydrogen sulfide; wherein the weight of the added inorganic compound is 50 times the weight of the sample. The measured elements refer to: arsenic, mercury, antimony, bismuth, selenium, germanium, tin, lead and tellurium. The crucible or foil filled with the sample during lysis can hold a sample weight of 20 mg.

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Abstract

The invention discloses an elemental analysis determination method and device. The elemental analysis determination method comprises the following steps: adding an inorganic compound capable of releasing hydrogen in pyrolysis into a to-be-detected sample and mixing the inorganic compound with the sample uniformly; carrying out pyrolysis on the mixture at a certain temperature, enabling an element to form a volatile matter, and determining the volatile matter by an atom spectrogram, wherein the inorganic compound for releasing hydrogen in pyrolysis is sodium bisulfide, potassium hydrogen sulfide, ammonium sulfide, ammonia hydrogen sulfide, ammonium iodide, hydrogen sulfide or hydrogen iodide, and the weight of the added inorganic compound is 0.2-100 times the weight of the sample. According to the invention, an inorganic hydrogen release reagent and a curie point pyrolyser are used, and the advantages of low analysis cost, less interference, high element volatile matter formation speed, high sampling efficiency of to-be-detected elements and the like are realized, and the method is a rapid and accurate analysis method.

Description

technical field [0001] The invention belongs to the technical field of instrumental analysis, and in particular relates to a method and a device for generating volatiles from elements during element determination. Using this method, elements can be formed into volatiles for sample entry and determination. Background technique [0002] Element determination is widely used in materials, food, environment, agriculture, chemical industry, geology and minerals and other industries, and belongs to one of the two major categories of analysis and testing industries. The qualitative and quantitative analysis of element content in various samples has already become the eyes of various industries and is of great significance. [0003] At present, the detection of elements in samples in various industries mainly uses atomic spectrometers, including atomic absorption spectrophotometer (AAS), atomic fluorescence spectrometer (AFS), inductively coupled plasma atomic emission spectrometry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N1/44
Inventor 段旭川
Owner TIANJIN NORMAL UNIVERSITY
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