Method for simultaneously determining contents of various rare metal elements in incineration ash

A technology of rare metal elements and incineration ash, which is applied in the direction of measuring devices, preparation of test samples, improvement of process efficiency, etc., can solve the problems of high determination limit of elements and complicated treatment methods, so as to achieve high mass abundance and avoid Precipitation formation, effect of avoiding losses

Pending Publication Date: 2022-08-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method for simultaneously measuring the content of various rare metal elements in incineration ash, which solves the problem of high element determination lower limit and pretreatment method for mass spectrometry test element interference elimination in the prior art Complicated and unreliable for simultaneous measurement of multiple key rare metal elements in incineration ash

Method used

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  • Method for simultaneously determining contents of various rare metal elements in incineration ash
  • Method for simultaneously determining contents of various rare metal elements in incineration ash
  • Method for simultaneously determining contents of various rare metal elements in incineration ash

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preparation example Construction

[0060] The same preparation steps are adopted as the test sample on the machine, the difference is that the sample to be tested is not added during the preparation process, and then a blank sample is obtained.

[0061] Under the above-mentioned instrument working conditions and working setting parameters, the calibrated and optimized ICP-MS / MS is used to test the above-mentioned test samples and blank samples, and the target Rh and Re internal standards are added online during the test. solution to obtain the elemental test concentration c, and the elemental test concentration c in the blank sample 0 , the formula for calculating the rare metal content C is:

[0062]

[0063] Among them, c is the element concentration directly determined by ICP-MS / MS, m is the digestion mass of the sample, v is the constant volume volume, c 0 is the blank sample concentration.

[0064] When the sample volume is large, especially when there are more than 10 samples, a standard addition rec...

Embodiment 1

[0066] 1. Experimental instruments and reagents

[0067] Triple quadrupole inductively coupled plasma tandem mass spectrometer: Thermo Scientific iCAP TQ ICP-MS from Thermo Fisher, USA, the element to be tested in the sample passes through the first quadruple after atomization, desolvation, evaporation, atomization and ionization Rod mass filter Q1, uses the restriction of Q1 to restrict the ions entering the collision / reaction cell Q2, filters out unnecessary non-target ions in advance, and reduces the generation of side reactive ions and cluster reactive ions; then enters the collision / reaction cell Q2 and then collides reaction, directly inhibiting the signal of the interferer by dissociating or transferring the interferer (such as He-KED mode, TQ-O 2 on mass mode and TQ-H 2 on mass mode), or convert disturbed analyte ions into undisturbed or less disturbed polyatomic ions (such as TQ-O 2 mass shift mode and TQ-NH 3 mass shift mode); the ions after the collision reactio...

Embodiment 2

[0103] Other steps are the same as in Example 1, except that 65% HNO is used for digestion 3 Parallel digestion of 3 standard gray samples

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Abstract

The invention belongs to the related technical field of element content determination, and discloses a method for simultaneously determining the content of multiple rare metal elements in incineration ash, and the method comprises the following steps: mixing a sample to be detected, aqua regia and a hydrofluoric acid solution, putting the mixture into a graphite digestion tank, digesting, and filtering to obtain a sample for testing on a machine; the ICP-MS / MS is calibrated and optimized by using the tuning liquid; the calibrated and optimized ICP-MS / MS is adopted to test the multi-element mixed standard solution, and Rh and Re internal standard solutions are added on line at the same time, so that a working calibration curve of multiple rare metal elements is obtained; the method comprises the following steps: testing a sample for computer testing and a blank sample by adopting calibrated and optimized ICP-MS / MS, and correcting by adopting target Rh and Re internal standard solutions in the testing process, so as to obtain the content of various rare metals. The problems that in the prior art, the element determination lower limit is high, a mass spectrum test element interference elimination pretreatment method is complex, and multiple key rare metal elements of incineration ash cannot be measured at the same time are solved.

Description

technical field [0001] The invention belongs to the related technical field of element content determination, and more particularly relates to a method for simultaneously determining the content of various rare metal elements in incineration ash. Background technique [0002] Strategic key rare metal elements refer to mineral resources including lithium, beryllium, rubidium, cesium, vanadium, gallium, scandium, rare earth, uranium, etc., which are highly used in new energy, new materials, military industry, aerospace, electronic equipment, etc. It has irreplaceable uses in the field of science and technology and modern industry. Different from bulk metal resources such as iron and copper, strategic key metals usually have small reserves, low content and limited sources in nature. Under the background of the "dual carbon" strategy, new energy industries such as wind power generation, energy storage, new energy vehicles and other industries have a high demand for lithium and ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N27/626G01N1/44G01N1/34G01N1/28
CPCG01N27/626G01N1/44G01N1/34G01N1/28Y02P10/20
Inventor付彪姚洪罗光前王娇张浩宇
OwnerHUAZHONG UNIV OF SCI & TECH