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Catalyst resonance scattering spectrophotometric method capable of measuring ultra-trace rhenium

A technique of resonance scattering and analysis method, which is applied in the measurement of scattering characteristics, etc., can solve the problems of difficulty in popularization, harm to the human body, and low sensitivity, and achieve the effects of simple operation, strong anti-interference, and high sensitivity

Inactive Publication Date: 2011-04-13
GUANGXI NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some of the above methods have low sensitivity and high detection limit, and are not suitable for the determination of extremely low content of rhenium. Some have nuclear radiation and are harmful to the human body. Some of them use expensive instruments and are difficult to popularize.

Method used

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  • Catalyst resonance scattering spectrophotometric method capable of measuring ultra-trace rhenium
  • Catalyst resonance scattering spectrophotometric method capable of measuring ultra-trace rhenium

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Experimental program
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Effect test

Embodiment Construction

[0019] (1) Prepare a test system with known rhenium concentration: pipette 0.3mL of 0.012M sodium tellurate, 0.20mL of 0.3M tartaric acid, a certain amount of ammonium perrhenate, and 0.7mL of 0.9M tin dichloride in sequence. 5.0mL graduated test tube, set the volume to the 3mL mark, and put it in a constant temperature water bath at 70°C for 10 minutes;

[0020] (2) prepare the blank control system without adding rhenium with the method of step (1);

[0021] (3) Take an appropriate amount of the above systems in different quartz cells, and place them on the CARY ECLIPSE fluorescence spectrophotometer to scan the excitation wavelength λ synchronously ex and emission wavelength λ em (λ ex =λ em ), the excitation and emission slits are 5.0nm, and the measurement voltage is 450V, obtain the resonance scattering spectra of the two systems, measure the resonance scattering light intensity at the 778nm place, and the known rhenium concentration system is I 778nm , do not add rhe...

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Abstract

The invention discloses a catalyst resonance scattering spectrophotometric method capable of simply and quickly measuring ultra-trace rhenium. The generated tellurium particle concentration increases along with the reinforced catalytic action due to catalyst concentration increase by using stronger catalyst action of rhenate to tellurium(VI)- tin dichloride reaction in 70 DEG C water bath, therefore 778nm resonance scattering intensity shows a linear incline and in a certain concentration range, concentration is in linear relationship with resonance scattering intensity, thus a catalyst resonance scattering spectrophotometric method capable of simply and quickly measuring ultra-trace rhenium is established. Compared with the prior method, the method has features of simple device, simple operation, high sensitivity, good selectivity, simple reaction condition.

Description

technical field [0001] The invention relates to a method for measuring ultra-trace rhenium, in particular to a catalytic resonance scattering spectroscopic analysis method capable of rapidly measuring ultra-trace rhenium. Background technique [0002] Rhenium is a rare rare metal element, which is found in very small amounts in the earth's crust. Rhenium has high hardness, corrosion resistance, wear resistance and good ductility. It is widely used in national defense and aerospace, ultra-high temperature emission, and thermionic materials for special lamps. At present, the determination methods of rhenium mainly include photometry, polarography, neutron activation analysis (NAA), surface plasma-mass spectrometry (ICP-MS), negative ion thermal surface ionization mass spectrometry (NTIMS) and so on. Some of the above methods have low sensitivity and high detection limit, which are not suitable for the determination of extremely low content of rhenium, some have nuclear radiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/51
Inventor 蒋治良范燕燕廖献就李建福
Owner GUANGXI NORMAL UNIV