Catalytic reaction-resonance scattering spectroscopic method for detecting trace molybdenum

A technology of resonance scattering and catalytic reaction, applied in the measurement of scattering characteristics, etc., can solve the problems of not being widely used, restricting wide use, and high technical requirements, achieving good application value, strong anti-interference, and good selectivity. Effect

Inactive Publication Date: 2009-11-11
GUANGXI NORMAL UNIV
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  • Claims
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Problems solved by technology

But the disadvantage is that the operation is troublesome and the technical requirements for the operator are high
Inductively Coupled Plasma Emission Spectroscopy (ICP-AES) analysis has the advantages of wide linear range, high sensitivity, good precision, simultaneous analysis of multiple elements, and high analysis efficiency, but its expensive instruments limit its wide application
Although atomic absorption spectrophotometry has the advantages of good selectivity, high measurement accuracy, simplicity and speed, it uses the same equipment as ICP-AES analysis method, which is relatively expensive and is not widely used.

Method used

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  • Catalytic reaction-resonance scattering spectroscopic method for detecting trace molybdenum
  • Catalytic reaction-resonance scattering spectroscopic method for detecting trace molybdenum

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Embodiment

[0020] First prepare ①0.9M tin dichloride, weigh 20.3g SnCl 2 2H 2 O was dissolved in 30mL concentrated hydrochloric acid (the concentration of hydrochloric acid was 3.6mol / L); ②0.012M sodium tellurate: weigh 0.33g Na 2 TeO 4 .2H 2 O dissolved in 100mL water; ③1×10 -2 Mo(VI) of M: Weigh 0.242gNa 2 MoO 4 .2H 2 O was dissolved in 100 mL of water, and then serially diluted to obtain 1×10 -5 Mo(VI) of M. The reagents used were of analytical grade, and the experimental water was sub-boiling high-purity water. The specific measurement steps are as follows:

[0021] (1) Prepare the standard system of molybdenum: pipette 0.3mL of 0.012M sodium tellurate, a certain amount of molybdenum ion catalyst, and 0.75mL of 0.9M tin dichloride in a 5.0mL graduated test tube, and set the volume to 3.0mL. Namely Na 2 TeO 4 The concentration of tin dichloride is 1.2mM, and the concentration of tin dichloride is 0.225M, and then placed in a constant temperature water bath at 65°C for 6 mi...

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Abstract

The invention discloses a catalytic reaction-resonance scattering spectroscopic method for detecting trace molybdenum. The method is characterized by including the following steps: (1) preparing a standard molybdenum system; (2) preparing a blank control system; (3) right amount of components are taken to be arranged in a quartz cell and then are put on a fluoro spectrophotometer to be synchronously scanned (lambdaem is equal to lambdaex), the resonance scattering light intensity I540nm of a 540nm part is detected, the blank value of a blank system is I540nmb, and the expression that delta 540nm is equal to 540nm minus I540nmb is calculated; (4) the delta 540nm is used for making the working curve of the concentration relationship of molybdenum; (5) a detection system is prepared according to the method of step one so as to obtain the delta I540nm of a tested object by calculation; and (6) according to the working curve of step four, the concentration of molybdenum of the tested object is calculated. The method has the advantages of high sensitivity, favorable selectivity, simple operation, high safety, non-toxicity, low-cost reagent needed, etc.

Description

technical field [0001] The invention relates to a method for measuring molybdenum, in particular to a catalytic reaction-resonance scattering spectrometry for determining trace molybdenum. Background technique [0002] Molybdenum (Molybdenum) is one of the essential trace elements for the human body. Various tissues of the human body contain molybdenum. The total amount in the adult body is 9 mg, and the content in the liver and kidney is the highest. Molybdenum is a component of a variety of enzymes. Molybdenum enzymes exist in organisms and have anti-cancer and anti-caries effects. Molybdenum deficiency can lead to dental caries, kidney stones, Keshan disease, Kashin-Beck disease, esophageal cancer and other diseases. At the same time, molybdenum is one of the seven micronutrient elements required for plant growth and development. Without it, plants cannot survive. If the available molybdenum content in the soil is too small, the plants will appear molybdenum deficiency s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/49
Inventor 蒋治良覃惠敏凌秀超康彩艳
Owner GUANGXI NORMAL UNIV
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