Resonance Rayleigh scattering (RRS) method for measuring bromide ion

A technology of resonance Rayleigh scattering and analyte, applied in the field of analytical chemistry, to achieve the effect of good selectivity, high sensitivity and easy operation

Inactive Publication Date: 2014-02-26
GUANGXI NORMAL UNIV
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Problems solved by technology

To the best of our knowledge, no method for the detection of bromide ions using resonance Rayleigh scattering spectroscopy has been reported

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  • Resonance Rayleigh scattering (RRS) method for measuring bromide ion

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Embodiment

[0017] Determination of Br by Resonance Rayleigh Scattering Spectrometry - , including the following steps:

[0018] (1) Preparation of Br - Standard solution system: take a 5 mL graduated test tube, pipette 1, 10, 20, 50, 100 μL 1.0 μg / mL Br - Standard solution, 75 μL 1.0×10 -5 mol / L fluorescein, mix well, add 150 μL 0.160 mol / L H 2 o 2 , then add 200 μL 3.0 mol / L HCl, distill the volume to 2.0 mL with twice distilled water, mix well, let stand for 40 min, add 500 μL 500 g / L NH 4 AC, stand for 5min;

[0019] (2) Prepare the blank control solution system: use the method of step (1) without adding Br - Prepare blank control solution system with standard solution;

[0020] (3) Take the Br prepared by steps (1) and (2) respectively - The standard solution system and the blank control solution system are appropriate, placed in a cuvette, and on the fluorescence spectrophotometer, the excitation wavelength and emission wavelength are scanned synchronously to obtain the res...

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Abstract

The invention discloses a resonance Rayleigh scattering (RRS) spectrum method for measuring Br<->. The RRS spectrum method comprises the following steps: (1) preparing a Br<-> standard solution system; (2) preparing a blank control solution system; (3) respectively measuring an RRS peak intensity value Istandard and an RRS peak intensity value Iblank of the Br<-> standard solution system and the blank control solution system and computing deltaI=Istandard-Iblank; (4) working out a working curve according to the concentration relation between deltaI and Br<->; (5) measuring a sample of a measured material and computing deltaIsample=Isample-Iblank; and (6) checking the working curve in the step (4) according to the measured deltaIsample of the sample and computing the content of Br<-> in the measured material. The measurement method has the advantages of simple instruments, quickness in operation, high sensitivity and good selectivity.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to the resonance Rayleigh scattering spectrometry for determining bromide ions. Background technique [0002] Bromine is a trace element that widely exists in nature and is necessary for human body. According to reports, the lack of bromide ions will slow down the growth of animals, and at the same time cause skin rashes, bromide poisoning, central nervous system failure, mental deterioration and acne and other diseases, such as bromide ions (Br - ) concentrations are often low; bromide ions also play an important role in sewage treatment and oil search. However, the analysis of bromide ions has always been a relatively weak research topic, especially for the determination of low-content bromine. In recent years, with the enhancement of environmental ecological awareness, Br - More and more attention has been paid to the environmental effects and nutritional functions of In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 蒋治良叶玲玲梁爱惠
Owner GUANGXI NORMAL UNIV
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