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Electrochemical method for measuring aluminium

An electrochemical and electrolyte technology, which is applied in the direction of material electrochemical variables, can solve the problems that the electrochemical behavior of aluminum and dopamine has not been reported, and achieve the effects of overcoming fatal shortcomings, renewable surfaces, and good reproducibility

Inactive Publication Date: 2008-11-26
NANJING UNIV
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Problems solved by technology

In recent years, there are also related studies on the relationship between catechols and other metal ions such as Fe III 、 Ge IV 、Bi III , Pb II 、Co II 、Cd II The interaction between aluminum and dopamine on the mercury electrode has been reported, but the electrochemical behavior of aluminum and dopamine on the mercury electrode has not been reported so far

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  • Electrochemical method for measuring aluminium
  • Electrochemical method for measuring aluminium
  • Electrochemical method for measuring aluminium

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Embodiment Construction

[0016] The invention adopts a three-electrode system: a suspended mercury electrode is a working electrode, a platinum sheet electrode is a counter electrode, and a saturated calomel electrode is a reference electrode. The analysis and determination were carried out on the BAS-100B electric analyzer of BAS Company in the United States. The linear single scan parameters are: scan rate 100mV / s. 79-1 magnetic heating stirrer (Guohua Instrument Factory). SPM-10A digital acidity meter (Zhejiang Xiaoshan Instrument Factory). 501 type super thermostat (Shanghai Experimental Instrument Factory).

[0017] Dopamine (99%, Swiss company Acros Organics), high-purity aluminum powder (imported packaging), purity 99.99%. The 0.01M aluminum stock solution is made of high-purity aluminum powder dissolved in an appropriate amount of concentrated hydrochloric acid, diluted to 100 ml, and then diluted when used. Buffer solution: 0.08-0.2M, pH8.0-9.8 by NH 3 ·H 2 O and NH 4 Cl is prepared in...

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Abstract

This invention relates to an electrochemical method for measuring aluminium. By the linear relation between reducing peak-to-peak current on Hg-electrode produced by AlIII-dopamine and the AlIII concentration, setting the measurement condition as pH 8.2-10, concentration of dopamine more than 1*10-3M, and alkali buffer of NH3 .H2O and NH4Cl; applying the linear equation as ipc( muA)=0.1343+1.513*104CAlIII(M); selecting the measurement range as 2.0*10-6-7.6*10-5M with R=0.9989. This invention overcomes the defects in atomic absorption spectrometry and adsorption voltammetry.

Description

technical field [0001] The invention relates to a method for electrochemically measuring aluminum, especially using Al on a suspended mercury electrode III A method for the determination of aluminum content by analyzing the electrochemical behavior of dopamine. Background technique [0002] The relationship between trace elements and human health is a hot topic in bioinorganic chemistry. Aluminum is a non-essential element for the human body, and the relationship between trace amounts of aluminum and human health has attracted widespread attention. In recent years, a large number of studies have shown that excessive intake of aluminum can cause brain dysfunction such as Parkinson's disease, Alzheimer's disease and dialysis encephalopathy. Dopamine is an important neurotransmitter in the nervous system, mainly in the substantia nigra in the midbrain, and its deficiency can lead to Parkinson's disease. Therefore study Al III The interaction with dopamine has important guid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 毕树平杨立韩韦英纪鸣张敏徐泉章福平
Owner NANJING UNIV
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