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Electrochemical detection method for ion pairs formed by Cu2+ and TPB- in water/1,2-dichloroethane system

A dichloroethane, electrochemical technology, applied in the direction of material electrochemical variables, etc., can solve the problems of complex operation and maintenance of the instrument system, high cost of testing, not fast and easy, etc., to improve the detection sensitivity and accuracy, Improved detection accuracy and high sensitivity

Inactive Publication Date: 2012-09-19
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

Usually, methods such as high performance liquid chromatography and fluorescence method are used to detect ion pairs, but these methods are not fast enough, and the operation and maintenance of the instrument system are relatively complicated, and the cost of testing is relatively high.

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  • Electrochemical detection method for ion pairs formed by Cu2+ and TPB- in water/1,2-dichloroethane system
  • Electrochemical detection method for ion pairs formed by Cu2+ and TPB- in water/1,2-dichloroethane system
  • Electrochemical detection method for ion pairs formed by Cu2+ and TPB- in water/1,2-dichloroethane system

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Embodiment Construction

[0025] In order to illustrate content of the present invention more clearly, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0026] (1), the instrument and reagent used in this embodiment

[0027] CHI660C electrochemical workstation (Shanghai Chenhua Instrument Co., Ltd.) was used for cyclic voltammetry experiments; a platinum electrode (Shanghai Chenhua Instrument Co., Ltd.) with a diameter of 2 mm was used as the working electrode; platinum wire (Shanghai Chenhua Instrument Co., Ltd.) was used as the counter electrode (diameter 0.5mm), Ag / AgTPB is the reference electrode (for organic phase); saturated calomel reference electrode (for aqueous phase) (Shanghai Ridao Scientific Instrument Co., Ltd); quartz tube heating automatic double pure water distiller ( 1810B, Shanghai Asia-Pacific Technology Glass Co., Ltd.) is used to prepare double distilled water; electronic balance (Beijing Sartorius Instrument ...

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Abstract

The invention discloses an electrochemical detection method for ion pairs formed by Cu2+ and TPB- in a water / 1,2-dichloroethane system, which comprises the following steps: performing cyclic voltammetry scanning on platinum working electrode, counter electrode and reference electrode on a water / 1,2-dichloroethane interface, thereby obtaining an irregular current cyclic voltammogram, wherein a test proves that the irregular current is caused by the ion pairs formed by Cu2+ and TPB- on a liquid / liquid interface; and meanwhile, utilizing a density functional theory to calculate minimal gibbs free energy of the ion pairs TPB-Cu2+TPB- formed by Cu2+ and TPB-, thereby obtaining the composition of the most stable ion pairs. The electrochemical detection method has the characteristics that the adopted instrument is simple; the consumption of drugs is less; the sensitivity is high; the test operation is easily performed; and the electrochemical detection method has an application prospect in researching the structure of the liquid / liquid interface and biochemistry by detecting the ion pairs formed by Cu2+ and TPB-.

Description

technical field [0001] The present invention relates to Cu in a kind of water|1,2-dichloroethane system based on a three-electrode system composed of a platinum electrode and a reference electrode, i. 2+ with TPB - Electrochemical detection method for ion pair formation. technical background [0002] An ion pair is a pair of ions formed by two ions with opposite charges bound by Coulomb attraction. In solution, ion pairs behave as a whole in terms of conductivity, kinetics, osmotic pressure, etc. Because of its particularity, it is favored by researchers and is a current research hotspot. With the in-depth study of different kinds of ion pairs, they play an increasingly important role in the research of biochemistry, medicine, environmental protection, life science and analytical chemistry. Copper is an indispensable micronutrient for human health. Copper also has very good medical uses and strong bactericidal effects. Cu(II) compounds have broad application prospects i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 刘秀辉张义军南志汉裘宇卜彩红王永成卢小泉
Owner NORTHWEST NORMAL UNIVERSITY
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