Electrochemical detection electro analysis

The chlorophenols, cyclohexadienones, benzoquinones and chlorophenoxy-phenols are analysed using UV detection. Simultaneous electrochemical detection enables specific analysis of electro active compounds in reduction. 

C. Pan, M. Guo, Z. Nie, X. Xiao, and S. Yao, Aptamer-based electrochemical sensor for label-free recognition and detection of cancer cells. Electro-analysis, 21, 321-1326 [2009],... 

The second part describes the application of this automated potentiostat as an electrochemical detector for various electro-inactive anionic species nitrate (NOg ), nitrite (NOg"), sulfate (SO "), chloride (CD, etc. (1,2). The electrochemical detection involves the use of a conducting poly(3-methylthiophene) (P3MT) polymer modified platinum electrode in a flow injection analysis (FIA) mode. 

The new complexes II (n = 1, m = 2 n = m = 2) have been prepared from the reaction between two moles of [Mo(NO)L Cl2] and the appropriate diaminodibenzo-crown ether. The bis complex IV was also prepared from the reaction between the monoiodide derivative, [Mo(NO)L I NHC6H30CH2(CH20CH2)3CH20 ], and NH2QH30CH2(CH20CH2)3CH20 in the presence of sodium naphthalenide. These new complexes were characterised by elemental analysis and by infrared, H-NMR and mass spectroscopy. In the cases where n = m= and n= 1, m = 2 it proved possible to separate the cis and trans isomers of the diaminodibenzo-crown ether precursors and in these cases only one isomer of the bimetallic complex was synthesised and used in the subsequent studies. However, in the case where n = m = 2 separation of the cis and trans isomers was not possible and the complex characterised was a mixture of the two isomeric forms. Since the single isomers and the mixture exhibited similar spectral properties and behaved in a similar manner in the electrochemical experiments it would appear that there are no electro-chemically detectable differences between the cis and trans isomers. 

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