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- W2364018833 abstract "The charge-transfer (CT) reaction between 7,7,8,8-tetracyanoquinodimethane (TCNQ) with six amino acids, L-leucine, L-lysine, L-arginine, L-phenylalanine, L-glutamic acid, and L-cysteine was studied in detail by spectrophotometry. The charge-transfer complexes between TCNQ and amio acids have stable yellow colour. Therefore a new and single method for the determination of amino acids has been established. The optimization of the experimental condition is described. The determination was carried out in the solution of 20% ( V %) acetone with pH 9.8 at 415 nm. Beer′s law was obeyed in the range of 0.2×10 -3 -1.5×10 -3 , 0.2×10 -3 -1.0×10 -3 , 0.5×10 -3 -2.5×10 -3 , 0.5×10 -3 -2.0×10 -3 , 0.5×10 -3 -2.5×10 -3 and 1.0×10 -3 -3.0×10 -3 mol·L -1 for leucine, lysine, glutamic acid, phenylalanine, arginine, and cysteine respespectively. The instability constants of complexes were determined. The compositions of all these CT complexes are found to be 1∶1 by different methods. The relative SDs are less than 2% ( n =8). The proposed method has been applied to the determination of monosodium glutamate with satisfactory results." @default.
- W2364018833 created "2016-06-24" @default.
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- W2364018833 date "2003-01-01" @default.
- W2364018833 modified "2023-09-27" @default.
- W2364018833 title "Study on the Charge-transfer Complex of Amino Acids with TCNQ by Spectrophotometry" @default.
- W2364018833 hasPublicationYear "2003" @default.
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