Publications by authors named "T Shen-yang"
Study on the charge-transfer reaction between 7,7,8,8-tetracyanoquinodimethane and drugs.
J Pharm Biomed Anal
November 1999
The charge-transfer (CT) reaction between 7,7,8,8-tetracyanoquinodimethane (TCNQ) as a pi-electron acceptor and cinnarizine, analgin, norfloxacin as electron donors have been studied by spectrophotometric method. The charge transfer complexes between TCNQ and these drugs have stable blue color, therefore a simple, rapid, accurate and sensitive method for determination of these drugs has been developed. The optimization of the experimental conditions is described.
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- The study calculates the distribution of various chromium(VI) species in water, including CrO4^(2-), Cr2O7^(2-), HCrO4^(-), and H2CrO4, across different pH levels.
- The total chromium(VI) concentrations examined range from 10^(-2) to 10^(-6) M, highlighting the impact of dilution on species distribution.
- The pH levels considered in the calculations range from 1 to 8, indicating how acidity affects the presence of these chromium species in solutions.