A potentiometric titration method for the determination of minoxidil based on its redox reaction with K2Cr2O7 is described. The best results were observed using 1.00 x 10-3 mol L-1 K2Cr2O7 and 1.00 x 10-2 mol L-1 minoxidil solutions, and the minoxidil as titrant in 2.00 mol L-1 H2SO4 medium. The method was applied to commercial samples and compared with the results from a chromatographic proced...

The possibilities of application of iodine as a titrant in determination of sulfur compounds have been presented. The influence of the reaction medium, the nature of compounds, and the thiol–thione tautomerism on the reaction stoichiometry of sulfur compounds with iodine has been discussed. The conditions of volumetric titration with visual and potentiometric end-point detection and coulometric...

Isothermal titration calorimetry (ITC) is a straightforward method to determine basic chemical details of a binding interaction (affinity, thermodynamics and stoichiometry) in a single experiment and under native conditions [1, 2]. Traditionally, ITC experiments are performed using the method of incremental titration, whereby a precise volume of titrant is added to a solution of titrand at disc...

Much useful information of a quantitative nature can be obtained with redox-active proteins by anaerobic titration with reducing substrates or chemical reductants such as sodium dithionite. We have used successfully for many years anaerobic spectrophotometer cells equipped with either two or four side arms from which known amounts of titrant can be added (1). This technique gives only a limited...

We have performed a detailed study of the thermodynamics of the titration process in an isothermal titration calorimeter with full cells. We show that the relationship between the enthalpy and the heat measured is better described in terms of the equation Delta H = W(inj) + Q (where W(inj) is the work necessary to carry out the titration) than in terms of DeltaH = Q. Moreover, we show that the ...

batch culture of ralstonia eutropha using the recycled gas closed circuit culture system was conducted in order to develop a practical fermentation system for industrial autotrophic culture for poly (hydroxybutrate) production. the gas phase of the culture system consisted of substrate gas so that gases in this culture could be recycled as long as the amount of the gas consumed would be repleni...