Online estimation of impurity ion concentration in solution purification process

A Fractional Model of Impurity Concentration and Its Approximate Solution

This paper proposed a fractional model for the flow rate and characteristic of the impurity of order α, β(0<α, β≤1) respectively, which describes one dimensional dynamical flows of electrically conducting fluid. In this model fractional derivatives are described in the Caputo sense. The beauty of the paper is residual analysis which shows that our approximate solution converges very rapidly to ...

The Colorimetric Estimation of the Hydrogen Ion Concentration of Blood.*

With the introduction of Cullen’s calorimetric method (1) of estimating the hydrogen ion concentration of blood serum or plasma, it seemed possible for every laboratoryto have a methodemploying minimum material and apparatus and yet secure reliable results. It is generally conceded that the results obtained by the method on normal human plasma or serum agree very well with the true pH as determ...

Degradation of High-Concentration of Perchloroethylene from Aqueous Solution Using Electro-Fenton Process

Introduction: Perchloroethylene (PCE) is one of the most well-known chlorinated organic compounds recently detected in aqueous environments. The presence of PCE in aquatic ecosystems has caused many health problems and environmental challenges. Therefore, its removal and treatment from aqueous environments are essential. Materials and Methods: The electro-Fenton (EF) process was carried out in...

Equilibrium concentration of impurity-vacancy complexes

A Biological Method for the Estimation of Calcium Ion Concentration*

The sensitivity of the frog’s heart to changes in the calcium content of its nutrient fluid has long been known. Straub (1) commented that this sensitivity could be made use of to titrate calcium concentrations. Trendelenburg and Goebel (2) used it to demonstrate the reduction in calcium in the serum of the cat in parathyroid tetany. Klinke (3), in his comprehensive review, mentions the frog’s ...