In Advances in Chemistry Research. Volume 61, the classical and modern scientific references discussing the applications of charged particles are analyzed. Mathematical models of electrostatic coagulation, sorption, sedimentation of particles in the electric field, increases in wettability of a surface of particles are proposed. The authors discuss the chemistry, synthesis, structural modifications and photophysical properties of the fluorescein moiety, with special emphasis on the detection of metal ions such as Cu(II), Zn(II), Hg(II) and Fe(III) using spectrophotometric methods. Next, the geometric analysis and simulation reproduction of empirically extracted peptide coverage ratio, I , over a nano-gold colloid surface was conducted by assuming a prolate shape of all tested amyloidogenic peptides. The following study highlights the role of analytical instrumentation and analytical methods in assessing the quality of pharmaceutical drugs. Attaining a high quality of finished products in the pharmaceutical industry is an incessant challenge that necessitates the development of fast and accurate analytical methods. In closing, the adsorption characteristics of methylene blue on purified bagasse bottom ash are investigated. The purified bagasse bottom ash adsorbent was prepared through purification of a crude BBA obtained from a sugarcane industry using a mixed solution of HCl 0.1 mol/L and HF 0.3 mol/L and followed by HNO3 5 mol/L.