Journal of Petroleum & Environmental Biotechnology

Stephen S

Publications

• Research Article
  Tracking Interfacial Adsorption/Desorption Phenomena in Polypropylene/Biofuel Media using Trace Cr3+/Cr6+ and As3+/As5+-A Study by Liquid Chromatography-plasma Mass Spectrometry
  
  Author(s): Stephen S, Pillay AE, Shah T and Siores EStephen S, Pillay AE, Shah T and Siores E
  
  The effect of adsorption/desorption of biofuels on polymers cannot be directly measured unless the fuel is infused with a marker or tracer to track the impact of the phenomenon. Certain trace chemical species in biodiesel can serve as natural markers and our study investigated the use of such natural markers in neem biodiesel to indirectly evaluate the kinetics of adsorption and desorption. Chemical species Cr3+/Cr6+ and As3+/As5+ naturally present in biodiesel were employed as tracers to measure the rates of adsorption and desorption in polypropylene material following immersion in biofuel media for selected intervals. Ultra-sensitive hyphenated HPLC linked to ICP-MS was deployed to monitor these effects. Elution followed by mass spectrometry for simultaneous detection was conducted for convenient resolution of all four species. A C-8 reinforced silica column formed the stationary ph.. View More»
  DOI: 10.4172/2157-7463.1000239

  Abstract