One-Step UV-Induced Synthesis of Polypyrrole/Ag Nanocomposites at the Water/Ionic Liquid Interface

Polpyrrole (PPy)/Ag nanocomposites were successfully synthesized at the interface of water and ionic liquid by one-step UV-induced polymerization. Highly dispersed PPy/Ag nanoparticles were obtained by controlling the experimental conditions. The results of Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy revealed that the UV-induced interface polymerization leaded to the formation of PPy incorporating silver nanoparticles. It was also found that the electrical conductivity of PPy/Ag nanocomposite was about 100 times higher than that of pure PPy

Determination of ethanol content in ayurvedic formulations kumaryasava and mustakarista by gas chromatography

In the present study, two brands of Kumaryasava and Mustakarista medicinally important ayurvedic preparations were studied for quality control parameters like physiochemical properties, ethanol content by specific gravity and gas chromatographic methods and the total phenolic content. Evaluation of physiochemical properties and total phenolic contents resulted in establishing ranges for routine analysis. In both the formulations, ethanol content observed by specific gravity method varied from 0.9 to 1.9% on day 0 and reduced on storage for 30 days ranging from 0.1-0.6% v/v. Similarly, ethanol content determined by GC on day 0 varied from 0.1-1.6% v/v and on 30th day from 0.011-0.025% v/v. This reduction in ethanol content on storage might be due to loss caused by frequent opening of the container