Electronic absorption spectra were obtained using a Beckman ACTA CIII ultraviolet-visible linear wavelength spectrophotometer and a Beckman DK-2 spectrophotometer. An Aminco-Bowman 8202 spectrophotofluorometer was employed for fluorescence measurements, and mass spectra were recorded using an AEI MS9 mass spectrometer equipped with a solid sample probe inlet system. The general procedure descri...

Gold Nanoparticles successfully applied for detection of Chlorpyrifos pesticide present in various water samples. Structural and morphological studies of Gold Nanoparticles were studied following UV-Visible Spectrophotometer, SEM and HRTEM. Trisodium Citrate has been used as a reducing agent. The author successfully applied Gold Nanoparticles capped with citrate ions for monitoring Chlorpyrifos...

An operationally simple colorimetric way for measuring hyaluronidase activity was developed using cysteamine-bound gold nanoparticles. The addition of gold nanoparticles into hyaluronidase-containing solutions resulted in color changes, which could easily be observed with the naked eye or a UV/Vis spectrophotometer.

A Simple, rapid and economical procedure for estimation of piperine by UV Spectrophotometer in different piper species was developed and is described. The method is based on method is based on the identification of piperine by TLC and on the ultra violet absorbance maxima in alcohol at 328 nm.

Activated carbon (AC) has been prepared from raw coconut pith and coconut pith impregnated with H3PO4 and NaOH solutions separately. AC was characterized with SEM, particle size analyzer and proximate analyzer. Adsorption studies were carried out using UV and atomic absorption spectrophotometer to find its effectiveness. AC obtained from coconut pith treated with phosphoric acid was found compa...

A simple, rapid and economical procedure for estimation of Embelin by UV Spectrophotometer in Embelia ribes was developed and is described. The method is based on the identification of Embelin by TLC and on the ultra violet absorbance maxima in chloroform at 285 nm. A value of 4.80% w/w of Embelia was found in test simple.

The VOx/LUS-1 nanoporous silica synthesis and characterized by XRD, Nitrogen adsorption–desorption isotherms and UV-visible spectrophotometer. Direct oxidation of benzene to phenol in liquid phase by H2O2 peroxide were examined by using various (methanol, acetone, acetic acid, acetonitryl) solvents.