a simple extractive spectrophotometric method has been developed for the estimation of miconazole nitratein both pure and pharmaceutical preparation. the method is based on the formation of ion-pair complex of thedrug with acidic dye bromothymol blue (btb) in acidic condition, followed by its extraction in organic solvent(chloroform). the absorbance was measured against the corresponding blank....

The first instance of an acidic aqueous biphasic system (AcABS) based on tributyltetradecyl phosphonium chloride ([P44414 ][Cl]) and an acid is here reported. This AcABS exhibits pronounced thermomorphic behavior and is shown to be applicable to the extraction of metal ions from concentrated acidic solutions. Metal ions such as cobalt(II), iron(III), platinum(IV) and nickel(II) are found to par...

A solvent-extraction system comprising toluene/ter-butanol (ter-BuOH) mixed solvent as the organic phase was developed to selectively extract Cr(VI) from acidic chloride media in the presence of divalent metals, namely Cd(II), Co(II), Cu(II), Ni(II) and Zn(II) under 5 M CaCl2 salting-out conditions. Chromium(VI) was selectively extracted as a solvated ion-pair of [ter-BuOH2+ x CrO3Cl-] at ter-B...

The acidic chromatin proteins extracted from normal and neoplastic mammary cells of C3H mice and Fischer rats have been compared by polyacrylamide gel electrophoresis, amino acid analysis, and radioactivity labeling patterns of synthesis in vitro. Following purification of chromatin from purified nuclei and extraction of histones in 2 M sodium chloride, the acidic proteins associated with DNA w...

A method is introduced for recuperation of chromium(VI) in water samples by liquid-liquid extraction with tributylphosphate PO(C4H9O)3 (TBP) from acidic chloride media. The optimum conditions for quantitative extraction of Cr(VI) were evaluated by varying the experimental parameters, such as the shaking period, the pH of the aqueous phase, the hydrochloric acid concentration, the hydrogen and c...

The reversible formation of a coordinative bond between a polymer-bound Lewis-acidic metal complex and a flavin imide moiety allows complete extraction of riboflavin from aqueous solution at physiological pH and its quantitative release at pH 5.

The subcritical fluid extraction of lovastatin from tablet powder mixtures prepared in this laboratory and MEVACOR tablets is successfully demonstrated. Methanol modifier percentage, additive type (acidic, basic, or neutral), and additive concentration on the extraction efficiency are examined. The extraction recoveries of lovastatin from MEVACOR tablets are shown to be highly dependent on meth...

Xylose is a promising feedstock for the fuel and chemical industry. We propose here an integrated process to recover purify xylose from acidic hydrolysate stream, e.g., coming pretreated lignocellulose. This consists of selectively extracting as diboronate ester back-extracting it into clean aqueous solution. report 85% extraction efficiency using toluene/phenyl boronic acid in single stage. sh...

Recently, the extraction of Au(III) using series aliphatic ketones in hydrochloric acid media has been investigated detail. The present study describes behaviors a aromatic ketones, which never reported. Aromatic with shorter alkyl side chains showed higher extractability. rapid and capacity were comparable to industrial extractant dibutyl carbitol (DBC). except acetophenone, are less soluble w...