ITRATION of the chloride ion with Hg(II), using s-diphenylcarbazone as an indicator has been discussed by Laitinen (1). This is a one-color indicator which at pH 3 is colorless in the unmetallized form and forms a violet Hg(II) complex. The violet color is seen at the end point of the titration. Schales and Schales (2) used s-diphenylcarbazone as the indicator for the mercurinletric titration o...

A sensitive method is proposed for the colorimetric determination of free fatty acids (FFA). Diphenylcarbazide containing diphenylcarbazone is used as the color developing reagent instead of diethyldithiocarbamate which was employed in the previous method (1965). J. Lipid Res. 6: 16-20). The present method was successfully applied to the determination of FFA present in as little as 40 microlite...

Mercury is quantitatively retained with 1, 5-diphenylcarbazone (DPC) on microcrystallinenaphthalene in the pH range 6.5-8.5 from a large volume of aqueous solutions of various samples.After filtration, the solid mass consisting of the mercury complex and naphthalene was dissolvedin 5.0 mL of dimethylformamide (DMF) and mercury was determined by spectrophotometricmethod at 542 nm against the rea...

Two simple, rapid and accurate methods for the determination of bupropion hydrochloride (BUP) in pure and in pharmaceutical preparations are described. Both methods are based on the measurement of the chloride of its hydrochloride. In the titrimetric method, the chloride content of bupropion hydrochloride is determined by titrating with mercury(II)nitrate using diphenylcarbazone–bromophenol blu...

mercury is quantitatively retained with 1, 5-diphenylcarbazone (dpc) on microcrystallinenaphthalene in the ph range 6.5-8.5 from a large volume of aqueous solutions of various samples.after filtration, the solid mass consisting of the mercury complex and naphthalene was dissolvedin 5.0 ml of dimethylformamide (dmf) and mercury was determined by spectrophotometricmethod at 542 nm against the rea...

This study reports the development and validation of a analytical approach for simultaneous Cr(III) Cr(VI) speciation analysis in bread breakfast cereals using species specific isotope dilution (SS-ID) high-performance liquid chromatography (HPLC) coupled to inductively plasma-mass spectrometry (ICP-MS). The were extracted by sequential complexation genuine with ethylenediaminetetraacetic acid ...