Volumetric determination of phenol

Volumetric determination of columbium.

The quantitative determination of columbium based on reduction by amalgamated zin c and reox idation with potassium permanganate has, in general, produced results that lack both accuracy and precision. A study of t he various factors involved indicates that essential conditions requ ire adequate duration of reduction in t he presence of an excess of zinc and a proper concentration of both acid ...

EDWARDS : Volumetric Determination Of Carbon

Volumetric determination of calcium in blood serum.

Automated method for the determination of phenol in biological products.

A method is described for the rapid and accurate determination of phenol in biological products by using automated methods.

Colorimetric determination of potassium by Folin-Ciocalteu phenol reagent.

A method for the colorimetric estimation of manganese by reduction of the phosphomolybdicphosphotungstic acid phenol reagent has been described (Abul-Fadl, 1948). Cobalt was also found to give a similar colour reaction in the presence (but not in the absence) of amino-acids. Conversion of cobalt into the cobaltinitrite did not affect its response to this reaction. As methods for the estimation ...