Download Analytical Methods for Glycerol by M. R. F. Ashworth PDF

By M. R. F. Ashworth

ISBN-10: 0120650509

ISBN-13: 9780120650507

Show description

Read Online or Download Analytical Methods for Glycerol PDF

Similar mathematics books

The Riemann-Hilbert Problem: A Publication from the Steklov Institute of Mathematics Adviser: Armen Sergeev

This booklet is dedicated to Hilbert's twenty first challenge (the Riemann-Hilbert challenge) which belongs to the speculation of linear structures of standard differential equations within the advanced area. the matter concems the life of a Fuchsian procedure with prescribed singularities and monodromy. Hilbert used to be confident that the sort of process consistently exists.

Additional resources for Analytical Methods for Glycerol

Example text

A g N 0 . They filtered this off and heated a suspension in water for 30 min at ca. 100°C, yielding silver iodide that was easily filtered off; it was dried at 120-130°C and weighed. A reaction time of about 2 h was adequate for aqueous glycerol solutions. Zeisel and Fanto applied their method to determine glycerol in various wines and juices. 7). Criticisms of the method were expressed and improvements suggested. N o detailed discussion of this is made here and only a few references are given.

It is clearly applicable also for identifying the acrolein obtained from glycerol. For example, Jambor and Demeny (1936) detected glycerol in leather by converting it into aceolein and preparing the p-nitrophenylhydrazone. 4 GLYCEROL the tube a slide carrying a drop of a s o l u t i o n ^ p-nitrophenylhydrazine in 15 % acetic acid. Acrolein was then identified through the eutectic temperature of its p-nitrophenylhydrazone, thus prepared, with acetone p-nitrophenylhydrazone, prepared from a drop of aqueous acetone and the same reagent in excess.

2 4 2 7 3 2 3 3. Determination of Manganese Dioxide In a publication subsequent to those just mentioned, Berka and Pauleova (1971) determined glycerol (also ethylene glycol and mannitol) by boiling for 1 h with 0-1N potassium permanganate and 2M sodium carbonate. After cooling and adding enough sulphuric acid to achieve a 2 N concentration, they waited for 15 min, added 0*5M manganese(II) sulphate, and filtered off the manganese dioxide formed. This was dissolved in saturated pyrophosphate-4N sulphuric acid-0*5M manganese sulphate (6 + 2 + 1 ) , yielding the pyrophosphate complex of manganese(III).

Download PDF sample

Rated 4.78 of 5 – based on 39 votes