close

Вход

Забыли?

вход по аккаунту

?

Book Review Grundlagen der analytischen Chemie. Unter besonderer Bercksichtigung der Chemie in wrigen Systemen. (Principles of Analytical Chemistry. With Special Reference to Chemistry in Aqueous Systems). By F. Seel

код для вставкиСкачать
have been discovered; six of these, e.g. showdomycin ( 3 ) ,
are antibiotics. [The Chemistry and Biochemistry of C-Nucleosides. Progr. Med. Chem. 13, 303-349 (1976); 265 references]
[Rd 918 IE-F]
Disguised chemical selectivities are the subject of a review
article by P. Rys. That several chemical reactions can compete
with one another is a well known phenomenon. Kinetic chemical selectivity is defined as the ratio of the rate constants
of two competing reactions, and thermodynamic chemical
selectivity as the ratio of their equilibrium constants. If diflusion or adsorption effects alter the rate of at least one of
the reactions, the selectivity is disguised. In specific cases
it can be shown that the product pattern depends e.g. on
the precursor complexes of the reaction partners, the spatial
orientation of the reaction partners in these complexes, or
on the diffusion conditions. [Disguised Chemical Selectivities.
Acc. Chem. Res. 9, 345-351 (1976); 58 references]
[Rd 913 IE-L]
The influence of prostaglandins on the behavior of blood vessels
is reported on by J . C. McGfl, K . U . Malik, and N . A .
Terrugno. Prostaglandins are tissue hormones which manifest
their effect in the immediate neighborhood of the site of formation. Endogenous prostaglandins, e. y. PGE2, counteract vasoconstriction and the anti-sodium diuretic activity of circulating, hypertensive hormones, and control the release of noradrenalin. This is demonstrated by the increased sensitivity of
vessels havinglow or inhibited rates of prostaglandin synthesis
to stimulation by hypertensive hormones and inhibition of
the activity of these hormones by exogenous prostaglandin.
[Prostaglandins as Determinants of Vascular Reactivity. Fed.
Proc. 35, 2382-2387 (1976); 53 references]
[Rd 924 IE-R]
BOOK REVIEWS
Grundlagen der analytischen Chemie. Unter besonderer Beriicksichtigungder Chemie in wiiI3rigen Systemen. (Principles
of Analytical Chemistry. With Special Reference to Chemistry in Aqueous Systems). By F. Seel. Verlag Chemie, Weinheim-New York 1976. 6th improved edit., 387 pp., 49
figs., 53 tables, bound, DM 42.--.
If we consider modern analytical chemistry to be a science
whose aim is to provide correct information about chemical
systems--a view generally accepted today in professional
circles--then we must agree that it is impossible to write
a textbook of 387 pages covering the “Principles of Analytical
Chemistry” (chemical, physical, and biochemical analysis) with
Prof. Seel’s specific extreme precision. Accordingly, the phrase
“With Special Reference to Chemistry in Aqueous Systems”
is an important part of the title of the “new Seel”.
This was certainly the author’s reasoning. In his own words,
“The present book presents a collection of the most important
principles of general chemistry insofar as these are relevant
to the analytical work that the student carries out in his
basic inorganic practicals”. This presumably means “qualitative” and “quantitative” analysis in the classical sense. Opinion
as to whether processes such as colorimetry, polarography,
potentiometry with ion-selective electrodes, chromatography,
statistical evaluation of the methods, and assessment of analytical methods and results should nowadays be included in these
basic courses will not be discussed here.
What is certain is that the author intentionally rejected
treatment of specialized processes on this occasion in order
to be able, within the given limits, to describe the physicochemical principles of classical analytical chemistry in his usual
demanding manner.
It should be emphasized that the book succeeds in the
attempt to “derive the variety of analytically important (chemical) reactions from a very small number of fundamental
reactions types (dissolution and precipitation processes, complexation. acid-base reactions, and redox reactions). It is repeatedly stated, and proved by the application of the law of
mass action, that the course of many analytical reactions
can be explained only by a combination of such fundamental
model reaction types. Indication of the formal relationship
between acid-base and redox reactions is also important for
A11qiw. Cliewz. l n f . E d . Enyl. (1Y77) No. 2
the student. The didactic value of the book is enhanced
by the use of logarithmic diagrams for the description of
dissociation equilibria in the basic chapters and by their application to practical problems in hydrogen sulfide separation
processes.
Partly as an understatement and partly self-critically, the
author claims that his work “... is no textbook of analytical
chemistry”. A better description would be “. .. an excellent
textbook on special chapters in analytical chemistry”. The
author does not simplify but explains in detail and requires
the reader’s intelligent participation.
Robert Kellner [NB 358 IE]
Handbook of Analysis of Organic Solvents. By I/: Sediuec and
J . Flek. Ellis Horwood Ltd., Chichester 1976. 1st edit.,
455 pp., various figs., numerous tables, bound, L 18.00.
In this monograph the authors limit themselves mostly
to “classical” analysis of solvents, whilst often admitting a
very wide interpretation ofwhat a solvent may be. Gas chromatography receives very brief mention and spectroscopic
methods none at all. The first part gives general principlessampling, determination of physical constants, separation, and
quantitative analysis of two- and three-component systems;
in the second part individual groups of compounds are discussed. However, alkyl aryl and diary1 ethers are not included
among the ethers, nor are alkyl aryl ketones among the ketones.
Among other shortcomings we may note: Peroxides and water
can often be excellently removed by Al2O3 (pp. 16 and 20).
There is no mention of the determination of water by Kurl
Fischer’s method (p. 18). Is not a sample for tasting superfluous
(p. 32)? In the distillation of CS2 there is no “Caution” notice
(p. 41). Cumene and p-cymene form hydroperoxides very readily (p. 124). The expression “nascent hydrogen” should be
finally allowed to die (pp. 286/287). As a whole, the book
can be recommended, especially because of its numerous tables
which make it superfluous to refer to the handbooks that
often provide the information less readily. The book is suitable
for the practising chemist but can also be used for teaching.
The production is good.
Heinz Kropf [NB 360 IE]
123
Документ
Категория
Без категории
Просмотров
0
Размер файла
141 Кб
Теги
analytical, bercksichtigung, seel, der, grundlagen, wrigen, references, system, special, chemistry, unter, book, chemie, aqueous, analytische, review, systemen, besonderer, principles
1/--страниц
Пожаловаться на содержимое документа