This manual is intended for the practising chemist who has to do
a job in analysing plant material. Therefore, the present manual
only contains ready-to-hand procedures without any comment. The
procedures described are only for inorganic components, which
frequently occur in the plant. Most procedures are designed to give
a total content value of the element under consideration,
regardless of the chemical structure in which it occurs in the
plant.
We have chosen for a design in which all digestion procedures
are described in one chapter, all extraction procedures in one
chapter and all determination procedures in one chapter. As a
consequence, one has to choose a suitable digestion method in
combination with the intended determination technique; this has
been indicated within each individual determination procedure.
For determination of the elements, mainly spectrometric
techniques are used here. Depending on the kind of element and the
expected concentration level, the following methods are applied:
flame atomic emission spectrometry (flame AES), flame atomic
absorption spectrometry (flame AAS), inductively coupled plasma
optical emission spectrometry (ICP-OES), electrothermal atomisation
(graphite furnace) atomic absorption spectrometry (ETA-AAS),
inductively coupled plasma mass spectrometry (ICP-MS),
spectrophotometry and segmented flow analysis (SFA). Besides,
potentiometry (ion selective electrodes (ISE)) and coulometry will
be encountered. In many cases, more than one method is described to
determine a component. This provides a reference, as well as an
alternative in case of instrumental or analytical problems.
General
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