46
LMS Issue 4 | 2014
Product Review
Speciation Analysis Solves Problems
W
ith the incorporation of Thermo
ICP/ICPMS/AAS and Dionex
ion chromatography (IC) instruments,
Anatech are able to solve the most
complex problems. This is a solution for the speciation of toxic versus
non-toxic metals.
The need to distinguish between
chemical forms of elements has become
critical for food, environmental and
pharmaceutical analysis. Previously,
measuring the total amount of an
element was sufficient.
However, different forms of an
element can exhibit distinct levels of
toxicity. Separation and quantification of
different oxidation states of an element
(speciation analysis) can be utilised to
determine an element’s chemical form.
Speciation analysis can be split into
separation of individual ionic species by
IC and trace elemental detection and
quantification using IC – inductively
coupled plasma mass spectroscopy
ICP/MS.
Using ICP/MS with a selective
separation technique such as IC provides
complete information on an element’s
chemical form.
Ion chromatography
For ion a na ly sis, t he T her mo
Scientific™ Dionex™ IC solutions
deliver uniquely beneficial technology,
namely Reagent-Free™ IC (RFIC™)
systems. These systems use electrolytic
technologies to generate eluents and
regenerants from de-ionised water,
which decreases time spent on equilibration, calibration and method verification.
Minimising the unintentional variations
in the preparation of eluents and regenerants discards the need for required
consistence checks.
Elements currently speciated using IC and ICP/MS
Arsenic
As+3, As+5
Chromium
Cr , Cr
Mercury
Hg , EtHg , and MeHg
Selenium
Se+4, Se+6
S
+3
+6
+2
+
+
Get Skinny Sections
truers offer a wide range of equipment and consumables designed
for the preparation of mineralogical
samples. Expanding their offering, they
would like to introduce
the new SystemAbele.
This instrument consists of a unique set of
accessories developed
specifically to make the
preparation of thin sections faster and easier.
For mounting of rock
samples there is the new
Struers EpoSpeed UV
bonding resin, which
cures in a mat ter of
minutes compared to
the usual hours taken
in the traditional epoxy
resins.
A new bonding jig is
also available, which applies pressure
to the samples while the resin cures
ensuring that a perfect bond is achieved.
Grinding and polishing of thin sections can be carried out manually with
precise material removal and with very
little user training, which saves time