VP Europe LECO
K = Hr. Thomas Kützemeier
L = Hr. Ralf Löscher
K: Hello Mr. Löscher. Very nice to meet you for this interview
L: Hello Mr. Kützemeier. Yes, welcome to LECO in Mönchengladbach
at our sales and service office.
K: Mr. Löscher, you've now been with LECO, apart from a very
brief period away, since 2000 when you started in what was
then a relatively new field for the company, the "Separation
Science" division. As European Vice President, I would assume
that the "Separation
Science" division has a special place in
your heart. How is LECO active in this field?
L: In the field of chromatographic separation science technology,
LECO offers GC coupled to time-of-flight (TOF)
mass spectrometry (MS). This includes one-dimensional
well as two-dimensional chromatography (GCxGC), which
increases chromatographic resolution and sensitivity.
In the food sector, we are quite a speciality provider,
as the market has up until now been driven by
single and triple quadrupole MS technology. In some
The term "dioxins," is related to two categories of differently
chlorinated compounds consisting of 75 polychlorinated
dibenzo-p-dioxins (PCDD) and 135 polychlorinated
dibenzofuranes (PCDF). Dioxins (PCDD/F) have
similar chemical, physical and toxic characteristics. They
are lipophilic compounds ubiqitously spread in the environment
and therefore migrate into foods. Dioxins accumulate
via feeding stuffs in the fat tissues of animals and
humans. Highly toxic and at the same time persistent are
17 congeners, which are chlorinated in the 2,3,7,8-position.
The congener with the highest toxisticy is the
2,3,7,8-TCDD, the so-called Seveso-dioxin.
application areas however, our instrumentation and
technology can supplement or upgrade the traditional
instrumentation. A good example is MOSH/MOAH residues
analysis (mineral oil hydrocarbons in e.g. Recycling packaging
and food). Here, LECO GCxGC-TOF can help to clarify
and correct possible false-positive results in fatty foods.
In addition, our latest technology is competitively
priced in relation to triple quadrupole alternatives. Furthermore,
GC-TOF-MS technology is basically unbeatable for
the analysis of residues in complex matrices such as teas,
spices, oily products, but also baby food.
A key factor for reliable results in these difficult matrices
is the robust, open ion source designs of our TOF-MS
which enable excellent sensitivity alongside high chromatographic
and mass spectral resolution.
If we take the determination of pesticide residues in
food this typically uses the QuEChERS sample preparation
method for extraction (Quick, Easy, Cheap, Efficient, Robust,
Safe), which normally requires the application of large
volume sample injections to compensate for the typically
low matrix concentration of analyte residues. Here, our
open ion source performs excellently without problems.
With our analysis, we consistently achieve the required
recovery rates for target compounds (i.e pesticides) and due
to the enhanced data output from TOF-MS, we can also investigate
the same chromatograms for non-target compounds
with the aid of retention index and mass spectral libraries.
Dr. Ralf Löscher
VP Europe LECO
Until 1995 studies of biology at the Universities Bochum and Freiburg
1995-2000 Sales and Key Account Manager North-Rhine Westfalia at WATERS Eschborn
2000-2008 LECO Instruments Mönchengladbach, Sales and Marketing Manager Separation
2008-2010 International Sales Manager, GERSTEL, Mülheim
As of 2011 Vice President Europe, LECO, Geleen, NL