Scientific’s 210VGP series Atomic Absorption Spectrophotometers are
the culmination of more than 25 years of success and experience as a
manufacturer of spectroscopy instruments.
The 200 Series AA’s are powerful, compact and cost effective solutions
to all atomic analyses. It has been designed to meet the performance
and flexibility your laboratory requires now and in the future.
The 210/211 is shipped ready for use. All operating conditions
are pre-loaded in the internal computer, including lamp settings,
secondary wavelengths, and alternate methods of analysis for over 60
elements by flame, furnace, or hydride techniques. The three lamp
turret has individual controls for alignment and standby mode to keep
lamps warm. Direct report generation to a printer or data linking
to the optional Buck Analyst software package is easily done using the
parallel and RS232C ports.
The Buck 210/211 is a high energy, microprocessor controlled single
beam atomic absorption spectrophotometer. Solid state electronics
and simple optics provide the basis for our superior stability and
sensitivity. The Ebert mount monochromator and user-selectable
bandwidth give the system maximum flexibility. Our short-path dynamic
nebulizer/burner configuration is highly efficient. An inert needle,
precisely positioned in a high flow venturi, delivers sample to the
corrosion proof impact bead. This results in a tremendously high
nebulization effect for all types of sample matrices
Deuterium Background Correction
This is the oldest and still most commonly used technique,
particularly for flame AAS. In this case, a separate source (a
deuterium lamp) with broad emission is used to measure the background
absorption over the entire width of the exit slit of the spectrometer.
In the 210VGP & Accusys 211 the deuterium lamp is in-line with the
hollow cathode lamp, thus eliminating the need for a double beam
system. The benefits of a single beam system are more energy, smaller
size, lower cost, and a more sensitivity.
The Buck 210VGP is a single beam AA which has proven itself
worldwide as a workhorse. Our simple, single beam optical layout
may buck convention, (no pun intended) but we know it works
better. Let us explain.
Double beam instruments were originally designed to overcome poor
hollow cathode lamp characteristics, noisy Power Supplies, drifting
detectors & amplifiers, thermal expansion variations in optical
components (mirrors, beamsplitters, mounts, etc.) By using a high
light-loss optical component, the beam splitter, to divide the signal
beam from the hollow cathode lamp, served to correct for these low
performance components; thus halving the available energy to make a
sample measurement, compensation between the reference and sample beams
was maintained. In later years, the addition of a deuterium continuum
lamp for background correction introduced a second beam splitter; thus
cutting the hollow cathode lamp energy in half again. This does not
even take in to account the 6-10 additional Mirrors used to define the
optical path for these large, heavy and expensive (albeit very stable)
double beam AAS instruments.
So, after fixing AA instruments for 20 years Buck set out to design a
single beam AA just to see if it could be done. Well it worked,
and since 1992 the 210VGP has been delivering superior results due to
it's simple optical layout providing a high energy throughput.
For more information please contact Buck Scientific.