210VGP Atomic Absorption Spectrophotometer
The 210VGP 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 RS-232 serial 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, beam splitters, 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.
|Wavelength Range:||190 to 900nm, Accuracy ± 0.2nm, Precision ± 0.1nm|
|Monochromator / Optics:||250mm Ebert mount, 600 lines/mm grating, 0.2-0.7-2.0nm bandpass|
|Hollow Cathode Lamp Supply:||Triple HCL power supply; 3 to 75 mA peak in NORMAL mode, 3 to 750mA in GIANT PULSE mode. The 205 has a three lamp design.|
|Background Correction:||Deuterium - In-Line (see-through) configuration, pulsed illumination, hot cathode, variable frequency, corrects from 190-350nm (0.7nm slit). Variable Giant Pulse - Self-reversing HCL currents up to 750 mA with pulse time from 10 to 200 microseconds, corrects from 190-900nm. The 205AAS Does not feature D2 Background correction|
|Burner / Nebulizer:||Polypropylene spray chamber with pre-mix burner and high efficiency adjustable nebulizers (SS), Titanium burner heads for Air/Acetylene, Argon/Hydrogen and Nitrous Oxide/Acetylene operation.|
|Microprocessor:||Computer control by 80C188 chip, 8/16 bit operation, 12/24 MHz clockspeed; non-volatile SRAM storage of >200 method files.|
|Integration / Response Range:||User selectable times from 0.5 to 10 seconds for continuous (flame) and transient (furnace, hydride) signals.|
|Calibration:||Automatic, weighted least squares fit to 1st, 2nd, 3rd, or 4th order functions, up to 8 points.|
|Display:||16-line backlit liquid crystal display for all text and graphics|
|Output Modes:||LCD display, IEEE-488 Parallel port for dot-matrix printer, RS-232 Serial port|
|Dimensions / Weight:||39"L x 11"W x 12"H; 50 lbs (81 lbs shipping weight)|
|Power Supply:||100-240 VAC operating range, 50/60 Hz AC, <150 watts|
Atomic Absorption Application Notes
AA3001 Sample Preparation of Glass and Ceramic Materials for Atomic Absorption Analysis
AA3002 Determination of Trace Lead, Poly-Phenols and Tannins in Wines Using a Single Analytical Instrument
AA3003 Determination of Major Components and Trace Contaminants in Assorted Plating Baths by Atomic Absorption Analysis
AA3004 Analysis of Whole Blood for Trace Lead (Pb) by Graphite Furnace AAS
AA3005 Determination of Wear Metals and Additives (Soaps) in Lubricating Oils by Atomic Absorption
AA3006 Determination of Major Electrolytes, Minor Minerals, and Trace Heavy Metals in Physiological Fluids by Flame and Graphite Furnace Atomic Absorption Spectroscopy
AA3007 Determination of the Environmental TCLP Metals in Waste-Waters, Solid Wastes, and Soils by Flame Atomic Absorption Spectrophotometry
AA3008 Indirect Determination of Gold Purity by Measurement of Impurities with Flame AAS
AA3009 Analytical Methodology for the Characterization of Steels and Iron Alloys by Atomic Absorption Analysis
AA3011 Evaluation of Mineral Supplements for Content and Purity by Flame/Graphite Furnace AAS
AA3012 Determination of Trace Elements in Lead for Battery Application Using Atomic Absorption Analysis