Our line of New Atomic Absorption Spectrophotometers

211 Atomic Absorption Spectrophotometer

211 Atomic Absorption Spectrophotometer The Accusys 211 AAS is the next evolution of the highly successful Buck 210-VGP , incorporating a series of sophisticated automatic functions and safety features into the high-sensitivity, interference-free design of Buck's unique "Stable-Beam" optical system. The proprietary non-Flame ignition system and automatic controls make the Accusys-series instruments the AAS of the new Millennium.

Unique non-flame ignitor provides the safest instrument start-up

Simple 3 button operation for fully automatic gas controls, ignition and gas switchover (Air to Nitrous Oxide)

Automatic optimization of analytical parameters when method files are loaded from the 211’s built-in Methods Library

Fully integrated safety interlocks for gas pressure sensors, burner head type, UV flame sensor, drain line trap and ignitor continuity insure safe operation of the 211 AAS

Upgradable to the model 220GF back-mounted graphite furnace for ppb/ ppt trace level analyses

Available autosampler, hydride generator and cold vapor attachments

Internal microprocessor and software can identify samples, perform statistical analysis and graphically display calibration curves and transient peaks (Hydride generation & Graphite furnace)

210VGP Atomic Absorption Spectrophotometer

210VGP Atomic Absorption Spectrophotometer
Buck Scientific's 210VGP Atomic Absorption Spectrophotometer is the culmination of more than 20 years success and experience as a manufacturer of spectroscopy instruments. The 210VGP is a powerful, compact and cost effective solution to all atomic analyses. It has been designed to meet the performance and flexibility your laboratory requires—now and in the future.

Standard Features
The 210VGP is shipped ready for use. All operating conditions are preloaded 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 staywarm/operating facilities for each lamp. Direct report generation to a printer or data linking to the optional AAnalyze software package is easily done using the parallel and RS232C ports.

Analytical Performance
The Buck 210VGP 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.

On-board Microprocessing
The completely integrated firmware found in the Buck 210VGP gives absolute control of operation and data manipulation. From setting lamp parameters to optimizing calibration curves and furnace temperature/time programs; the internal firmware provides access to all of the system settings.

Cost Effectiveness
The 210VGP is designed for minimal maintenance. The burner assembly is easily accessible for quick cleaning. The microprocessor uses state-of-the-art components and is machine assembled for quality and reliability.

With the best performance-to-price ratio in the market, the 210VGP is truly an affordable instrument that will maximize your return on investment.

Optical System
Buck Scientific's “Stable Beam” System creates an optimum optical alignment. We have the lowest number of energy reducing optics (no energy wasting beam splitters) for the greatest throughput of sample energy.

Background Correction
The Model 210VGP offers two exceptional background correction systems; a unique, in-line D2 system and Variable Giant Pulse (VGP) correction.

Deuterium (D2) Continuum Lamp Correction
A D2 lamp emits radiation from the far-UV region (<190nm through approximately 350nm). With our proprietary in-line system, the D2 emission corresponds precisely with the spectrum of the analyte. Using modulated signals, the absorbance of analyte and background interferences are ratioed resulting in a clean, unbiased
absorbance signal.

Variable Giant Pulse (VGP) Correction
Hollow cathode lamps normally operate at currents of 3-15 mA. If the applied power is raised to several hundred mA, they exhibit a phenomenon called self-reversal. This giant pulse of current changes the nature of the analyte absorption line so it will only measure the background absorbance. Like D2 correction, the background absorbance is subtracted from the total signal to give the corrected sample reading. The VGP system removes interferences for elements outside the normal D2-UV region.

Buck's unique internal software allows the user to vary both modes of the background correction to optimize the analysis for selected elements.

210VGP/220 Stabilized Temperature Graphite Furnace AA

Unique Furnace Design
The Model 220 GF accessory is the latest technology in PPB level analyses by graphite furnace AA. This fully integrated design uses an innovative, unique technology in a compact powerful furnace module. The quick-mount design permits rapid changeover between furnace and flame heads.

Capabilities
The unique power supply in our furnace is capable of generating temperatures up to 3000°C in less than a second! This ultra-fast heating rate provides superior sensitivity in refractory elements and carbide-forming metals. The on-board firmware gives the analytical chemist full control of all aspects of the analysis. Gas flows (external, internal, mini-internal and auxiliary are standard), data collection (integrated, real-time, peak height or absorbance area) and electronic parameters for the hollow cathode lamps and the various background correction routines can all be programmed by the operator for maximum results.

Methods
The Stabilized-Temperature Graphite Furnace AA (STGFAAS) procedure insures the highest accuracy and reproducibility. The 210VGP can initiate multistep sequences with alternate gas purging for fully optimized STGFAAS.

System Integration
The integration of the controlling software with the furnace module is comprehensive, and methods development time can easily be cut in half by using our protocols to refine an analytical method. The Model 220AS random-access autosampler will fully automate your analytical operations without the need for an external PC to control the system. By incorporating a sample ID table within the software, complete data handling can be done internally.

Options and Accessories

Model 420 Continuous Flow Hydride
The Model 420 hydride accessory provides virtually instant access to PPT detect ability for hydride metals in a semi-automated, continuous flow system. Low level determinations of As, Se, Sb, Bi, Te, Sn, and Ge are easily performed. The cold vapor mercury model achieves trace level analysis.

Model 220AS Furnace Auto sampler
Complete system automation can be achieved using the Model 220AS Auto sampler. This fully programmable, random access system provides 40 sample cups and eight calibration/QC cups. It can also perform automatic matrix modifier additions and sample dilutions. Sample cups can be identified in the built-in table, and method development time can be reduced substantially.

Model 240 Flame Auto sampler
To enhance laboratory productivity, this 150 position auto sampler features a fast access rate for unattended operation. Users can program various dilution and sample volumes with automated spike addition. A high quality coating resists acids and bases. Full random access allows for complete flexibility.

AAnalyze™ Data Acquisition Software
Provides automated data collection via RS232C, conforming to all EPA protocols. Data handling capabilities include auto calibration, spike recoveries, drift corrections, and QC charting. Calibrations are performed using linear or polynomial regressions in a Windows®-based, easy to use format. Full report generation with calibration curves and QC chart printouts as well.

205 Atomic Absorption Spectrophotometer

The Buck Scientific 205 AAS uses a unique burner system to get more sample to the flame, which results in more signal and better sensitivity. We use an impact bead nebulizer to get an efficient generation of a fine aerosol of sample solution. The short path spray chamber permits difficult solutions containing organics or high dissolved solids to be aspirated with superb precision and minimal instabilities. To take advantage of this enhanced signal, we designed an optical layout that provides the highest throughput of any commercially available spectrophotometer. Our very simple straight line optical path uses a monochromator with a single reflector mirror. This cuts down on the amount of light loss often associated with models having 10 or more mirrors. Because of this the Buck 205 AAS can detect far-UV elements, such as arsenic and selenium, with ten times greater sensitivity.

Features:

• Internal microprocessor and software can identify samples, perform statistical analysis and graphically display calibration curves.
• Dual lamp power, one for warm up
• High throughput "Stable Beam" optical system
• Modulated HCL power supply to cancel DC emission from flame
• Digital readout for absorbance, emission, direct concentration, lamp currents and PMT voltage