原子吸收光谱仪

进口205型原子吸收光谱仪

205 atomic absorption spectrophotometer

energetic evolution:

the line of atomic absorption spectrophotometers were designed to utilize the maximum energy of the single beam optical system. this allowed us to build a smaller, less expensive and more sensitive instrument. background correction was achieved by in-serting the deuterium lamp directly after the hollow cathode lamp and using variable giant pulse.

the 200 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.

standard features：

the 200 series aa’s are 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.

analytical performance：

the 200 series aa’s are 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-se-lectable 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.

cost effectiveness：

the 210/211 is designed for minimal maintenance. the burner assembly is easily accessible for quick cleaning. the microprocessor uses stateof-the-art components and is machine assembled for quality and reliability. with the best performanceto- price ratio in the market, the 210/211 is truly an affordable instrument that will maximize your return on investment.

fully integrated safety interlocks for gas pressure sensor, drain line trap and ignitor insures safe operation of the 211aas

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 change over 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, 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 & reproducibility.

the 210/211 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 auto-sampler 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.

onboard software：

on-board microprocessing the completely integrated firmware found in the 210/211 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.

205aas：

the 205 aas is the next evolution of the highly successful buck 210vgp. the 205 is a rugged, economical and highly sensitive instrument which is perfect for industrial, educational and qc operation.

internal microprocessor generates calibration curvewith graphical and tabular formats

• 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

• autozero, integration and high gain damping features

• bandpass resolution from 0.2 - 0.7 - 2.0 nm

• burner safety interlock system for nitrous oxide/acetylene flame operation

• high sensitivity detection using quartz pmt detector

• analog and digital output for chart recorders & pc data systems

• compact size and rugged design

the 205 advantage：

the 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 multiple mirrors. because of this, the 205 aas can detect far into the uv elements, such as arsenic and selenium, with ten times greater sensitivity.

instrument specifications：

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 two 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 se-lectable 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