Atomic Absorption Spectrometers

• High performance, automated instrument designed to meet the requirements of the modern laboratory.
• Applications include agriculture, clinical, environmental, food, metal, mining and petrochemical.
• Three configurations: AA500F (flame atomizer only), AA500G (graphite furnace atomizer only) and AA500FG (both flame and graphite furnace atomizers).
• AA500F: Three flames available: Air/acetylene is standard, N2O/acetylene or air/LPG (natural gas) are available as options. All 3 flame configurations offer coded burner for full safety protection.
• AA500G: Graphite head is fixed into the optical path to maximise performance and eliminate drift. The transversally heated graphite tube is efficiently heated and cooled due to the precision feedback system.
• AA500FG: Both the flame and graphite furnace atomizer configurations are installed and can be changed over by a simple selection in the AA-Win software.
• Embedded PC system built into the unit. Windows 7 processional operating system.
• Pre-installed AA-Win software provides full software control of the instrument and autosampler.
• Automatic 8 lamp turret controlled and optimized by the AA-Win software.
• D2 lamp and self reversal background systems.
• High precision minimal optics ensures maximum light throughput to the computer controlled Czerny-Turner monochromator.
• A universal autosampler is available which is conveniently mounted to the front of instrument.
• Absorption and Emission modes are standard as well as peak height, peak area, sequential and manual integration modes.

FLAME ATOMIZER FEATURES:

• Air/Acetylene: this flame uses a 100mm single slot burner for standard configuration. The high sensitivity (Cu 2ppm > 0.28A) is due to the efficiency of the fixed position glass nebuliser. An acid-resistant replacement is available as an option.
• N2O/Acetylene: The burner for this gas has a 50mm slot and is used to measure elements less prome to ionization such as aluminum, tin, titanium, calcium and vanadium. The switchover from air/acetylene and flame off is fully computer controlled.
• Air/propane (LPG): This flame uses a 3 slot burner and with the low pressure requirement, it is much safer to operate. Due to the lower temperature, it is ideal for analyzing alkali metals such as potassium, sodium and lithium, especially when used in the Emission mode.
• There are some remote areas in the world that have difficulty obtaining acetylene or even a high enough purity to operate the flame, so LPG can give a real alternative and offer comparable results throughout the wavelength range.
• Safety features include gas pressure monitoring for all gases, burner identification, flame sensor, drain trap level sensor, low gas pressure sensor, power loss protection, gas leak detector and safety cut-off switch.

GRAPHITE FURNACE ATOMIZER FEATURES:

• Available in 2 formats:

o (AA500G) Graphite furnace head is fixed into the light path.
o (AA500FG) Graphite furnace head is fixed behind the flame atomiser assembly and is motorised into position by the software.

• Transverse head is heated and cooled efficiently due to the feedback system and has been designed to reduce analytical problems normally associated with this type of technique.
• Pyrolytically coated graphite tubes are manufactured to improve performance and increase the analytical life.
• Platform tubes are supplied and will accept volumes up to 20µl.
• Up to 10 heat stages available. These can be set up and stored in the AA-Win software.
• Graphite furnace tube is cooled by an optional water circulation system.
• Safety features include argon gas pressure sensor, water flow sensor and over-temperature sensor.

Specifications:

• Wavelength range: 190 to 900nm.
• Spectral bandwidth: 0.1nm, 0.2nm, 0.4nm, 1.0nm, 2.0nm (software selectable).
• Wavelength accuracy: ±0.15nm.
• Wavelength reproducibility: <0.05nm.
• Resolution: 0.2nm ± 0.02nm.
• Baseline stability: 0.005A/30min.
• Sensitivity (Cu): 2µg/ml Absorption > 0.28A (flame)
• Detection limit: Cu < 0.004 µg/ml (flame) Cd < 0.4 x 10-12g (graphite furnace).
• Repeatability: Cu < 0.7% (air/acetylene flame); Ba < 1.0% (nitrous oxide/acetylene flame); Cu < 2.0% Cd < 2.0% (graphite furnace).
• Background correction: deuterium arc, self reveral.
• Characteristic concentration: Cu < 0.02 µg/ml, Ba < 0.15 mg/ml (N2O/acetylene).
• Burner heads: Titanium alloy.
• Nebuliser: High-efficiency glass, acid proof available as an option.
• Atomization chamber: corrosion-resistant material.
• Position adjustment: Automatic changeover (AA500GF) manual (AA500F). Automatic setting of optimum height for flame burner.
• Included Accessories: 500 AAWin2 Software and RS232 cable, 2 glass nebulizers, data coded air/acetylene burner, hollow cathode lamp holders, power lead, 2 gas tubing (1 acetylene and 1 air), drain trap and tubing, various fittings, tool kit, operators manual, system documentation, cook book, pyrolytically coated electrodes with platform, power lead (for graphite PSU), connection cable (for graphite PSU), and pipette and pipette tips.

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