Atomic Absorption Spectrophotometer

• 8-lamp turret automatically rotates, switches and collimates, with 2 lamp positions for high performance lamps.
• 1-8 lamps power on and preheating at the same time.
• Lamp power supply modes: 400Hz square wave pulse; 1OOHz narrow square wave pulse + 400Hz wide square wave pulse.
• Lamp current range: wide pulse 0-15mA; narrow pulse 0-10mA.

• Czerny-Turner type monochromator
• Plane diffraction Grating: Groove 1800 lines/mm, blazed at 250nm
• Focal Length: 277mm
• Spectral Bandwidth: 0.1 nm, 0.2nm, 0.4nm, 0.8nm, 1.6nm automatic switch-over
• Automatic wavelength scanning peak-picking, automatic slit width setting, automatic energy and wavelength optimization.

• Longitudinal heating GF system with temperature up to 3000℃, heating rate more than ℃／s.
• Two temperature control modes selectable: optical and constant voltage. Both slope and step heating program are available. The temperature control accuracy is less than 1%.
• Fully automatic GF height and horizontal position setting and optimization.
• Inner gas, external gas and make up gas are controlled separately. Circulating water and gas-flow control and monitoring system are equipped.
• Graphite furnace pneumatic control and pressure lock ensures constant pressure and reliable contact.
• Different types of graphite tubes can be used. Graphite tube dimensions: 28mm x 8mm. 

• 10cm single-slot Ti burner head for flame absorption; emission burner for flame emission.
• Direct forming spray chamber with corrosion-resistant material PPS
• Burner head height and horizontal position automatic setting and optimization, burner angle rotatable. (Model A)
• Burner head height push-button adjustable and horizontal position manually adjusted, burner angle rotatable. (Model B )
• Automatic ignition with high precision mass flow control system, realizing fully automated fuel gas flow control and adjustment.

• Large-scale programmable logic array inter-chip bus technology, high reliability European socket, AMP and other electrical connectors
• Imported photomultiplier with high sensitivity and wide spectral range
• Analysis software compatible to Win7/Win8/Win10 OS
• Convenient parameter setting, automatic measurement data display, automatic curve-fitting, standard add仆ion method, automatic concentration and content calculation, repeat times 1-99, automatic calculation of average value, standard deviation and RSD etc.
• Multi-task analysis, capable of sequentially performing multi-element determination to the same sample
• Measurement data and final analysis report print-out, Excel editing
• Built一in expert database system facilitates the solution of various problems in the process of analysis.
• Standard USB communication.

Wavelength  Range:190-900nm

Wavelength  accuracy  and   reproducibilty

• Wavelength  accuracy: better  than±0.20nm
• Reproducibility: better  than  0.06nm

 Resolution: 0.2nm±0.02nm,

• Two spectral lines of Mn at 279.5nm and 279.8nm can be separated with the spectral bandwidth of 0.2 and valley-peak energy ratio less than 25%.

Baseline   Stability

• Static:baseline drift ≤0.003Abs/30min, instant、Instantaneous noise ≤0.0005Abs
• Dynamic:baseline  drift  ≤0.003Abs/15min、Instantaneous  noise≤0.003Abs

Cu  determination  by  flame

• Detection limit ≤0.003 μg/mL 
• Sensitivity  ≤0.03μg/mL/1%   
• Precision  ≤0.5%
• Linear correlation coefficient ≥0.9998, Linear range ≥0.65Abs

Cd  determination   by  graphite  furnace

• Detection limit ≤0.5pg 
• Sensitivity ≤0.6pg
• Precision≤2.8%
• Linear correlation coefficient ≥0.9994

Background   Correction

• D2 lamp background correction capability at 1A is better than 30 times. 
• S-H background correction capability at 1.8A is better than 30 times.

Dimensions and Net Weight

• AS2500A main Unit:1020mm ×530mm×500mm(L×W×H),90kg
• AS2500B main Unit:1020mm  ×530mm  ×500mm(L×W×H),85kg
• AS2500  GF Power Supply:350mm  ×530mm  ×430mm(L×W×H),50kg

Power Supply

• AS2500A main unit : Single phaseAC,110V/220V,max power consumption:0.2kVA
• AS2500B main unit : Single phase AC,110V/220V,max power consumption:0.15kVA
• AS2500 GF  Power Supply:Single  phase AC,220V,max  powerconsumption:5.5kVA