AA-7090 Series Atomic Absorption Spectrometer

 

Technical Specifications of AA-7090

 
1.    Optics
 
Wavelength Range: 190nm~900nm
 
Bandwidth: 0.1, 0.2, 0.4, 1.0 and 2.0nm, automatic switch Czerny-Turner Grating Mono-chromator
 
Wavelength Accuracy/Indication Error: ±0.1nm Wavelength Repeatability: ≤0.05nm
 
Grating: 1800 lines/mm Blaze Wavelength: 250nm
 
Baseline Stability: Static baseline stability≤0.002A/30min, dynamic baseline
 
stability≤0.003A/30min
 
Resolution: Better than 0.1nm
 
2.    Flame System
 
Characteristic Concentration of Cu: ≤0.02 μg/mL/1% Detection Limit: ≤0.003 μg/ml
 
RSD≤0.45%
 
Burner Head: Switchable 50 mm and 100 mm titanium burner head,
 
titanium nebulizer and high performance glass nebulizer
 
Position Control: Optimization of height and angle, flame and hydride switch within one min
 
3. Graphite Furnace System
 
Characteristic Concentration of Cu: ≤0.5×10^-12 g

 
Detection Limit: ≤1×10^-12g
 
RSD≤3.0%
 
Temperature Control: Max 20 step temperature program. 3 modes of temperature rise: step, slope and flat.
 
Heating Mode: power heating Heating Rate ≥2500℃/s
 
4. Background Correction
 
Background correction is available for both flame and graphite furnace methods. Deuterium lamp for flame. deuterium lamp or Zeeman for graphite furnace.
 
Correction Mode: Deuterium lamp, Zeeman Correction Capability:
 
a)  Deuterium lamp: When background absorption approaches 1.0 Abs, the instrument is capable of a background correction of 60 times or more.
 
b)  Zeeman: When background absorption approaches 2.0 Abs, the instrument is capable of a background correction of 100 times or more.
 
5.    Data Processing
 
Measurement Methods: Flame absorption, flame emission, graphite furnace, and hydride method.
 
Analysis Method: Linear fitting, nonlinear fitting, standard addition method. Printing Output: Calibration curve, spectrum, analysis conditions, analysis parameters, and analysis results can be automatically stored and printed.