Atomic absorption spectrometer (AAS)
ST-AAS 7000 Series U-Therm International (H.K.) Limited

I. APPLICATION
The ST-AAS-7000 series atomic absorption spectrophotometer is widely used in various fields like gold, petrochemical, geology, medical, environmental protection, scientific research, agriculture, disease control, food, materials science, commodity inspection and so on.

II. FEATURES
 Advanced optical system
 The world's first integrated design
 Automatic quickly switch
 Reliable safety protection system
 Excellent scalability
 High automation

VII. Technical parameters
 Optical system
Wavelength range 190 ~ 900nm
Monochromator C-T grating monochromator
Wavelength repeatability ≤0.1nm (ST-AAS-7002, ST-AAS-7003)，≤0.2nm (ST-AAS-7000, ST-AAS-7001)
blaze wavelength 250nm
Resolution better than 0.3nm
Spectral Bandwidth 0.1, 0.2, 0.4, 1.0, 2.0 nm five-speed auto switching (ST-AAS-7002, ST-AAS-7003)
Wavelength accuracy ± 0.2nm
Grating grooves 1800 / mm
Baseline stability ≤ ± 0.004A/30min (dynamic), ≤ ± 0.002A/30min (static)

 Flame analysis
Cu characteristic concentration ≤ 0.02 μg / ml
Precision RSD ≤ 1%
Position adjustment Best regulation for height and angle, replace Flame / hydride in 1min.
Detection limit ≤ 0.005 μg / ml
Combustion head 50* 100mm interchangeable all-titanium burner head, all-titanium spray chamber

 Graphite furnace analysis
Cd features volume 0.5×10－12g
Temperature range room temperature~3000 ℃
Temperature program Temperature program up to 20 bands, ladder, ramp, Maintain the three kinds of heating methods.
Heating modes maximum power heating and light-controlled rapid heating
Detection limit 0.5×10－12g
Precision RSD ≤ 2%
Ramp rate ≥ 2000 ℃ / sec.