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      Atomic Absorption Spectrophotometer LX704AAS

      Atomic Absorption Spectrophotometer LX704AAS

      Email: info@labdex.com website: www.labdex.com

      Description

      Atomic Absorption Spectrophotometer LX704AAS is an integrated flame/graphite furnace atomization system where the graphite system is fully automatic. They analyze the concentration of elements in a liquid sample based on energy absorbed from certain wavelength of light. They are equipped with turrets that can hold multiple lamps to reduce downtime between samples or allow for sequential analysis.

      Specifications

      Wavelength range 190-900nm
      Wavelength accuracy ≤±0.25nm
      Wavelength repeatability ≤±0.15nm
      Spectral bandwidth ≤±0.02nm
      Stability of baseline
      StaticZero drift of baseline≤0.005Abs/30min, Baseline transient noise≤0.001Abs
      DynamicZero drift of baseline≤0.005Abs/10min, Baseline transient noise≤0.005Abs
      Light source system
      Lamp turretMotorized 8-lamp turret
      Lamp current adjustmentWide pulse current: 0~25mA
      Narrow pulse current: 0~10mA
      Lamp power supply mode400Hz square wave pulse
      100Hz narrow square wave pulse+400Hz wide square wave pulse
      Optical system
      MonochomatorSingle beam, Czerny-Turner design grating monochromator
      Grating1800 lines/mm
      Blazed wavelength250nm
      Focal length277mm
      Spectral bandwidth0.1nm, 0.2nm, 0.4nm, 1.2nm, auto-switch over
      Graphite furnace
      Temperature rangeRoom temperature~3000℃
      Heating rate3000℃/s
      Graphite tube dimensions28mm(L)×8mm(OD)
      Characteristic massCd≤0.5 ×10-12g, Cu≤5 ×10-12g, Mo≤1×10-11g
      PrecisionCd≤3%, Cu≤3%, Mo≤4%
      Detection and Data processing system
      DetectorR928 Photomultiplier with high sensitivity and wide spectral range
      SoftwareUnder windows operating system
      Analytical methodWorking curve auto-fitting; standard addition method; automatic sensitivity correction, automatic calculation of concentration and content
      Repeat times1-99 times, automatic calculation of mean value, standard deviation and relative standard deviation
      Multi-task functionsSequential measurement for multi-element determination to the same sample
      Condition readingWith model function
      Result printingMeasurement data and final analytical report printout, editing with Excel
      Communication portStandard RS-232 serial port communication
      Graphite furnace autosampler
      Sample tray capacity55 sample vessels and 5 reagent vessels
      Vessel materialPolypropylene
      Vessel volume3ml for sample vessel, 20ml for reagent vessel
      Minimum sampling volume1μl
      Repeatable sampling times1 -99 times
      Sampling systemAccurate dual pump system, with 100μl and 1ml injectors
      Function expansion Hydride vapor generator can be connected for hydride analysis
      Power requirement for main unit Monophase alternating current, 220V, average power dissipation≤0.3kVA
      Power requirement for accessories Monophase alternating current, 220V, peak power dissipation 0.3kVA
      Packing dimension (L x W x H) and Gross weight Main unit: 1280 x 750 x 830 mm, 150 kgs Graphite furnace power supply: 660 x 600 x 800 mm, 70 kgs Graphite furnace auto-sampler: 540 x 440 x 420 mm, 22 kgs
      Features
      • The changeover of the integrated flame and graphite furnace atomizer is automatically controlled featuring easy operation and time saving which eliminates human labor
      • To perform flame emission analysis, flame emission burner head can be installed for alkali metals as K, Na etc.
      • Provided with automatic 8-lamp turret, automatic adjustment of lamp current and optimization of light beam position
      • Parameters like Wavelength scanning, peak picking, change in spectral bandwidth, optimization of position parameters, automatic ignition and gas flow setting are done automatically
      • The graphite furnace analysis is fully reliable and automatic, dual curve mode light-controlled temperature control technique, temperature auto-correction technique, ensures fast heating, good temperature reproducibility and high analytical sensitivity
      • Graphite furnace with pneumatic control and pressure lock ensures constant pressure and reliable contact
      • Automatic standard sample preparation, automatic correction of sampling probe depth, automatic tracing and correction of liquid surface height in the sample vessel, with sampling accuracy of 1% and reproducibility of 0.3%
      • Equipped with alarm and automatic protection to fuel gas leakage, abnormal flow, insufficient air pressure and abnormal flame extinction in flame system
      • Protection function and alarms for insufficient carrier gas and protective gas pressure, insufficient cooling rate supply and over-heating in graphite furnace system
      • AAS analysis is made under windows operating system which is easy-to-use with fast parameter setting and optimization
      • In order to increase the sensitivity in flame analysis, two high performance HCLs can be mounted on the lamp turret
      • Data processing system: provided with analytical methods – Working curve auto-fitting standard addition method, automatic sensitivity correction, automatic calculation of concentration and content with windows operating system software
      • Experiments can be repeated 1~99 times along with automatic calculation of mean value, standard deviation and relative standard deviation
      • Equipped with multi task functions- sequential determination of multi-elements in the same sample, condition reading- with model function and result printing- measured data and final analytical report printout in excel
      • Provided with standard RS-232 serial port connection
      Applications
      • Used for testing the metal element concentration analyze in agriculture, chemical, environmental study, food, mining, and petrochemical, pharmaceutical industry.
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