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    Room 1015,Beijing Research Institute of Meha-
    nical & Electrical Technology,No.18 Xueqing Road,
    Haidian District,
    Beijing,P.R. China 100083

    WFX-110A/120A/130A Flame/Graphite Furnace Atomic Absorption Spectrophotometer


    1 Innovated rich oxygen air-acetylene flame analysis technique(WFX-110A):

    The patented flame analysis technique adopting rich oxygen air-acetylene flame as the substitution for nitrous oxide-acetylene flame for high temperature element analyses, such as Ca, Al, Ba, W, Mo, Ti, V, etc. Flame temeperature is continuously adjustable between 2300-2950, with makes it possible to choose the best atomization temperature for different elements. It features easy operation, low analysis cost and wide flame AAS analytical range. Rich oxygen flame will not pollute the environment and is not harmful to human bodies. It's break-through in flame AAS analysis

    2 Integrated flame/graphite furnace atomization system, changeable with flame emission burner

    2.1 Automatically controlled changeover of the integrated flame and graphite furnace atomizer featuring easy operation and time saving eliminates human labor.

    2.2 A flame emission burner head can be installed to perform flame emission analysis to Alkali metals as K, Na etc.(WFX-110A/120A)

    3 Accurate fully automated control system

    3.1 Automatic multi-lamp turret, automatic adjustment of lamp current and optimization of light beam position

    3.2 Automatic wavelength scanning and peak picking

    3.3 Automatic spectral bandwidth changing

    3.4 Automatic changeover between flame and graphite furnace operation, automatic optimization of position parameters and automatic ignition

    4 Reliable fully automatic graphite furnace analysis

    4.1 Adopting FUZZY-PID and dual curve mode light-controlled temperature control technique, temperature auto-correction technique, ensures fast heating, good temperature reproducibility and high analytical sensitivity. The temperature ontrol accuracy is less than 1%

    4.2 Graphite furnace with pneumatic control and pressure lock ensures constant pressure and reliable contact

    5 Perfect safety protection measures

    5.1 Alarm and automatic protection to fuel gas leakage, abnormal flow, insufficient air pressure and abnormal flame extinction in flame system

    5.2 Alarm and protection function to insufficient carrier gas and protective gas pressure, insufficient cooling wate supply and over-heating in graphite furnace system

    6 Advance and reliable electronic design

    6.1 Adopting large-scale programmable logic array and Inter I2C bus technology

    6.2 European type sockets and AMP adapters with high reliability to ensure long term reliability of the whole electronic system

    7 Easy and practical analysis software

    7.1 Easy-to-use AAS analysis software is made under Windows operating system, realizing fast parameter setting and optimization

    7.2 Automatic display of measured data, automatic calculation and analytical result automatic print out.


    Main Specification

    Wavelength range


    Wavelength accuracy

    Better than 0.25nm


    Two spectral lines of Mn at 279.5nm and 279.8nm can be separated with the spectral bandwidth of 0.2nm and valley-peak energy ratio less than 30%.

    Baseline stability


    Background correction

    The D2 lamp background correction capability at 1A is better than 30 times

    The S-H background correction capability at 1.8A is better than 30 times.( only for WFX-110A/120A)

    Hollow Cathode Lamps

    Lamp turret

    6-lamp turret (WFX-110A/120A), 4-lamp turret (WFX-130A); Auto-alignment, fully automated scan and peak-picking.

    Lamp current adjustment

    400Hz square wave pulse

    Wide pulse current: 0~25mA,
    Narrow pulse current: 0~10mA

    Lamp power supply mode

    400Hz square wave pulse;

    100Hz narrow square wave pulse+400Hz wide square wave pulse (WFX-110A/120A)

    Optical System


    Single beam, Czerny-Turner design grating monochromator


    1800 l/mm

    Focal length


    Blazed Wavelength


    Spectral Bandwidth

    0.1nm, 0.2nm, 0.4nm, 1.2nm, automatic change

    Flame Atomizer


    10cm single slot all-titanium burner

    Spray chamber

    Corrosion resistant all-plastic spray chamber


    High efficiency glass nebulizer with metal sleeve, sucking up rate:6-7ml/min

    Emission burner provided with WFX-110A/120A

    Graphite Furnace

    Temperature range

    Room temperature~3000ºC

    Heating rate


    Graphite tube dimensions


    Characteristic mass

    Cd0.5 10-12g, Cu5 10-12g, Mo110-11g


    Cd3%, Cu3%, Mo4%

    Detection and Data Processing System


    R928 Photomultiplier with high sensitivity and wide spectral range.


     Windows operating system

    Analytical method

    Working curve auto-fitting; standard addition method; automatic sensitivity correction, automatic calculation of concentration and content.

    Repeat times

    Maximum 20 times of repeat measurement, automatic calculation of mean value, standdard deviation and relative standard deviation.

    Multi-task Functions

    Sequential measurement for multi-element determination in one sample

    Condition reading

    With model function

    Result printing

    Measurement data and final analytical report printout, editing with Excel

    Standard RS-232 serial port communication

    Characteristic Concentration and Detection Limit

    Normal Air-C2H2 flame

    Oxygen-rich Air-C2H2 flame

    Cu: Characteristic concentration0.025mg/L, Detection limit0.006mg/L;

    Ba:  Characteristic concentration 0.22mg/L

    Al:   Characteristic concentration 0.4mg/L

    Function Expansion

    Hydride vapor generator can be connected for hydride analysis

    Dimensions and weight

    Main unit

    1024954cm, unpacked 80kg

    Graphite furnace

    424246cm, unpacked 50kg