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Instrument Database:
Beijing Rayleigh Analytical Instrument Corporation (BRAIC) - WFX-110A/120A/130A Atomic Absorption Spectrophotometer
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| Year of introduction |
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| Status |
available |
| Company |
Beijing Rayleigh Analytical Instrument Corporation (BRAIC)
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| Categories |
Spectrometer ( Atom. ): AAS: Flame/Furnace
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FEATURES
- The patented flame analysis technique adopting oxygen-rich air-acetylene flame as the substitution for nitrous oxide-acetylene flame for high temperature element analyses. (Only for WFX-110A)
- Automatic hollow cathode lamp changeover. The high performance HCL can be used directly.
- Auto-changeover and position optimization of integrated flame/graphite furnace atomizer.
- Auto-ignition, automatic spectral bandwidth selection. · Fully automated wavelength scanning and peaking
- Light-controlled graphite furnace power supplier, adopting FUZZY-PID temperature control technique and dual curve working mode, ensures fast heating, accurate and stable temperature control and good temperature reproducibility. Temperature auto-correction function provided.
- Graphite furnace with pneumatic control and pressure lock ensures constant pressure and reliable contact.
- Perfect safety protection measures, alarm and automatic safety protection to fuel gas leakage, air pressure deficiency and abnormal flame extinction; spray chamber made of explosion-proof material, all-titanium burner and explosion-proof stopper for flame analyses; alarm and protection function to argon pressure deficiency, insufficient cooling water supply, over-heating and over-current etc. in graphite furnace analyses.
- Adopting large-scale programmable logic array and Inter IC bus technique and highly reliable adapters for electric design.
- Easy and flexible WINDOWS operating system, with multi-windows processing technology to observe the signal profile, the measured results and the calibration curve at the same time. Various analytical programs, data, signals and graphics can all be stored for later use.
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| Specifications |
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Main Specification
Wavelength range
190-900nm
Wavelength accuracy
±0.25nm
Resolution
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
≤0.004A/30min
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-110/120), 4-lamp turret (WFX-130) auto alignment, fully automated scan and peak-picking.
Lamp current adjustment
Automatic adjustment and display. Wide pulse current: 0~25mA, Narrow pulse current: 0~10mA
Lamp power supply mode
Powered by two pulses simultaneously
Optical System
Monochomator
Single beam, Czerny-Turner design grating monochromator
Grating
1800 l/mm
Focal length
277mm
Blazed Wavelength
250nm
Spectral Bandwidth
0.1nm, 0.2nm, 0.4nm, 1.2nm automatic change.
Atomizer
Flame/Graphite furnaceFlame/Graphite furnace atomizer auto changeover
Detection and Data Processing System
Detector
Photomultiplier with high sensitivity and wide spectral range.
Software
Ms-Windows 98/Me operating system
Analytical method
Working Curve Method (1st order and 2nd order fitting), Sensitivity auto-correction, Standard Addition Method.
Concentration
Auto-calculation of concentration and content
Repeatable measurement
Maximum 20 times of repeat measurement, automatic calculation of mean value, standard deviation and relative standard deviation.
Multi-task function
Sequential measurement of multi-elements in one sample
Condition reading
With model function
Result printing
Measurement data and final analytical report printout, editing with Excel.
Flame Analysis
Burner
10cm single slot all-titanium burner
Spray chamber
All-plastic spray chamber.
Nebulizer
High efficiency glass nebulizer with metal sleeve.
Position adjustment
Adjusting mechanism for vertical, horizontal positions and the rotation angle of the burner.
Protection for gas system
Fuel gas leak protection, abnormal flame extinction alarm, air-pressure deficiency protection and explosion-proof device.
Flame ignition
Automatic
Characteristic Concentration and Detection Limit
Normal Air-C2H2 flame
Cu: Characteristic concentration≤0.025mg/L, Detection limit≤0.006mg/L;
Oxygen-rich Air-C2H2 flame
Ba: Characteristic concentration ≤ 0.22mg/L Al: Characteristic concentration ≤ 0.4mg/L (for WFX-110A)
Hydride generation
Hg: detection limit≤0.5ug/L
Graphite Furnace Analysis
Temperature range
20~3000ºC
Light-controlled temperature range
1500ºC -3000ºC, temperature auto-correction
Temperature control accuracy
≤1%
Heating rate
2000°C/s
Characteristic mass
Cd≤0.5 ×10-12g, Cu≤5 ×10-12g, Mo≤1×10-11g
Precision
RSD≤4%
Safety protection
Protections for over-heating, over-current, and less cooling water and argon pressure monitoring functions
Power Supply
220V, 200W
Dimensions
1020 (L) × 492 (W) × 537 (H) mm (main unit) 420 (L) × 420 (W) × 460 (H) mm (graphite furnace)
Weight
Unpacked 80kg (main unit), 50kg (graphite furnace)
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