Specification :

ATOMIC ABSORPTION SPECTROPHOTOMETER ( AAS )

WFX- 210 Fully Automatic Flame/ Graphite Furnace
Manufacturer : RAYLEIGH
ISO 9001: 2000 & ISO 4001: 2004
CE-TUV

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

Automatic hollow cathode lamp changeover. The high performance HCL can be used directly.
Auto-changeover and position optimization of integrated flame/ graphite furnace atomizer.
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.
High accuracy and reproducibility of the graphite furnace auto-sampler, realizing fully automation of graphite furnace analysis.
Auto-ignition, automatic spectral bandwidth selection.
Fully automated wavelength scanning and peaking
Automatic setting of Gas flow
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.
Standard RS-232 serial interface communication

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.

Specifications

Main Specification
Wavelength range
190-900nm

Wavelength accuracy
Better than ± 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.
Light Source System
Lamp turret
Motorized 6-lamp turret ( Two high performance HCLs can be mounted on the turret to increase the sensitivity in flame analysis.) ; auto alignment; auto fine adjustment; 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 ( wide and narrow) 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, auto-switch over

Atomizer
Flame/ Graphite Furnace
Flame & Graphite Furnace atomizer automatic changeover
Automatic graphite furnace position optimization, automatic flame height setting and horizontal position optimization.
Automatic gas flow setting, alarm and automatic protection function for gas leak, abnormal flow, air-pressure deficiency and abnormal flame extinction, automatic ignition.

Graphite Furnace Autosampler
Sample tray capacity
55 sample cups and 5 cups for matrix modifier

Material of the sample cup
Polypropylene

Volume of the standard cup
3ml for sample, 20ml for matrix modifier

Number of repeatable measurements
Up to 99 times

Sampling system
100ul and 1ml injectors, large flow sampling nozzle rinsing.

Sampling precision and repeatability
Precision: 1% ; Repeatability: 0.3% for min. sampling volume.

Auto-correction
Sampling nozzle auto-correction, sample cup height auto correction.
Detection and Data Processing System
Detector
R928 Photomultiplier with high sensitivity and wide spectral range.

Software
Windows 98/ Windows operating system

Analytical method
Working Curve Method ( 1st order and 2nd order fitting) with automatic sensitivity correction; Standard Addition Method.

Concentration
Auto-calculation of concentration and content

Repeatable measurement
Repeated measurement of up to 99 times, automatic calculation of mean value, standard deviation and relative standard deviation.

Multi-task Functions
Sequential measurement for multi-element determination to the same sample ( Max. 6 elements) .

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
Corrosion resistance All-plastic spray chamber.

Nebulizer
High efficiency glass nebulizer with metal sleeve. Sucking rate 6-7 mL/ min
Burner
10 cm single slot all-titanium burner

Flame Ignition
Automatic

Characteristic Concentration and Detection Limit
Air-C2H2 flame
Oxygen-rich Air-C2H2 flame ( For WFX-210)
Cu: Characteristic concentrationd0.025mg/ L, Detection limitd0.006mg/ L;
Ba: Characteristic concentration d 0.22mg/ L Al: Characteristic concentration d 0.4mg/ L

Graphite Furnace Analysis
Temperature range
Room temperature~ 3000º C
Light-controlled temperature range
1500º C -3000º C, temperature auto-correction

Temperature control accuracy
d1%

Heating rate
2000° C/ s

Characteristic mass
Cdd0.5 × 10-12g, Cud5 × 10-12g, Mod1× 10-11g
Precision
Cdd3% , Cud3% , Mod4%
Safety protection
Protections for over-heating, over-current, and less cooling water and argon pressure monitoring functions
Function Expansion
Hydride Vapor Generator can be connected for hydride analysis
Dimensions and Weight
Main Unit
107x49x55cm, 140 kg

Graphite furnace
42x42x46, 65kg

Autosampler
40x29x29cm, 15kg