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Element Analyzers

CHNS Analyzer, XRF, AES, OES, Spark-OES, AAS, AFS, ADX

WFX-210 Atomic Absorption Spectrophotometer, AAS

Innovated rich oxygen air-acetylene flame analysis technique 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 temperature is continuously adjustable between 2300-2950 oC, which 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 a break-through in flame AAS analysis.

 

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

  •     Automatically controlled changeover of the integrated flame and graphite furnace atomizer featuring easy operation and time saving eliminates human labor.
  •     A flame emission burner head can be installed to perform flame emission analysis to akali metals as K, Na etc.

 

Accurate fully automated control system

  •     Automatic 6-lamp turret, automatic adjustment of lamp current and optimization of light beam position.
  •     Automatic wavelength scanning and peak picking
  •     Automatic spectral bandwidth changing
  •     Automatic changeover between flame and graphite furnace operation, automatic optimization of position parameters, automatic ignition and automatic gas flow setting

 

Reliable fully automatic graphite furnace analysis

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 control accuracy is less than 1%.

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

Multi-function autosampler features automatic standard sample preparation, automatic correction of sampling probe depth, automatic tracing and correction of liquid surface height in the sample vessel, with the sampling accuracy of 1% and reproducibility of 0.3%, realizing fully automation of graphite furnace analysis.

 

Perfect safety protection measures

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

 

Advanced and reliable electronic design

Adopting large-scale programmable logic array and Inter 12C bus technology European type sockets and AMP adapters with high reliability to ensure long term reliability of the whole electronic system.

 

Easy and practical analysis software

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

Automatic sample dilution, automatic curve fitting, automatic sensitivity correction. Automatic calculation of sample concentration (content), mean value, standard deviation and relative standard deviation calculation.

Multi-elements determination in sequence to the same sample.

Measured data and final results can be printed out and edited in Excel format.

 

Comparison

Characteristic Mass of Some Elements using rich oxygen air-C2H2 flame and other flame methods

Element

Wavelength (nm)

Rich oxygen C2H2 flame

N20-C2H2 flame

Air-C2H2 flame

Ca

422.7

0.009

0.05

0.07

Yb

378.8

0.037

0.08

7.6

Eu

459.4

0.137

0.3

3

Al

309.3

0.4

0.7

 

Sr

460.7

0.016

 

0.15

Ba

553.5

 

0.4

10

Mo

313.3

0.15

0.4

0.8

W

255.1

3.2

5

 

Ga

287.4

0.4

 

 

Sm

429.7

2.92

 

 

La

550.1

37.2

35

 

Sn

224.6

0.8

3

50


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 valleypeak energy ratio less than 30%.
Baseline stability
0.004A/30min
Background correction
The D2 lamp background correction capability at IA 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.)
Lamp current adjustment
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
Optical System
Monochomator
Single beam, Czerny-Turner design grating monochromator
Grating
1800 1/mm
Focal length
277mm
Blazed wavelength
250nm
Spectral bandwidth
0. Inm, 0.2nm, 0.4nm, 1.2nm, auto switch over
Flame Atomizer
Burner
10cm single slot all-titanium burner
Spray chamber
Corrosion resistant all-plastic spray chamber.
Nebulizer
High efficiency glass nebulizer with metal sleeve, sucking up rate: 6-7mL/min
Emission burner provided
Graphite Furnace
Temperature range
Room temperature—3000 oC
Heating rate
20000C/s
Graphite tube dimensions
28mm (L) x 8mm (OD)
Characteristic mass
Cd ≤ 0.8 x 10^-12g, Cu ≤ 5 x 10^-12g, Mo ≤ 1 x 10^11g
Precision
Cd ≤  3%, Cu ≤  3%, Mo ≤  4%
Detection and Data Processing System
Detector
R928 photomultiplier with high sensitivity and wide spectral range.
Software
Under Windows operating system
Analytical method
Working curve auto-fitting; standard addition method; automatic sensitivity correction; automatic calculation of concentration and content.
Repeat times
1—99 times, automatic calculation of mean value, standard deviation and relative standard deviation.
Multi-task Functions
Sequential determination of multi-elements in the same sample.
Condition reading
With model function
Result printing
Measurement data and final analytical report printout, editing with Excel.
Standard RS-232 serial port communication
Graphite Furnace Autosampler
Sample tray capacity
55 sample vessels and 5 reagent vessels
Vessel material
Polypropylene
Vessel volume
3ml for sample vessel, 20ml for reagent vessel
Minimum sampling volume
1 ul
Repeatable sampling times
1 —99 times
Sampling system
Accurate dual pump system, with 100pl and Iml injectors.
Characteristic Concentration and Detection Limit
Air-C2H2 flame
Rich oxygen Air-C2H2 flame
Cu: Characteristic concentration ≤ 0.025 mg/L,
Detection limit ≤ 0.006mg/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
107X49x58cm, 140kg
Graphite furnace
42X42X46cm, 65kg
Autosampler
40X29X29cm, 15kg
WFX-210 Atomic Absorption Spectrophotometer

 

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