Feature of Atomic Absorption Spectrophotometer DW-200
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 eliminate human labor.
- A flame emission burner head can be installed to perform flame emission analysis on Alkali metals such 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.
- The multi-function auto sampler features automatic standard sample preparation, automatic correction of sampling probe depth, automatic tracing, and correction of liquid surface height in the sample vessel, with a sampling accuracy of 1% and reproducibility of 0.3%, realizing full 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 the flame system;
- Alarm and protection function to insufficient carrier gas and protective gas pressure, insufficient cooling water supply, and overheating in a graphite furnace system.
Advanced and reliable electronic design
- Adopting large-scale programmable logic array and Inter I2C 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 the 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.
|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%.
|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
|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 pulse wave.
|Single beam, Czerny-Turner design grating monochromator
|0.1nm, 0.2nm, 0.4nm, 1.2nm, auto switch over
|10cm single slot all-titanium burner
|Corrosion resistant all-plastic spray chamber.
|High efficiency glass nebulizer with metal sleeve, sucking up rate: 6-7mL/min
|Emission burner provided
|Graphite tube dimensions
|28mm (L) x 8mm (OD)
|Cd≤0.8 ×10-12g, Cu≤5 ×10-12g, Mo≤1×10-11g
|Cd≤3%, Cu≤3%, Mo≤4%
|Detection and Data Processing System
|R928 photomultiplier with high sensitivity and wide spectral range.
|Under Windows operating system
|Working curve auto-fitting; standard addition method; automatic sensitivity correction; automatic calculation of concentration and content.
|1~99 times, automatic calculation of mean value, standard deviation and relative standard deviation.
|Sequential determination of multi-elements in the same sample.
|With model function
|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
|3ml for sample vessel, 20ml for reagent vessel
|Minimum sampling volume
|Repeatable sampling times
|Accurate dual pump system, with 100μl and 1ml injectors.
|Characteristic Concentration and Detection Limit
|Cu: Characteristic concentration ≤ 0.025 mg/L， Detection limit≤0.006mg/L;
|Hydride vapor generator can be connected for hydride analysis.
|Dimensions and Weight