DW-AAS-200 Atomic Absorption Spectrophotometer

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.)

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.  

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

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~3000ºC

Heating rate

   2000℃/s

Graphite tube dimensions

28mm (L) x 8mm (OD)

Characteristic mass

Cd≤0.8 ×10-12g, Cu≤5 ×10-12g, Mo≤1×10-11g

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

1μl

Repeatable sampling times  

1~99 times

Sampling system

Accurate dual pump system, with 100μl and 1ml injectors.

Characteristic Concentration and Detection Limit

Air-C2H2 flame

Cu: Characteristic concentration ≤ 0.025 mg/L, Detection limit≤0.006mg/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