DW-AAS-110A/120A/130A Graphite Furnace/Flame Atomic Absorption Spectrophotometer

Main Specification

Wavelength range

190-900n

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 (DW-AAS-110A/120A),             4-lamp turret (DW-AAS-130A)

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

400Hz square wave pulse

100Hz Narrow square wave pulse + 400Hz wide square wave pulse (DW-AAS-110A/120A)

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.

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 with DW-AAS-110A/120A

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

Windows operating system

Analytical method

Working curve auto-fitting; standard addition method; automatic sensitivity correction; automatic calculation of concentration and content.

Repeat times

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.

Standard RS-232 serial port communication

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)

Function Expansion

Hydride vapor generator can be connected for hydride analysis.

Dimensions and weight

1020 (L) × 490(W) × 540 (H) mm (main unit), unpacked 80kg

420 (L) × 420 (W) × 460 (H) mm (graphite furnace), unpacked 50kg