UV Vis Double Beam Spectrophotometer

Optical System

Wavelength range

190-900nm

Monochromator

Aberration poor C-T monochromator.

Dispersing components

Planar diffraction grating,1800line/mm,scoring area(40*40)mm²

Spectral bandwidth

0.1, 0.2, 0.4 ,1.0, 2.0nm there are five gear can be choosed automatically

Wavelength accuracy  

Better than±0.15nm in the full band

Wavelength repeatability    

In the full band<0.10nm

Baseline drift

0.004A/30min

Detector   

High sensitivity,wide spectral range photomultiplier tube

Resolution

It can distinguish manganese lamp279.5nm and 279.8nm(double lines) and the energy less than 20%.

Elements of light stand

Lamp automatically converted,there is no need manual adjustment

Flame atomic system

Characteristic viscosity(Cu)

0.02ug/ml/1%

The detection limit (Cu)

0.005ug/ml

Burner

100mm titanium metal burner,air-cooled pre-mixed type

Precision

RSD≤0.8%

Sprayer

Efficient glass atomizer

Spraying room

Corrosion-resistant material spray chamber

Position adjustment

Flame burner’s best height and before and after location can be automatically set

The safety system

 There are many automatic security features

Graphite furnace atomization system

Characteristic amount(Cd)

0.5×10^-12g

The detection limit(Cd)

1.0×10^-12g

Precision

RSD≤3%  

Heating temperature range

Room temperature~3000℃

Heating temperature control method

Drying and ashing power control mode, atomization stage using light-controlled maximum power mode

The control accuracy of temperature

accuracy≤1%

Heating rate

>2000℃/s

Heating condition set

Up to 11 programs, ramp heating,stage heats up,the maximum power heating

Safety protection    

It has argon under-voltage indication,there is not enough cool water,overheat. Over-current alarm and automatic protection function.

Background correction

Background correction of deuterium lamp

1A≥30times

Background correction of self-absorption    

 1A≥30times

Data processing

The measurement method

Air-acetylene flame method, hydride generator atomic absorption method, oxygen rich- air acetylene flame method, graphite furnace method.                                            

Concentration calculation method

The standard curve method(1-3times), the standard join law method, interpolation method.

Repeat measurement times

1~20times,to calculate the average value needed to measure repetability, the standard deviation and relative standard deviation are given automatically.

The results of printing  

The parameter printing,the results of data printing,graphic printing , summary report

The environment of soft

 Windows 98/2000/XP/Win7