1、 Performance indicators of feed atomic absorption spectrometer

1. Optical system
Automatic adjustment of wavelength range 190nm-900nm
Grating engraved line density 1800 lines
Monochromator aberration correction Czerny Turner type monochromator
Spectral bandwidth of 0.1, 0.2, 0.4, 1.0, and 2.0nm, with multiple automatic switching modes
Wavelength accuracy ± 0.20nm
Wavelength repeatability of 0.1nm
Baseline drift static 0.005A/30min dynamic 0.008A/30min
Detector wide spectral range photomultiplier tube
The resolution can distinguish the dual lines of 279.5nm and 279.8nm in the manganese lamp, and the energy of the valley between the two spectral lines should be less than 20%

2. Light source system
Lamp holder 3 lamp holder
Lamp power supply method: 400Hz square wave pulse
Lamp current regulation range 0-10mA average current
3. Atomization system
Flame analysis method
Detection limit (Cu) 0.006 μ g/ml
Burner 100mm all titanium metal burner
Precision RSD ≤ 1%
Spray metal sheathed high-efficiency glass spray
Corrosion resistant all plastic atomization chamber
The safety measures have multiple automatic safety protection functions, including acetylene leakage alarm and automatic shutdown system
Flameless (graphite furnace) analysis method
Detection limit (Cd) ≤ 4pg

4. Flame analysis method and measurement method

Air acetylene flame method, hydride generator atomic absorption method
The concentration calculation method automatically fits the working curve, automatically corrects sensitivity, and calculates concentration and content.
Repeat measurements 1 to 99 times, automatically calculate the mean, content, standard deviation, and relative standard deviation.
Print test data or final analysis report as a result. The results can be exported as an Excel worksheet.
Software environment: Windows XP/Vista operating system, professional Chinese software

2、 Parameters

Power supply AC 220V/50HZ
Power 150VA
Net weight of the instrument 55kg
Instrument gross weight 80kg
Instrument volume 1110mm (horizontal) x 400mm (depth) x 500mm (height)
Packaging volume 1350mm (horizontal) x 600mm (depth) x 850mm (height)
Working environment temperature: 10-35 ℃
Working environment humidity ≤ 80%

3、 Standard configuration
1. Host
2. Low noise oil-free air compressor
3. Three hollow cathode lamps
4. Operating software

4、 Design Features

1. Total reflection optical system with chromatic aberration reduction across the entire wavelength range. After adjusting the focal point, any wavelength can be changed, and the focal point will no longer change. The wavelength will be automatically scanned and peak searched.

2. It has a deuterium lamp buckle background and a self-priming buckle background.

3. The uniquely designed all titanium burner ensures smooth combustion and fast thermal equilibrium speed.

4. Automatically adjust negative high voltage, lamp current, and element lamp position to maximize energy, and provide automatic gas leakage and flameout protection. 3 hollow cathode lamp stands. Automatic control system, capable of automatically scanning wavelengths. Preheat one element lamp and preheat the other two element lamps.

5. Graphite furnace heating: Users can freely set the heating curve according to their needs.

Sensitivity and detection limit of commonly tested elements in the feed industry