Graphite furnace atomic absorption spectrometer

Graphite furnace atomic absorption spectrometer

Technical Specifications

Graphite furnace atomic absorption spectrometerIt is a high-performance and highly reliable spectral analysis instrument, which is controlled and processed by a computer through a USB 3.0 standard interface.

Performance Characteristics

Performance characteristics of the whole machine

1. Integrated total reflection achromatic optical system. ★

The use of concave mirrors instead of convex lenses as optical focusing devices effectively solves the problem of chromatic aberration caused by different focal points of different elements and improves the efficiency of the optical system.

2. C-T type monochromator.

Adopting a 1800 line/mm grating splitting system with a dazzling wavelength of 230nm.

3. Eight element lighthouse. ★

Working with one lamp, up to seven lamps can be preheated, saving time for lamp replacement and preheating, making element measurement faster and more convenient.

4. Fully automated design. ★

Except for the power switch of the host, all functions of the instrument are monitored and controlled by a computer.

5. USB 3.0 communication method. ★

The early adoption of USB 3.0 communication interface in the industry has improved communication speed and is compatible with new computer systems.

6. Background correction system.

Equipped with two background correction modes, deuterium lamp and self absorption, with a background signal of 1A, it has a background correction ability of more than 30 times.

7. The appearance adopts streamlined sheet metal process design, simple and fashionable, beautiful and generous

8. An analysis software with independent intellectual property rights, complete functions, and powerful performance.

The user-friendly interface makes your operation easy. It can switch between Chinese and English Windows style software interfaces and run on operating systems such as Windows XP and Windows 7. It automatically performs qualitative and quantitative analysis, calculates element content, and generates test reports.

Graphite furnace system

1. Integrated design. ★

The graphite furnace power supply and atomic absorption host are located in one instrument, which shortens the cable length, reduces the electromagnetic interference of the graphite furnace power supply to the outside world, and improves the heating efficiency of the graphite tube.

2. Graphite furnace has high temperature control accuracy and fast heating speed.

By using high-power transformers, micro resistor cables, and light controlled heating methods, combined with software and hardware temperature correction systems, the temperature control accuracy in the high temperature section can reach ± 1%.

3. More security measures are taken to make sample analysis safer and more reliable. ★

1) Cooling water flow monitoring

2) Monitoring of carrier gas pressure

3) Graphite tube temperature monitoring

4) Graphite furnace temperature monitoring

4. Automatic carrier gas flow control.

The internal and external gases of the graphite furnace are all automatically controlled by the computer according to the software heating process.

5. 150 position rotary graphite furnace automatic sampler.

The polar coordinate rotary table graphite furnace automatic sampler has high positioning accuracy, stable and reliable operation, and easy use and maintenance.

technical indicators

Wavelength range: 190nm~900nm Automatic peak searching setting

Monochromator type: Czerny Turner type
Spectral bandwidth: 0.1/0.2/0.4/0.7/1.4 nm with five automatic switching modes

Grating flicker wavelength: 230nm

Grating engraving line: 1800 lines/mm

Wavelength accuracy: ≤± 0.25nm
Wavelength repeatability:<0.05nm

Resolution: better than 0.3nm

Static baseline stability: 0.003 Abs (static)

Deuterium lamp background correction capability: over 60 times

Graphite furnace temperature control range: room temperature -3000 ℃

Graphite furnace heating rate: 3000 ℃/s

Precision of graphite furnace cadmium (Cd) measurement: ≤ 2%

Graphite furnace cadmium (Cd) characteristic quantity: ≤ 0.5pg

Graphite furnace detection limit for cadmium (Cd): ≤ 2pg

Power supply: 220V ± 22V, 50Hz ± 1Hz, 5kW (peak)