Atomic Absorption Spectrophotometer

AAS-7000 Series Atomic Absorption Spectrophotometer

APPLICATION

The AAS-7000 series atomic absorption spectrophotometer is widely used in various fields like gold, petrochemical, geology, medical, environmental protection, scientific research, agriculture, disease control, food, materials science, commodity inspection and so on. At present, the instruments can analysis more than 70 kinds of elements. It plays a very important role in trace elements’ analysis.

FEATURES

Advanced optical system
The suspension design of optical system, vibrate and change of environment temperature won’t affect its stability.
It takes the lead in adopting 1800/mm diffraction grating, sufficient energy, and high resolution.
The single short light optical system can have a sufficient power to get a lower detection limit to arsenic, selenium.
The well-designed tungsten lamp and self-absorption background technology can ensure a more accurate calibration result.

The integrated design
The careful integrated design, install the flame atomizer, graphite oven and power inside a host, achieve a miniaturization instrument. (Patent number: ZL200620023298.9).
The optimized power technology extends lamp’s service life.

Automatic quickly switch
Convenient switchable workbench can switch flame, graphite oven automatically or manual operation automatically and quickly.
Optimized power technology to extend the life of the lamp.

Reliable safety protection system
The Safe and reliable control alarm device ensure which can ensure hollow cathode lamp current protection.
Gas / under-voltage to protect air, gas leakage alarm, overheat graphite furnace and flame under abnormal protection.

Excellent scalability
It can support HG-01-type ceramic heater hydride sound device, to achieve the ultra-accurate analysis of Pb, Se, Hg, Bi, Sb, Sn.
It can also be equipped with graphite furnace auto sampler, automatic configure with standard solution, and achieve fully automatic analysis.
Then can optional with flame atomic absorption auto sampler, system of nitrous oxide and acetylene gas, and analysis more than 30 kinds of high-temperature elements.

High automation
It can automatic wavelength positioning, automatic slit switching, lamp current, automatic gain setting which indicators can all reach international advanced level.
Six lamps turret rotation units are fully automatically controlled by computer, rapid positioning, automatically select elements lamp.
Truly achieve automatically and a uto-order analysis more than six elements.
Characterized with automatic ignition, automatic gas flow control, and leak alarm.

AAS-7000 Series Summary

Model	Configuration	Type
AAS-7003	Hose, flame, graphite furnace	Automatic

Atomic absorption spectrophotometer configuration:

Host: optional model;
Computer, printer, specialized software and anti-control interface;
Air: air compressor; high purity argon, acetylene gas (self);
Elements lamp: (according to user need to select);
Hydride generator (optional);
Graphite furnace auto sampler (optional);
Graphite furnace cooling water tank (optional);
Spare parts and special tools;

The superior Graphite Furnace System

Mature and advanced way of vertical temperature

Graphite furnace atomic transition temperature can reach 3000 ℃, in line with national standards for nickel, molybdenum, vanadium, cobalt and other elements of high-temperature graphite furnace atomic temperature requirements.

High Stability

The advanced optical systems ensure the instrument's high optical power, when detect with graphite furnace, the negative pressure lower about 100 ~ 200V than other domestic products under the same conditions (each element can reach this level), high signal to noise ratio ensure a stable data.

Maximum sample volume significantly increased

The specially designed graphite furnace increases the maximum injection volume to70 μL, which is conducive to multiple injections and low concentration samples.

High background correction capability

Equipped with continuous light (D2), self-absorption background correction system, which can correct up to 1.5A of background interference.

High-temperature heating rate

The heating rate is greatly increased due to the use of optical heating rate, fast atoms, improve analytical sensitivity and accuracy.

Uniform heating temperature and high-precision

The unique graphite furnace design ensures atomic effects of the isothermal time, for obtain accurate data to provide a guarantee.

A pioneering all-titanium spray combustion system

Uses high-tech aerospace, lost wax casting process titanium spray chamber and burner head. Has excellent resistance to corrosion, oxidation, aging, and high temperature, long service life;

Humanity design of sample inlet

The design of sample inlet reduces the sample error, which make sample injection easier, and ensure that even a manual injection can achieve good accuracy.

Advanced design of graphite furnace graphite

Graphite cone can be easily replaced after wearing down, to ensure the stability of the electrode conductivity, greatly improving the efficiency of instrumental analysis.

Highly automated data processing workstation

Friendly interface:

Based on Windows XP platform, multi-language support, such as English, Korean, etc., can quickly and easily draw analysis. Powerful analysis capabilities and fault-tolerant samples, flexibility to modify the curve fitting equation

Report printing:

Flexible report printing, users can print according to the different choice.

Data management

To achieve the management of history and related follow-up treatment, including query, editing and other functions. Can download a variety of file formats and data files.

QA / QC control system

Automatically determine whether the result of the analysis is appropriate, if out of range, the system automatically re-measured in accordance with set requirements. About the system's QA / QC features include: standard deviation (SD) test, the relative standard deviation (RSD) detection, correlation coefficient testing, QC testing, baseline drift (sensitivity correction) test, the sample detection limit (automatic on-line dilution).

Instrument control functions

Automatic element lamps selecting, automatic wavelength scanning, automatic slit switching, lamp current automatically set, etc.

Condition Monitoring

Real-time dynamic monitor equipment working status of each component. Flame: to monitor the combustion head type (normal or high-temperature combustion head), to monitor water seal level, gas, the auxiliary gas switch, pressure, auxiliary gas current, acetylene gas leakage alarm. Graphite furnace: over-current protection, monitoring water temperature, water flow, gas pressure monitoring and protection.

Lighting time management

automatically record the time of element light.

Technical parameters

Optical system

Wavelength range	190 ~ 900nm
Monochromator	C-T grating monochromator
Wavelength repeatability	≤0.1nm (AAS-7002, AAS-7003) ≤0.2nm (AAS-7000, AAS-7001)
blaze wavelength	250nm
Resolution	better than 0.3nm
Spectral Bandwidth	0.1, 0.2, 0.4, 1.0, 2.0 nm five-speed auto switching (AAS-7002, AAS-7003)
Wavelength accuracy	± 0.2nm
Grating grooves	1800 / mm
Baseline stability	≤ ± 0.004A/30min (dynamic), ≤ ± 0.002A/30min (static)

Flame analysis

Cu characteristic concentration	≤ 0.02 μg / ml
Precision RSD	≤ 1%
Position adjustment	Best regulation for height and angle, replace Flame / hydride in 1min.
Detection limit	≤ 0.005 μg / ml
Combustion head	50* 100mm interchangeable all-titanium burner head, all-titanium spray chamber

Graphite furnace analysis

Cd features volume	0.5×10－12g
Temperature range	room temperature~3000 ℃
Temperature program	Temperature program up to 20 bands, ladder, ramp, Maintain the three kinds of heating methods.
Heating modes	maximum power heating and light-controlled rapid heating
Detection limit	0.5×10－12g
Precision RSD	≤ 2%
Ramp rate	≥ 2000 ℃ / sec.

Background correction

Flame and graphite furnace background correction can be all achieved.

Correction methods: deuterium lamp, self-absorption background correction (optional)

Correction capability: 1.5A background correction can be corrected, correction capability> 50-fold.

Data Processing

Measuring method: flame absorption, flame emission method, graphite furnace, hydride method.

Analysis: linear equations, nonlinear equations, the standard addition method. Print output: the calibration curve, the signal spectrum, instrument conditions, analysis parameters and results can be automatically stored and printed.

Graphite furnace power supply built-in integration host

Size: 880 (L) × 540 (width) × 450 (high) mm, 125kg.

Power supply: 220V, 50Hz, single-phase

Host: 200W, graphite furnace 4KW

Main Features

Suspended advanced optical system design: the entire optical system installed in the semi-hanging floating optical base, which has good anti-seismic, anti-drift, strong light energy, and high stability.
Gas automatic protection system: safety interlock protection and anti-tempering device; acetylene leak, air voltage, alarm and automatic power off and breathe under abnormal condition. Automatic switch 6 lamp turret, completely automatically controlled by a computer, rapid positioning, automatically select lights elements. Wavelength automatic positioning, slit switching and lamp current, gain automatically set, full band scan completed positioning within 45s.
Spectral Bandwidth: 0.1, 0.2, 0.4, 1.0, 2.0 nm five-speed optional. With a flame emission measurement function, provide a variety of measurement method to potassium, sodium, lithium and other alkali metal. Efficient glass atomizer, atomization efficiency up to 38%, 5mg / L Cu solution absorbed luminosity can reach to 0.95A. All-titanium atomization firing system, anti-corrosion, oxidation, high temperature, long service life, perfect matching of nitrous oxide / acetylene system, increase more than 30 kinds of high-temperature detection element analysis
Well-integrated design: the flame atomizer, graphite furnace and graphite furnace power supply are all installed in one host, to achieve the miniaturization of the instrument.
Excellent graphite furnace power supply design: graphite furnace atomic maximum power does not exceed 4KV, bring small disturbance.
Advanced table design: two seconds to switch flame / graphite furnace, no need to adjust the optical path