Page 6 - Shimadzu AA-7800 Series

Any Application

Advanced Basic Performance Supports Wide Variety of Applications Flame Analysis Offers Superior General Applicability

Double-Beam Optical System Analyzes High-Concentration Elements by Changing the Burner Angle
The AA-7800 is equipped with a three-dimensional Elements present in high concentrations can be measured in the flame analysis mode by adjusting the burner angle to decrease
optical system that is automatically set to the optical Detector absorbance. That enables measurement of up to about 20 times higher element concentrations, which helps minimize dilution
double-beam mode for flame measurements. In Monochromator errors and the effects of measurement element contamination from containers or reagents used.
addition, the high-speed digital filter and use of D2 lamp Note: The automatic dual atomizer system, which is a combination of the model with AAC and the GFA-7800, cannot change the burner angle.
optical components with extremely low optical loss Chopper mirror
Reference beam
levels achieve data stability and high sensitivity. Reference beam 1
Sample beam 0.8
0.4 Beam splitter Relative Sensitivity 0.6
Absorbance 0.2 0.4

0.2
0
0:00 1:00
Time (hh:mm) 0
Hollow cathode lamp 0 10 20 30 40 50 60 70 80 90
Results are shown from measuring 2 ppm of copper for over Burner Angle
an hour (average of 11 successive measurements plotted). Burner Angle vs. Relative Sensitivity With Burner Angle Changed Burner Head with
Over the course of hundreds of measurements, the Angle-scale Markings (Optional)
instrument achieved a relative standard deviation within 1%.
High-Sensitivity Analysis Using Atom Booster (Optional)
The atom booster is a 15 cm long quartz tube with a vertical slit cut in the tube. Positioned above the burner head, the tube
Digital Temperature Control and Gas Control Results in High Stability increases the delay time of atoms inside the flame, which increases absorbance by increasing the atomization density.
Atom Booster
Element Sensitivity Increase
The high-sensitivity optical sensor in combination with Shimadzu’s unique 0.25 Without With
temperature control method results in precise temperature control throughout all Cd 0.0015 0.0007 Approx. 2.1 x
0.2
temperature regions for drying to atomization. Pb 0.025 0.012 Approx. 2.3 x
An electronically controlled flow controller enables the inner gas flowrate to 0.15 Comparison of Lower Limit of Detection with or without Atom Booster (Units: mg/L)
be controlled precisely in 0.01 L/min increments.
0.1
That ensures high data stability even for furnace analysis. * This option cannot be used with N2O-C2H2 flame. Contact us for information about the types
0.05
of samples for which this option is available and the elements for which this option is useful.
0 Atom Booster
Furnace Analysis Stability Data for Manganese
(Plot of 50 Repetitions of Compatible with Various Organic Solvents
Averaging 5 Absorbance Measurements)
By replacing standard parts with optional organic solvent-resistant parts, organic solvents that normally cause difficulties if
injected in the standard configuration, such as MIBK or butyl acetate, can be injected.
Automatically Switches Between Eight Hollow Cathode Lamps

The AA-7800 lamp housing includes functionality for automatically switching Support Gas Flow Also Compatible with Flame Emission
between eight hollow cathode lamps installed in a turret and simultaneously Meter Included Standard Spectrophotometry
illuminating any two of the lamps.
In combination with an ASC-7800 autosampler, it can measure multiple Float-type flow meter (rotameter) The AA-7800 can also be used as a flame emission spectro-
elements automatically. included standard for Support gas (N2O). photometer. By using the wavelength shift function to
specify two measurement wavelengths, the background can
be corrected even for flame emission spectrophotometry.

Lamp History Function is Helpful for Lamp Management

In the lamp registration window, cumulative operating times can be calculated for
each lamp, which is helpful for managing the service life of lamps. Multiple lamps
for the same element can be differentiated based on lamp IDs.
[Wavelength Shift] Window

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