C122- E05 8G
Atomic Absorption Spectrophotometers
AA-7000 Series
Atomic Absorption Spectrophotometers
AA-7000 Series
Reaching Even Greater Heights
Enhanced Flame Analysis
World-Class High-Sensitivity Furnace
Improved Dual Atomizer System
Advanced Safety Technology
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The AA-7000 Series can be upgraded by adding units to allow the system to handle the analysis targets.
-
System Configuration can Evolve
with Your Needs
AA-7000 Series supports a wide range of
analysis applications.
Major Fields of Application
Analysis Sensitivities
Concentration limit of detection
(ppm) (ppb)
H
Li NeFONCB
ArClSPAl
Ca Sc Ti Cr Mn Fe Co Ni Cu Zn KrBrSeGa
YZrNbMo
Tc Ru Rh Pd Cd XeTe IIn
Cs Ba La
Fr Ra Ac
Hf Ta W Re Os Ir AuPt Hg RnAtPoBiPbTl
Ce Pr Nd Pm Sm Eu Gd Tb LuYbTmErHoDy
Th Pa U Np Pu Am Cm Bk LrNoMdFmEsCf
He
Ag
Sn Sb
Si
V
Be
Na
Rb Sr
Mg
K
Ge As
* May differ according to coexisting substances in the sample.
AA-7000G GFA-7000A
AA-7000G GFA-7000A Auto Sampler System
ASC
*2
Environment
Metals, Semiconductors, Ceramics
Petroleum, Chemicals, Polymers
Seawater, river water, effluent,
sludge, air-borne dust
Metals, minerals, glass,
ceramics, IC chips
Petroleum, oil, catalysts,
chemical products, biodiesel
Blood, animals, plants,
drugs, food products
Medical, Biology, Pharmaceuticals
Flame
Furnace
AA-7000F Manual Burner System
AA-7000F
AA-7000F/AAC
AA-7000F/AAC Auto Burner System
GFA
ASC
*1
ASC
*1
*2
*3
AAC
AAC
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Flame and Measurement Procedures
Flame Selection
Air-C2H2N2O-C2H2HVG MVU
H
Be NeFONCB
Na Mg ArClSPAl
KCa Ti CrMnFeCoNiCuZn KrBrGa
Rb Sr Y Zr Nb Mo
Tc Ru Rh Pd Cd XeITeIn
Cs
Ba La
Fr Ra Ac
Hf Ta W Re Os Ir Pt Au RnAtPoBiPbTl
Ce Pr Nd Pm Sm Eu Gd Tb LuYbTmErHoDy
Th Pa U Np Pu Am Cm Bk LrNoMdFmEsCf
He
Ag
Ge
Si
V
Li
SeAs
Sb
Hg
Sc
Sn
AUTO
Graphite Furnace
Atomizer
GFA
AA-7000F/AAC Dual Atomizer System
Auto Atomizer
Changer
ASC
Autosampler
Dual Atomizer System
Automatic adjustment of atomizer
Automatic serach of burner height
AUTO
AAC
*1 Requires ASC stand kit.
*2 Requires ASK-7000.
*3 Automatic burner height search function can be used.
AA-7000F/AAC equips with AAC as standard.
AA-7000F Flame Model
AA-7000G Furnace Model (with options attached)
Detector
Hollow cathode lamp
Beam splitter
Monochromator
D2 lamp
Chopper mirror
Burner head (or graphite tube)
Reference beam
Sample beam
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Enhanced Flame Analysis
The AA-7000 Series incorporates newly developed 3D double-beam optics.
The optical system has been designed to produce its maximum performance for each measurement method through
optimal adjustment of the light beam and light beam digital filter, and by using optical components that restrict light
losses.
Double-Beam Optics and Stable Hardware Achieve Superior Stability
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Advantages of the Double-Beam System
Support for Developing Analytical Conditions
Optional Autosampler Reduces Analysis Workload
Long-term stability
The graph shows the results of
measurements on 2 ppm copper (Cu)
conducted over at least one hour.
(The plot shows mean values for 11
repeated measurements.) Over the
course of more than 600
measurements, the instrument
achieved a relative standard
deviation within 1%.
High sensitivity
The graph shows the direct
measurement results for 0.1
ppm lead (Pb).
Automatic gas flow rate optimization
Automatic searching for optimal fuel gas flow rate (Japanese Patent 2099886). It is important
to determine the optimal gas flow rate for the flame when using an organic solvent or after
changing the burner height. The AA-7000F Series automatically optimizes the gas flow rate
by measuring the changes in absorbance between a blank and a standard sample. The
difference between the two is displayed on the screen. The gas flow rate achieving the
highest sensitivity is detected and this value is automatically set as the gas flow rate value.
Automatic burner height optimization (AA-7000F/AAC)
The absorption sensitivity for flame analysis is also affected by the burner height. This results
from variations in the flame temperature due to the burner height. The flame temperature is
also affected by the matrix components. AA-7000F/AAC adjusts the burner height in 0.5 mm
steps to automatically search for the optimal conditions.
AA-7000F enables above function by AAC-7000 (option).
Low carryover
Great care must be taken to avoid carryover during flame analysis. The new ASC-7000
autosampler rinses the nozzle at the rinsing port on the overflow mechanism after each
sample measurement is complete. This ensures 10-4 max. carryover during the
measurements of multiple samples. The graph shows the results of consecutive analyses
of 10 ppm, 20 ppm, and 50 ppm sodium (Na) standard solutions in the EMISSION mode.
No carryover could be detected when measuring the 10 ppm standard sample
immediately after the measuring the 50 ppm Na standard sample.
Example of micro sampling analysis
Examples of the measured waveforms (overlaid) and calibration curve for micro
sampling analysis are shown to the right.
A 2-ppm Cu standard solution was prepared by auto-dilution using the autosampler.
The autosampler can also be used to conduct dilution measurements of the sample.
(Injection volume: 90 µL)
Trace Sample Analysis Using Micro Sampling
Micro sampling
At least 1 mL (1000 µL) volume of a liquid sample is required for the continuous intake of
sample during normal flame analysis. With micro sampling, however, approximately 50 to 90
µL of sample is injected in one shot into the flame and quantitation is based on the height
and area of the peak signal obtained. This method offers the advantages below.
Advantages
.
Permits analysis of small sample volumes
.
Multi-element analysis of small sample volumes
.
No blockage of burner slot with samples having a high salt concentration
.
Synchronized with the autosampler for auto-dilution measurements
* Synchronization with the autosampler requires the optional micro sampling kit.
Data Showing Long-Term Stability for
Flame Cu Measurements
0.1 ppm to 0.4 ppm Calibration Curve for Lead (Pb)
A
b
s
Conc(ppm)
Conventional method Overflow method
Discharge
Data showing low carryover
1. Sample injected into
micro sampling port.
2. Solenoid valve opens to inject sample
in one shot into the flame.
Sampling port
Solenoid
valve
(opened)
Solenoid
valve
(closed)
Sampling port
Absorbance
Measurement time
Pb 0.08ppb
Mn 0.02ppb
0.05ppb
0.01ppb
Enhanced Sensitivity due to Graphite Furnace
Advances in optics and a new graphite furnace design achieve improved
lower limits of detection for furnace analysis (comparison with previous
Shimadzu models).
This superb analysis performance is possible in all fields.
Achieves World-Class Lower Limits of Detection
Previous New
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World-Class High-Sensitivity Furnace
High-Performance Autosampler
High-Sensitivity Application Data (Analysis of Selenium (Se))
Mix and inject up to four sample types (diluted solution, standard solution,
sample, matrix modifier, etc.). (Of course, unmixed samples can also be injected.)
Select a fluororesin tube or pipette tip as the injection nozzle.
Automatic dilution and re-analysis if the calibration curve concentration is exceeded.
Independent control of the gas flow through the graphite tube during
atomization achieves extremely high-sensitivity measurements.
(Japanese Patent 2067563)
Digital temperature control and electronic gas flow control enhance stability
Combination of a high-sensitivity optical sensor and unique digital temperature control
technology achieves highly accurate temperature control in all temperature regions from
drying to atomization. An electronic flow controller can precisely control the inner gas
flow rate in 0.01 L/min units. These control techniques significantly enhance both the
sensitivity and the data stability.
Example of Automatic Dilution and Re-Analysis
Analysis of cadmium (Cd): The maximum concentration of the calibration curve has been set to 1ppb. At 1.8ppb, the sample of [003] has exceeded the
maximum concentration. As a resultit has been automatically diluted by 4 times and re-measured.
* Depending on the state of the sample, some other combinations may be appropriate.
High-density graphite tube
(P/N 206-50587)
Pyro-coated graphite tube
(P/N 206-50588)
Platform tube
(P/N 206-50887-02)
Selecting the Graphite Tube
Effective for elements that readily form
carbides (Ni, Fe, Cu, Ca, Ti, Si, V, Mo, etc.).
Restricts chemical interference due to
coexisting substances. Effective for the
analysis of environmental samples and
biosamples, such as sea water and
industrial waste.
Can be used for all elements. Especially
effective for low-boiling point elements
(Cd, Pb, Na, K, Zn, Mg, etc.).
Measurement Example Showing High Sensitivity
Analysis of 0 to 5 ppb selenium (Se): Sensitivity is adequate for 1 ppb measurements.
(20 µL injected volume, Pd modifier, pyro-coated graphite tube)
Measurement Example Showing High Stability
Analysis of 0.5 ppb lead (Pb): Approx. 5% relative standard deviation after 5 repeated
measurements is adequate for quantitative analysis.
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