Page 9 - Shimadzu AA-7000

High-Performance Autosampler
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.

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.

High-Sensitivity Application Data (Analysis of Selenium (Se))

Independent control of the gas flow through the graphite tube during
atomization achieves extremely high-sensitivity measurements.
(Japanese Patent 2067563)

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)

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.
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.

Selecting the Graphite Tube

High-density graphite tube Pyro-coated graphite tube Platform tube
(P/N 206-50587) (P/N 206-50588) (P/N 206-50887-02)
Can be used for all elements. Especially Effective for elements that readily form Restricts chemical interference due to
effective for low-boiling point elements carbides (Ni, Fe, Cu, Ca, Ti, Si, V, Mo, etc.). coexisting substances. Effective for the
(Cd, Pb, Na, K, Zn, Mg, etc.). analysis of environmental samples and
biosamples, such as sea water and
industrial waste.
* Depending on the state of the sample, some other combinations may be appropriate.

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