Page 11 - Shimadzu PDA-7000

Principle of Optical Emission Spectrometry Applications of Optical Emission Spectrometry

In optical emission spectrometry, electrical energy is values for several tens of elements within one minute of The Optical Emission Spectrometer covers a wide analysis components.
imparted to a metal sample and the vaporized atoms are starting analysis. range from trace levels to high concentrations of metals – It is used for process-control analysis and for raw materials
excited to obtain emission spectra unique to the elements. Shimadzu optical emission spectrometers use a unique including steel, aluminum, magnesium, copper, zinc, lead, delivery and product dispatch inspections in the metals
These emission spectra are separated by a monochromator process to obtain analysis results in just over ten seconds tin, titanium, nickel, and cobalt – in ingots or alloy refining and processing industries.
and a detector (photomultiplier tube) detects the presence after starting analysis. Optical emission spectrometers using
and intensity of each for quantification and qualification of photoelectric photometry are prescribed in the Japan Ferrous Applications
the elements contained in the sample. This analysis method Industry Standards (JIS) and are adopted for a wide range of
requires no complex pretreatment and obtains quantitative official analyses. Steel
- Quality control by rapid in-furnace analysis
at each stage of manufacture
- Analysis for product standards evaluation
- Materials deliver inspections

Cast Iron
Sample
- Quality control by rapid in-furnace analysis
Sample preparation Analyzed sample surface Discharge spot at each stage of manufacture
(cutting, grinding)
- Analysis for product standards evaluation
Diffraction Monochromator - Materials deliver inspections
Unknown sample intensity Non-ferrous Applications
grating
Electrode

Content
Al 0.1 0.2 0.3 0.4 0.5 % Aluminum Ingot and Rolling Industries
Spectral Lines Display Al - Quality control by rapid in-furnace analysis
PMT
at each stage of manufacture
- Analysis for product standards evaluation
Si - Materials deliver inspections
PMT
N Other Metals
- Quality control by rapid in-furnace analysis
PMT
at each stage of manufacture
Configuration - Analysis for product standards evaluation
other - Materials deliver inspections
The PDA-7000 comprises the following parts:
Excitation unit The spark stand generates sparks between the sample and the counter electrode. Emission spectra of
the elements in the sample are introduced into the monochromator unit. Machinery, Automobile, and
Monochromator unit Splits the light into emission spectral lines. A sensor converts this light into electric currents. Ship-building Applications
Readout unit Measures the generated photocurrents.
Data processing unit Analyzes and processes the measured data.
- Analysis for product standards evaluation
Monochromator unit - Materials deliver inspections
Printer Concave diffraction Monochromator unit Spark stand
Data processing unit grating Entrance slit CRT/printer
Spark stand
Exit slit Data processing unit
PDA-7000 Excitation
unit Interface
Rotary oil pump Photomultiplier
Attenuator
Integrator A/D converter
Evacuation unit Readout unit Excitation unit Readout unit

PDA-7000 Series
10 Optical Emission Spectrometer 11