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Spectro Analytical Introduces High Accuracy Optical Emission Spectroscopy (OES) Technology

SPECTRO Analytical Instruments has introduced optical emission spectrometry (OES) technology that offers greater carbon measurement accuracy and speed in cast iron production applications. The technology debuts at the Cast Expo and Metal Casting Congress, April 6-9, 2013, in St. Louis.

“Our new analytical solution combines the performance of the traditional combustion analyzer with the speed and ease-of-use of OES methodology,“ comments Kay Toedter , SPECTRO Product Manager SMA, “Now incorporated in our SPECTROLAB and SPECTROMAXx systems, this new approach precisely determines carbon in cast iron, even on suboptimal samples, with results comparable to those achieved with the time- and money-consuming combustion analysis technique.”

“A new analytical carbon line and a related reference line, in combination with a modified read-out sequence, enable the detection of free graphite during the pre-burn phase. This in turn ensures accurate carbon results for many more samples than before. Samples with an unacceptably high amount of free graphite are identified as ‘bad” samples’,” notes Kay Toedter.

Better Technology for Superior Performance

SPECTRO’s advanced OES analysis technology excels across the key requirements for superior carbon measurement performance.

  • Digitally controlled plasma generator: For the first time in OES history, the SPECTROMAXx and SPECTROLAB plasma generators are fully digitally controlled for more accurate and reproducible spark definition. This allows the instrument to deliver greater precision, better repeatability, faster measurement with less impact from external interference.
  • Greater UV performance: SPECTROLAB’s unique UV-PLUS system contains a hermetically sealed opti­cal chamber that is filled just once with argon. Impurities are removed through a built-in filter cartridge, reducing operating costs and extending maintenance intervals.
  • Higher optical resolution: The SPECTROMAXx is equipped exclusively with CCD technology for users who don’t need the higher sensitivity and shorter reaction time of photomultiplier detection (PMT). For those requiring ultra trace analysis and time-dependent spark examination, the SPECTROLAB combines both CCD and PMT technologies in a single, powerful instrument.
  • Sophisticated data processing: The SPECTROLAB and SPECTROMAXx systems enable complete coverage of the entire spectrum relevant for cast iron analysis. In addition to outputting results for individual elements, the data can be sorted according to measurement or configuration, or read out as a complete wavelength scan. SPECTROLAB’s PMT signal can be outputted with microsecond resolution, allowing individual sparks to be broken into a hundred or more steps.


The SPECTROLAB and SPECTROMAXx system applications for cast iron carbon analyses are immediately available. For more information, visit SPECTRO at


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