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                  ICP-OES

Method information

The ICP-OES aspirates a liquid sample into a plasma and the optics measure the light emitted on user-defined wavelengths.  The Genesis uses an internal self-calibration procedure to ensure good wavelength intensity recognition.  Customized methods can be developed for specific elements and for specific matrices.  Typical methods use a 4-point calibration standards of single or multiple elements (or a combination of both to allow detection and correction of interferences).

Instrument description:

  • Spectro Genesis ICP-OES, side-on plasma optics, SmartAnalyzer software
  • Nebulizers: crossflow, modified Lichte nebulizer (currently in trials)
  • uses argon gas to purge the system

Sample type: elements in liquid samples (water or acid-digested solids including animal tissue, soil, plants, coatings, etc.)

Elements: Ag, Al, As, B, Ba, Be, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sb, Se, SiO2, Sn, Sr, Ti, Tl, V, Zn, Zr

Detection limits:

  • instrument detection limits are moderately low (generally mg to µg L-1)
  • depends upon the sample and varies per element
  • depends upon the nebulizer used (modified Lichte gets lower detection limits for some elements, but it is sensitive to salts)
  • Available soon: list of typical instrument detection limits (crossflow nebulizer) 

Matrix interferences: Some elements are subject to significant interferences during analysis and may be more difficult to determine depending on the sample matrix (including, but not limited to Ag, Se, Tl). 

Sample requirements:

  • inorganic samples and matrices
  • free of particulates that could clog the instrument
  • sample volume 10 ml (5 ml is the absolute minimum and allows for one pass of the ICP)
  • no hydrofluoric acid

 

 

 

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Last Updated: Thursday, May 23, 2013 6:05:04 PM