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Signal compensation by the light scattering of sample aerosols in ICP-AES
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2012, v.25 no.4, pp.223-229
https://doi.org/10.5806/AST.2012.25.4.223
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(2012). Signal compensation by the light scattering of sample aerosols in ICP-AES. Analytical Science and Technology, 25(4), 223-229, https://doi.org/10.5806/AST.2012.25.4.223
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Abstract
Analytical signal from ICP was compensated by the light scattering of sample aerosols. Reference scattering signal was generated by a He-Ne or diode laser, monitored for the amount of aerosol producing and used for the compensation of analytical signals. The result showed that significant improvement in precision could be achieved for the short-term signal (within 1 minute) from 3.4% to 0.9% RSD in signal and 14.9%to 4.2% for the long-term (10 minutes) for Be, Pb and Co. This method is very useful not only for the pulse type but for continuous type signals especially when a nebulizer is unstable. To improve long-term precision,higher stability is required in the scattering cell and detector as well as the reduction of noise from the line between a nebulizer and plasma.
- keywords
- ICP, signal compensation, light scattering
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