Accurate and rapid estimation on spectral interferences in routine analysis by ICP-AES: use of mutual interference coefficients |
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Authors: | Y?etsu Danzaki Kunio Takada Kazuaki Wagatsuma and Masaoki Oku |
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Institution: | (1) Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba, Sendai 980-8577, Japan, JP |
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Abstract: | A practical method to estimate spectral interferences and to select optimum analytical lines in ICP-AES is suggested. Depending
on the matrix composition and the amounts of the analyte, the analytical lines suffering from little interferences and the
limit of determination can be determined from calculation using spectral interference coefficients. For this calculation,
the spectral interference coefficients, which are defined as apparent mass of the analyte equivalent to the spectral interference
from unit mass of the interferent, are obtained experimentally for 639 emission lines of 68 elements. There is a good correlation
between the coefficients obtained on two spectrometers having different resolutions.
Received: 24 June 1997 / Revised: 4 December 1997 / Accepted: 24 January 1998 |
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