Abstract
Detection limits in nonrandom (flicker) noise dominated signals are directly proportional to the noise level in the signals. However, the nonrandom noise may be removed by a mathematical technique that requires dedicating several channels to monitoring background fluctuations. The applicability of the correction method to atomic emission spectra generated by an inductively coupled plasma (ICP) is tested for the determination of the detection limits of 20 analytes dissolved in uranyl nitrate solutions. A direct-reading spectrometer commonly used for routine multielement atomic emission analysis was employed. Up to 20-fold improvement in detection limit was achieved. Statistical measures were used to determine which analytical channel can be compensated for and also to determine whether a satisfactory correction could be achieved during the analytical run. 1O3 references, 9 tables.
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