ASYMPTOTICALLY MAXIMIN OBSERVATION OF TRACES OF CHEMICAL-ELEMENTS FROM ANALYTICAL SIGNALS OF INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY

We have obtained a quasioptimal (with respect to the maximin criterion ), background-invariant rule for observation of analytical signals fro m traces of chemical elements using atomic emission spectrometry data. We introduce a dimensionless analytical parameter, and use its depend ence on the concentration of the chemical element in the analyte objec t for determination of lanthanum in aqueous solutions on an inductivel y coupled plasma atomic emission spectrometer. We present estimates of the accuracy of the determination.