Analyte* M* Slope Intercept R2 ΔEa (Expt) ΔEa (Theoretical, eV)**
LC 1A LC 1B LC 1C
(a) FAAS experiment
MgI Ca 6.34×10-4     -1.5168 0 -0.721 -5.335
MgI Sr 4.84×10-4     -1.6924 0 -1.952 -7.422
(a) FAES experiment
Mg(I) K 4.43×10-5 1.14648 0.851 -2.223 0 -3.306 -7.646
K(I) Na 2.91×10-5 1.21180 0.798 -2.316 0 +0.798 -4.341
(b) ICP-AES: Atom line: ne = nMII
CaI Li 2.50×10-4     -6.62 0 -.0721 -5.335
(c) ICP-AES: Ion line: ne = nMIII
CaII Li 1.83     -9.83 0 -6.478 -11.09
MgII Li 1.51     -13.52 0 -9.641 -14.26
Mg(II) Li 1.32×10-5 1.01889 0.992 -8.713 0 -9.644 -14.260
Mg(II) K 1.51×10-5 1.00707 0.990 -8.609 0 -10.695 -14.260
Sr(II) Li 1.15×10-5 1.04741 0.979 -8.820 0 -5.638 -10.254
Sr(II) K 1.28×10-5 1.02957 0.913 -8.737 0 -6.690 -10.254
Ca(II) Li 4.25×10-6 0.95376 0.876 -9.592 0 -7.531 -11.096
*Ionization potentials (eV): Mg1=7.64624, MgII=15.03528, SrII=11.03013, CaI= 6.11316, CaII=11.87172, LiI=5.39172, KI=4.34066, NaI=5.13908 [65], **LC= limiting case (see text): LC 1A=LTE, LC 1B=Pre-LTE, LC 1C=Pre-LTE(analyte)/ LTE(Interferent), CL = confidence level [59,60].
Table 4: Experimental and theoretical ΔEa values for various analyte/interferent systems in the ICP as well as air-acetylene flame plasma.
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