Possibilities of High Resolution Inductively Coupled Plasma Optical Emission Spectrometry in the Determination of Trace Elements in Environmental Materials

Table 6

Determination of Zn, Cr, Pb, and Cu in soil sample, obtained by ULTIMA 2: mean values [𝑋] for (𝑛=4 replicates) and the confidence interval of the mean value [Δ𝑋] for statistical confidence 𝑃=95% and 𝑓=𝑛−1=3 (column 2); relative standard deviation (RSD %) (column 3). Columns 5 and 6 list the corresponding mean values [Δ𝑋] for statistical confidence 𝑃=95% and 𝑓=𝑛−1=3 (column 5) and RSD, %, obtained by D.C. Arc-OES.

ULTIMA 2, ICP-OES			D.C. Arc-OES
Selected prominent line, wavelength, λ, nm	Concentration, 𝑋±Δ𝑋 (µg g^−1)	RSD, %	Selected prominent line, wavelength, λ, nm	Concentration, 𝑋±Δ𝑋 (µg g^−1)	RSD, %
Zn II 202.548	77.5 ± 1.2	1.6	Zn I 328.233	75 ± 4.2	5.6
Cr II 267.716	54.0 ± 1.0	1.9	Cr II 267.716	55.0 ± 3.0	5.5
Pb II 220.353	22.0 ± 0.5	2.3	Pb I 283.563	22 ± 1.0	4.6
Cu I 324.754	15.0 ± 0.4	2.7	Cu I 324.754	12 ± 0.6	5.0