Accuracy was evaluated by comparing the experimentallyderived
concentrations of analytes in the CRM with the certified
concentrations. Instrumental repeatability was estimated as the
relative standard deviation (RSD) of consecutive QC measurements;
within-run precision as the RSD of QC measurements taken
at regular intervals within an analytical run; and between-run precision
as the RSD of CRM measurements throughout the entire
experiment, which comprised two ICP-MS and five ICP–OES analytical
runs. The limit of detection (LOD) and limit of quantitation
(LOQ) were calculated as three and 10 times the standard deviation
(SD) of 10 blank measurements.
Genotypic variation in essential mineral composition was described
as the RSD across the 32 full-season or 24 ultra-early peanut
genotypes. The distribution (mean, standard deviation, and
quartiles) and range of essential mineral concentrations have also
been presented graphically in Fig. 1