3.6. Precision, accuracy, detection limits and quantification limit
Precision and accuracy were determined as relative standard
deviation (RSD) and relative error (RE), respectively, by analyzing
the same reference standard solution five times for various
concentration levels. Table 2 shows RSD and RE for five
concentration levels of each element. The detection limits DL
of the investigated metals, defined as the metal concentration
yielding an analytical peak equal to the minimum detectable