to validate the analytical method i

to validate the analytical method in terms of linearity, precision,
limit of detection and limit of quantification. The precision was
expressed as the coefficient of variation (%CV) of 10 injections of
the standard at 5 mg L

1. The detection limit was calculated as
the concentration that led to a signal three times the noise level
whereas the quantification limit was calculated as ten times the
noise level. Characteristics concerning the validation terms are presented
in Table I below.