The LODs obtained using the 120 mM NaDC with 240 s injection
time method were 5.70 and 7.39 ng/mL for ENRO and CIP,
respectively. Lower LODs were achieved (1.87 and 2.21 ng/mL for
ENRO and CIP, respectively) by using the 80 mM NaDC with
300 s injection time method.