All calibration standards were prepared from 1000 lgmL1
stock solutions of nitrate and nitrite and the linear calibration
curves were ascertained with six points in each. The calibration
equations of the measured peak areas (V s) versus analyte concentrations
(lgmL1) were utilized to determine the nitrate and
nitrite content of the baby food matrices in lgmL1 which is ultimately
stated as mg kg1. Fig. 2 shows typical FIA signals, i.e., peak
profiles for the nitrate calibration standards in the range of
0.0–20.0 lg mL1