Exploration of Foods and Foodomics

Table 2

Analytical parameters of the calibration curve of nitrite on MWCNTs/Pt using the SWV method

Analytical parameters	0.1 M PBS (pH = 7)
Peak potential, V	0.67
Linearity range, µM	1.0–1,000
Slope, µA/µM	0.028
Intercept, µA	–0.219
Correlation coefficient	0.995
SE of slope	0.0006
SE of intercept	0.001
LOD, µM	0.10
LOQ, µM	0.35
Within-day of peak current (RSD %)^a	0.32
Within-day of peak potential (RSD %)^a	0.02
Between-day of peak current (RSD %)^a	1.89
Between-day of peak potential (RSD %)^a	0.10

^a Obtained from five measurements. PBS: phosphate-buffered solution; SE: standard error; LOD: limit of detection; RSD: relative standard deviation