Under the optimum conditions, a Beer’s law plot
was constructed at 710 nm and a linear relationship between
absorbance and analyte concentration was obtained
up to 5.5mgml−1 ascorbic acid least square
analysis: A710 D 0:10C C 0:006 (n D 8), where A710
is the absorbance at 710 nm and C is the concentration
of ascorbic acid in mgml−1.