Table 1: Stability of color complex by the proposed method.

Time after color development (min) Absorbance (555 nm) with the following amount of chitosan (μg/mL)
51025

50.0860.1510.410
100.0860.1520.412
150.0910.1530.415
200.0950.1540.411
250.0980.1520.410
300.0980.1520.411
350.1010.1540.412
400.1000.1520.411
450.1000.1540.409
500.1020.1570.409
550.0970.1550.404
600.1000.1570.405
900.0920.1530.402
1200.0920.1530.409
1500.0920.1500.407
1800.0920.1500.414
1080 (18 h)0.0460.0800.231

The values are means of four replicates.