Fig. 5

Calibration curve of solid phase spectrophotometric ascorbic acid determination using Ti5HPC20 (see Table 1 for xerogel names). m(Ti5HPC20) = 0.10 g, V = 5.0 mL, pH 4.0, time of contact 20 min
Calibration curve of solid phase spectrophotometric ascorbic acid determination using Ti5HPC20 (see Table 1 for xerogel names). m(Ti5HPC20) = 0.10 g, V = 5.0 mL, pH 4.0, time of contact 20 min