Solutions of sodium phosphate monobasic (84486-300, Anachemia, Canada) and D-glucose (G8270-1KG, Sigma-Aldrich, Canada) were used as a test analytes. An amount of 2.84 g of sodium phosphate dibasic (Na2HPO4) and 36.07 g of D-glucose were dissolved in same volume deionized water (200 mL, DI water), and the resulting concentration were 0.10 M and 1.00 M, respectively. Different solutions were obtained by serial dilution using DI water.