2.1.1 prepare a stock solution of gallic acid slurry concentration 10 mg/mL, 10 mL volume by weighing the gallic acid 100 mg dissolved in distilled water and adjust the volume to 10 mL with distilled water.
2.1.1 solution prepared stock solution of gallic acid concentration 10 mg / mL 10 mL volume by weight gallic acid 100 mg dissolved in distilled water. And adjust the volume The water was 10 mL
2.1.1 prepared stock solution of solution gallic acid concentrated 10 mg / mL volume 10 mL by weighing gallic acid 100 mg dissolved in distilled water. And adjust the volume with distilled water is 10 mL.