Following filtration through ashless filter papers, 1 mL of filtrate was diluted with 60 mL of acidic water (pH 6.3) and the final pH level was adjusted to 6.3 by diluted hydrochloric acid solution
Following filtration throughashless filter papers, 1 mL of filtrate was diluted with 60 mL ofacidic water (pH 6.3) and the final pH level was adjusted to 6.3by diluted hydrochloric acid solution