(1) sum of the impurities D and H: not more than 2.5 times the area of the principal peak in the chromatogram obtained with rference solution (a)(0.5%)
(2)unspecified impurities:for each impurty,not more than 0.5times the area of the principal peak in the chromatogram obtained with reference solution(a)(0.1%)
(3)total:not more than 5times the area of the principal peak in the chromatogram obtained with reference solution(a)(1.0%)