Comp. No.

Exhaustion (%)

pH 3

pH 4

pH 5

pH 6

pH 7

8

80.0

77.0

66.5

41

33.5

9

91.5

88.5

79.5

66

60.0

10

82.0

79.0

68.5

43

35.0

11

75.5

74.0

60.0

37

30.0