Lot

Quantification by spectrophotometry

Quantification by alkalimetry

Absorbance

Content ± SDS (%)

Volume consumed (ml)

Content (%)

1

2

3

0.67

101.8 ± 1.2

11.4

106.6

4

0.81

123.3 ± 1.1

13.4

124.5

5

0.61

92.7 ± 0.2

11.4

105.9

6

0.78

108.5 ± 1.2

10.5

97.9

7

0.62

94.2 ± 0.3

10.2

103.5

8

0.61

92.3 ± 4.6

11.1

95.2

9

10

0.56

84.7 ± 0.5

8.5

78.8

11

0.64

96.7 ± 1.0

11

102.2

12

0.71

107.8 ± 1.8

10.5

97.9

13

0.6

91.3 ± 0.7

10.6

98.9

14

0.6

91.4 ± 0.5

10.8

100.3

15

0.68

103.09 ± 0.7

10

93.3

16

0.66

99.7 ± 2.0

10.4

97.05

17

0.67

101.6 ± 4.6

10.1

94.2

18

0.63

96.3 ± 7.3

10.1

93.8

19

20

0.7

106.2 ± 0.1

10.8

100.2

Reference

0.66

100 ± 0.1

10.95

102.17 ± 0.7