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Table 2 Actual Concentrations of Tween-80 and non-Tween-80 containing solutions at 0, 2, and 4 months stored at 4°C and protected from light.

From: The effects of Tween-80 on the integrity of solutions of capsaicin: useful information for performing tussigenic challenges

 

Actual Concentration (% predicted)

 

Tween-80

Non-Tween-80

Predicted Concentration (in μM)

0 month

2 months

4 months

0 month

2 months

4 months

0.5

0.44 (88.4)

0.23 (45.4)

0.24 (47.8)

0.33 (67.4)

0.24 (47.8)

0.27 (53.5)

1.0

0.78 (78.1)

0.59 (58.9)

0.59 (58.6)

0.64 (63.5)

0.55 (54.5)

0.58 (58.2)

2.0

1.49 (74.4)

1.30 (64.9)

1.47 (73.4)

1.24 (62.2)

1.06 (53.0)

1.18 (59.2)

4.0

3.12 (78.0)

2.97 (74.3)

3.32 (83.0)

2.48 (62.0)

2.36 (59.1)

2.49 (62.2)

8.0

6.27 (78.4)

5.94 (74.3)

7.10 (88.8)

4.92 (61.5)

4.37 (54.6)

4.74 (59.3)

16.0

13.74 (85.9)

11.76 (73.5)

12.62 (78.9)

10.37 (63.1)

8.32 (52.0)

8.99 (56.2)

32.0

28.54 (89.2)

26.50 (82.8)

27.30 (85.3)

21.82 (68.2)

21.42 (66.9)

21.37 (66.8)

64.0

56.90 (88.9)

56.19 (87.8)

55.87 (87.3)

42.56 (66.5)

40.32 (63.1)

42.37 (66.2)

128.0

120.45 (94.1)

115.07 (89.9)

119.68 (93.5)

92.67 (72.4)

43.26 (33.8)

52.61 (41.1)