Table 4

Actual concentrations of Tween-80 and non-Tween-80 containing solutions at 0 and 4 months stored at -20°.


Actual Concentration (% predicted)

Tween-80
Non-Tween-80

Predicted Concentration (in μM)
0 Month
4 Months
0 Month
4 Months

32.0
28.54 (89.2)
22.62 (70.7)
21.82 (68.2)
15.87 (49.6)
64.0
56.90 (88.9)
47.81 (74.7)
42.56 (66.5)
30.53 (47.7)
128.0
120.45 (94.1)
104.32 (81.5)
92.67 (72.4)
69.63 (54.4)

Kopec et al. Cough 2008 4:3   doi:10.1186/1745-9974-4-3