Table 3 Initial burst (IB, after 5 min) and residual amount (RA, after 1200 min) values for various PEC samples

ZOL/CS/PEI-1.3 K-0.9-1:5

72 ± 5

9 ± 5

ZOL/CS/PEI-1.3 K-1.1-1:5

75 ± 5

0 ± 5

ZOL/CS/PEI-25 K-0.9-1:5

54 ± 5

0 ± 5

ZOL/CS/PEI-25 K-1.1-1:5

27 ± 5

8 ± 5

ZOL/CS/PEI-750 K-0.9-1:5

39 ± 5

10 ± 5

ZOL/CS/PEI-750 K-1.1-1:5

37 ± 5

27 ± 5

ZOL/CS/PEI-M-25 K-0.9-1:5

57 + 5

6 + 5

ZOL/CS/PEI-M-25 K-1.1-1:5

21 + 5

12 + 5