Table 1.
Percentage of boats with mean and median values (6–8 measurements) of tin on plastic boat hulls
| Country and No. of sites | Mean values of tin | Median values of tin | ||||||
|---|---|---|---|---|---|---|---|---|
| < 50 μg Sn/cm2 St dev in brackets |
> 100 μg Sn/cm2 St dev in brackets |
> 400 μg Sn/cm2 St dev in brackets |
> 800 μg Sn/cm2 St dev in brackets |
< 50 μg Sn/cm2 St dev in brackets |
> 100 μg Sn/cm2 St dev in brackets |
> 400 μg Sn/cm2 St dev in brackets |
> 800 μg Sn/cm2 St dev in brackets |
|
| Denmark 1 (n = 25) | 56 | 24 | 8 | 0 | 64 | 16 | 8 | 0 |
| Denmark 2 (n = 28) | 57 | 21 | 11 | 0 | 61 | 21 | 7 | 0 |
| Denmark 3 (n = 28) | 61 | 29 | 11 | 3.6 | 61 | 25 | 11 | 3.6 |
| Mean DK (n = 3) | 58 (2.5) | 25 (4) | 10 (1.6) | 1.2 (2.1) | 62 (2) | 21 (4.5) | 8.7 (2.1) | 1.2 (2.1) |
| Finland 1 (n = 52) | 81 | 13 | 8 | 0 | 85 | 12 | 8 | 0 |
| Finland 2 (n = 53) | 74 | 11 | 4 | 0 | 76 | 11 | 6 | 0 |
| Finland 3 (n = 51) | 73 | 16 | 4 | 2 | 73 | 14 | 4 | 2 |
| Mean FI (n = 3) | 76 (4.5) | 13 (2.5) | 5 (2.3) | 0.7 (1.2) | 78 (6.2) | 12 (1.5) | 6 (2) | 0.7 (1.2) |
| Germany 1 (n = 50) | 70 | 16 | 2 | 0 | 74 | 12 | 2 | 0 |
| Germany 2 (n = 90) | 84 | 2 | 0 | 0 | 89 | 1 | 0 | 0 |
| Mean DE (n = 2) | 77 (10) | 9 (9.9) | 1 (1.4) | 0 (0) | 82 (11) | 6.5 (7.8) | 1 (1.4) | 0 (0) |
| SE, freshwater (n = 202) | 65 | 26 | 10 | 4 | 65 | 26 | 10 | 4 |
| SE, brackish water (n = 268) | 76 | 16 | 6 | 3 | 76 | 16 | 6 | 3 |
| SE, marine water (n = 202) | 48 | 29 | 16 | 7 | 48 | 29 | 16 | 7 |
| Mean Sweden (n = 3) | 63 (14) | 24 (6.5) | 11 (5.0) | 5 (2.4) | 63 (14) | 24 (6.5) | 11 (5.0) | 5 (2.4) |
Data for Sweden are from Ytreberg et al. 2016 and based on a single measurement per boat
LOQ = 50 μg Sn/cm2
The mean values are presented in italic with the standard deviation in brackets