112 
Table 34 continued: Total PCA concentrations obtained by EI-MS/MS as well as sPCAs and mPCAs levels determined by CH4/CH2C12-NICI in sediments 
from the North Sea. This method covers C13-10-compounds, while conventional ECNI detects C15-10 PCA. Concentrations determined by ECNI are given in 
brackets for some samples to demonstrate that generally lower levels are found with this method. 
Sample site 
Total PCA a 
[ng/g dw] 
Total PCA a 
[ng/g TOC] 
sPCAs a 
EC 10 -C 13 
mPCAs b mPCAs 
ec 14 -c 15 ec 14 -c 16 
[ng/g dw] 
s+mPCAs 
ECnrCis 
North Sea 
KS 8 (2002) 
14 
4.1 
C 
C 
c 
c 
KS 8 (2003) 
145 
18.2 
30 (27) 
70 (87) 
76 
100(114) 
KS 8 (2004) 
267 
22.2 
62 (43) 
145 (48) 
149 
207 (91) 
KS 11 (2002) 
112 
6.7 
72 
132 
b 
204 
KS 11 (2003) 
98 
8.9 
18 (13) 
54 (34) 
58 
72 (47) 
KS 11 (2004) 
355 
14.2 
79 (63) 
250 (149) 
275 
329 (212) 
BL 2 
27 
4.8 
c 
c 
c 
c 
BL 4 
8 
3.7 
c 
c 
c 
c 
UE 18 
5 
5.2 
c 
c 
c 
c 
UE 28 
9 
9.1 
c 
c 
c 
c 
ES 1 
20 
33.1 
c 
c 
c 
c 
TI 13 
15 
21.4 
c 
c 
c 
c 
UE 15 
27 
11.5 
c 
c 
c 
c 
SSL 
63 
2.3 
c 
c 
c 
c 
UE 20 
25 
6.9 
c 
c 
c 
c 
L 1 
16 
12.3 
c 
c 
c 
c 
a Quantification with sPCA standard of 55.5 % Cl; b Quantification with mPCA standard of 57 % Cl; c Ci 6 not determinable; 
c Concentration <50 ng/g dw, too low for group specific quantification.