Concentrations and Sources of Polycyclic Aromatic Hydrocarbons in the Seawater around Langkawi Island, Malaysia

Table 5

Diagnostic PAH ratios in seawater and their possible sources.

Station	BaA/BaA + Chr^a	Phe/Ant^b	LMW/HMW^c
Kuah Jetty	0.57	0.87	2.5
Kilim Jetty	0.31	0.62	0.32
Telaga Harbour	1.0	NC^d	2.3
Porto Malai Jetty	0.55	0.80	2.1
Fish F. I	0.70	NC^d	0.21
Fish F. II	0.50	1.8	0.19
Fish F. III	0.55	NC^d	1.2
Mean	0.60	1.1	1.3
Petrogenic sources	<0.20	>15	>1
Pyrogenic sources	>0.35	<10	<1

abenzo[a]anthracene to benzo[a]anthracene plus chrysene ratio. ^bphenanthrene to anthracene ratio; ^clower-molecular-weight PAHs to high-molecular-weight PAHs ratio; ^dnot calculated due to the concentration of one of ratio variables being undetectable.