Table 1.

OPAH concentration in surface soil (ng g⁻¹; sampling depth 10 cm) at different locations; ND = not determined; < x = smaller than LOQ but LOQ unknown

Location	Košetice, Czech Republicc	Mokrá, Czech Republicc	North of Manaus, Brazild	Gardsjön, Swedena,e	20 sites in Argentinaf	Eastern Chinab, g	China plateauh	China temperateh	China subtropicalh	China tropicalh
Type of location	Background	Semi-urban	Background	Background	Remote	Agricultural	Rural
Land use	Grassland	Grassland	Forest	Not specified	Grassland/scrubland	Agricultural	Forest, agricultural, river shore, grassland
Number of OPAHs	11	11	7	10	15	4	15	15	15	15
ΣOPAHs	4.1	5.9	6.6	112	0.1–125	9	123	76	147	70
1,4-O2NAP	0.13	0.05	< 1	ND	< x	ND	0.5	0.5	1	0.5
1-(CHO)NAP	0.02	0.02	1.1	ND	< x	ND	0.7	0.8	1.9	0.6
9-OFLN	0.57	0.70	1.7	3.6	< x − 2.8	3.7	4.5	9.4	13.4	5.0
9,10-O2ANT	0.32	0.85	2.1	13	< x − 8.6	7.1	4.8	12.2	26.2	3.6
9,10-O2PHE	< 2.8	< 2.8	ND	ND	ND	ND	ND	ND	ND	ND
11-OBaFLN	0.52	0.94	ND	ND	< x − 5.2	ND	4.3	4.8	7.0	1.1
11-OBbFLN	0.56	0.92	ND	ND	ND	ND	ND	ND	ND	ND
BAN	0.27	0.40	ND	ND	< x − 16	6.1	51	12.6	33.4	17.5
7,12-O2BAA	0.38	0.49	ND	28	< x − 20	2.9	39	9.4	19.6	5.9
5,12-O2NAC	0.21	0.33	ND	ND	< x − 2.4	ND	4.5	3.2	6.2	6.9
6-OBPYR	0.43	0.53	ND	31	< x − 21	ND	9.6	9.1	15.1	12.6
DBF	0.37	0.37	ND	< 3	ND	ND	ND	ND	ND	ND
6-OBCC	0.28	0.29	ND	ND	ND	ND	ND	ND	ND	ND
TOC [g kg−1]	37	28	41	ND	4–40	ND	39	19	19	21

^aSampling depth: upper 2–3 cm

^bSampling depth: 0–20 cm

^cThis study

^dBandowe and Wilcke (2010)

^eBrorström-Lundén et al., (2010)

^fWilcke et al., (2014a)

^gSun et al., (2017)

^hBandowe et al., (2019)