IAEA-408

Product tags

Inorganic (45)
,
Sediment (22)

€0.00

Sediment (Tagus estuary, Portugal)

Unit Size: 40 g
Price per Unit: 150 EUR
Report: IAEA/AL/121
Date of Release: 1/11/1999
Reference Sheet: download (pdf)
Contact point: NAEL-MESL.Contact-Point@iaea.org

A large sediment sample was collected from the mudflats of the Tagus estuary. This sediment was deep-frozen, freeze-dried, ground and sieved through a 150 μm stainless steel sieve.

The sediment fraction of particle size less than 150 μm was homogenized by mixing in a rotating drum for two weeks. Then, aliquots of about 40 g were packaged into glass bottles with aluminium screw caps and sealed with Teflon tape.

Recommended values (based on dry mass)

Pesticides and PCBs

Analyte	Recommended value* [ng g^-1]	95% Confidence interval**[ng g^-1]
HCB	0.41	0.30 - 0.57
γ-HCH (Lindane)	0.19	0.11 - 0.21
pp' DDE	1.4	0.9 - 2.0
pp' DDT	0.67	0.48 - 0.98
Dieldrin	0.30	0.30 - 0.48
PCB 28	0.79	0.35 - 0.98
PCB 52	0.60	0.38 - 0.93
PCB 101	1.2	0.8 - 1.7
PCB 105	0.57	0.44 - 0.67
PCB 110	0.83	0.50- 0.90
PCB 118	1.2	0.9 - 1.6
PCB 128	0.33	0.27 - 0.53
PCB 138	1.6	1.1 - 2.1
PCB 149	1.4	1.3 - 1.6
PCB 153	1.9	1.0 - 2.1
PCB 170	0.47	0.34 - 0.59
PCB 180	1.1	0.9 - 1.2
PCB 187	0.68	0.49 - 0.94
PCB 194	0.20	0.18 - 0.23

*Median values expressed on a dry mass basis
**95% confidence intervals of the median

Petroleum Hydrocarbons

Analyte	Unit	Recommended value*	95% Confidence interval**
Resolved Aliphatics	μg/g	11	6 - 17
n - C₁₇	ng/g	74	56 - 140
Pristane	ng/g	69	50 - 130
Phytane	ng/g	78	63 - 130
Σ n-Alkanes (C₁₄ - C₃₄)	μg/g	8.1	4.3 - 12.0
Phenanthrene	ng/g	35	21 - 43
Anthracene	ng/g	9.8	8.0 - 13.0
Chrysene	ng/g	35	25 - 56
Fluoranthene	ng/g	84	53 - 110
Pyrene	ng/g	77	57 - 93
Benzo[b]fluoranthene	ng/g	46	32 - 69
Benzo[k]fluoranthene	ng/g	46	26 - 61
Benz[a]anthracene	ng/g	53	35 - 60
Perylene	ng/g	320	140 - 420
Benzo[e]pyrene	ng/g	55	51 - 81
Benzo[a]pyrene	ng/g	48	30 - 63
Naphthalene	ng/g	27	16 - 47
Benzo[g,h,i]perylene	ng/g	38	20 - 52

*Median values expressed on a dry mass basis
**95% confidence intervals of the median

Information values (based on dry mass)

Please note that information values are not to be used for any assessment of analytical performance or similar; they are included to provide information about the expected mass fractions/concentration levels

Chlorinated Pesticides

Analyte	*Information value [ng g^-1]**	95% Confidence interval [ng g^-1]**
α-HCH	0.61	0.21 - 1.50
β-HCH	0.55	0.38 - 1.70
pp' DDD	0.87	0.56 - 1.70
op DDD	0.19	0.18 - 0.33
op DDT	0.38	0.09 - 3.80
Heptachlor	0.42	0.23 - 0.70
Heptachlor epoxide	0.64	0.43 - 1.50
Aldrin	0.41	0.20- 2.30
Endrin	0.57	0.14 - 1.20
α-Endosulfan	1.6	0.3 - 6.2
Endosulfan sulfate	1.6	0.5 - 8.2
α-Chlordane	0.12	0.10 - 0.34
γ-Chlordane	0.27	0.06 - 0.48
Aroclor 1254	19	14 - 40
Aroclor 1260	10	7 - 25

*Median values expressed on a dry mass basis
**95% confidence intervals of the median

PCBs Congeners

Analyte	*Information value [ng g^-1]**	95% Confidence interval [ng g^-1]**
PCB 8	0.24	0.22 - 4.60
PCB 18	0.74	0.13 - 1.90
PCB 31	0.43	0.09 - 1.50
PCB 44	0.47	0.23 - 3.00
PCB 49	0.35	0.22 - 0.38
PCB 87	0.87	0.26 - 1.10
PCB 156	0.36	0.31 - 0.39
PCB 174	0.34	0.20 - 0.44
PCB 177	0.35	0.23 - 0.43
PCB 183	0.32	0.26 - 0.33
PCB195	0.12	0.06 - 0.16
PCB 196	0.22	0.17 - 0.40

*Median values expressed on a dry mass basis
**95% confidence intervals of the median

Petroleum Hydrocarbons

Analyte	Unit	*Information value [ng g^-1]**	95% Confidence interval [ng g^-1]**
UVF equivalent Chrysene	μg/g	6.0	4.6 - 19.0
UVF equivalent ROPME oil	μg/g	49	35 - 120
Total aliphatics	μg/g	120	81 - 160
Unresolved aliphatics	μg/g	110	68 - 150
n - C₁₈	ng/g	90	60 - 110
Total aromatics	μg/g	3.7	1.3 - 11.0
Resolved aromatics	μg/g	1.9	0.24 - 6.8
2 Methyl-phenanthrene	ng/g	12	12 - 14
1 Methyl-phenanthrene	ng/g	10	9.2 - 11
Fluorene	ng/g	6.7	4.6 - 24.0
1 Methyl-naphthalene	ng/g	7.5	4.7 - 12.0
2 Methyl-naphthalene	ng/g	14	13 - 33
Indeno[1,2,3,cd]pyrene	ng/g	51	45 - 53
Dibenz[ah]anthracene	ng/g	11	8 - 14
Acenaphthylene	ng/g	3.6	2.1 - 4.7
Acenaphthene	ng/g	3.3	2.0 - 17.0

*Median values expressed on a dry mass basis
**95% confidence intervals of the median

Sterols

Information values for sterol compounds (Coprostanol, Cholesterol, Cholestanol, β-Sitosterol, Campesterol and Stigmasterol) are available in the report (attached).

The values listed above were established on the basis of statistically valid results submitted by laboratories which had participated in one or more international interlaboratory comparisons organized by the IAEA Marine Environment Laboratory, Monaco. The details concerning the criteria for qualification as a recommended or information value may be found in the respective report (attached).