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IAEA-408

Sediment (Tagus estuary, Portugal)   Out of stock!
Inorganic   Sediment

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]
HCB0.410.30 - 0.57
γ-HCH (Lindane)0.190.11 - 0.21
pp' DDE1.40.9 - 2.0
pp' DDT0.670.48 - 0.98
Dieldrin0.300.30 - 0.48
PCB 280.790.35 - 0.98
PCB 520.600.38 - 0.93
PCB 1011.20.8 - 1.7
PCB 1050.570.44 - 0.67
PCB 1100.830.50- 0.90
PCB 1181.20.9 - 1.6
PCB 1280.330.27 - 0.53
PCB 1381.61.1 - 2.1
PCB 1491.41.3 - 1.6
PCB 1531.91.0 - 2.1
PCB 1700.470.34 - 0.59
PCB 1801.10.9 - 1.2
PCB 1870.680.49 - 0.94
PCB 1940.200.18 - 0.23

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

Petroleum Hydrocarbons

AnalyteUnitRecommended value*95% Confidence interval**
Resolved Aliphaticsμg/g116 - 17
n - C17ng/g7456 - 140
Pristaneng/g6950 - 130
Phytaneng/g7863 - 130
Σ n-Alkanes (C14 - C34)μg/g8.14.3 - 12.0
Phenanthreneng/g3521 - 43
Anthraceneng/g9.88.0 - 13.0
Chryseneng/g3525 - 56
Fluorantheneng/g8453 - 110
Pyreneng/g7757 - 93
Benzo[b]fluorantheneng/g4632 - 69
Benzo[k]fluorantheneng/g4626 - 61
Benz[a]anthraceneng/g5335 - 60
Peryleneng/g320140 - 420
Benzo[e]pyreneng/g5551 - 81
Benzo[a]pyreneng/g4830 - 63
Naphthaleneng/g2716 - 47
Benzo[g,h,i]peryleneng/g3820 - 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-HCH0.610.21 - 1.50
β-HCH0.550.38 - 1.70
pp' DDD0.870.56 - 1.70
op DDD0.190.18 - 0.33
op DDT0.380.09 - 3.80
Heptachlor0.420.23 - 0.70
Heptachlor epoxide0.640.43 - 1.50
Aldrin0.410.20- 2.30
Endrin0.570.14 - 1.20
α-Endosulfan1.60.3 - 6.2
Endosulfan sulfate1.60.5 - 8.2
α-Chlordane0.120.10 - 0.34
γ-Chlordane0.270.06 - 0.48
Aroclor 12541914 - 40
Aroclor 1260107 - 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 80.240.22 - 4.60
PCB 180.740.13 - 1.90
PCB 310.430.09 - 1.50
PCB 440.470.23 - 3.00
PCB 490.350.22 - 0.38
PCB 870.870.26 - 1.10
PCB 1560.360.31 - 0.39
PCB 1740.340.20 - 0.44
PCB 1770.350.23 - 0.43
PCB 1830.320.26 - 0.33
PCB1950.120.06 - 0.16
PCB 1960.220.17 - 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 Chryseneμg/g6.04.6 - 19.0
UVF equivalent ROPME oilμg/g4935 - 120
Total aliphaticsμg/g12081 - 160
Unresolved aliphaticsμg/g11068 - 150
n - C18ng/g9060 - 110
Total aromaticsμg/g3.71.3 - 11.0
Resolved aromaticsμg/g1.90.24 - 6.8
2 Methyl-phenanthreneng/g1212 - 14
1 Methyl-phenanthreneng/g109.2 - 11
Fluoreneng/g6.74.6 - 24.0
1 Methyl-naphthaleneng/g7.54.7 - 12.0
2 Methyl-naphthaleneng/g1413 - 33
Indeno[1,2,3,cd]pyreneng/g5145 - 53
Dibenz[ah]anthraceneng/g118 - 14
Acenaphthyleneng/g3.62.1 - 4.7
Acenaphtheneng/g3.32.0 - 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).


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