Strontium neodecanoate

Monitoring data

Administrative data

Endpoint:

monitoring data

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

retrieval date: 2016-05-09

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The European Geochemical Mapping of Agricultural and Grazing Land Soil (GEMAS) project provides high-quality data of ambient metal concentrations in agricultural and grazing land soil. Samples from 33 out of 38 European countries were analysed to develop a harmonised geochemical database for soils.

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference 1

Reference Type:

other: GEMAS database

Title:

Chemistry of Europe’s agricultural soils - Part A: Methodology and interpretation of the GEMAS data set.

Author:

Reimann et al.

Year:

2014

Reference 2

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

The European Geochemical Mapping of Agricultural and Grazing Land Soil (GEMAS) project measured ambient metal concentrations in agricultural and grazing land soils and analysed samples from 33 out of 38 European countries to develop a suitable harmonised geochemical database for soils. Measured concentrations were statistically analysed for EU countries plus Norway.

GLP compliance:

no

Type of measurement:

other: ambient concentration

Media:

soil

Test material

Test material information

Constituent 1

Reference substance name:

not applicable

IUPAC Name:

not applicable

Test material form:

other: strontium in the environment

Specific details on test material used for the study:

Reporting of ambient Sr concentrations in agricultural soil.

Study design

Details on sampling:

Sampling:
The GEMAS project area of 5,600,000 km2 was divided into a grid with 50 km x 50 km cells. Samples for agricultural and grazing land soil were collected across Europe to develop a suitable harmonised geochemical database for soils. Within each 2500 km² cell, the collection site was freely selectable to collect the 'most representative' sample.

Agricultural land soil samples:
The minimum size of the plot was set to 25x50m for a regularly ploughed agricultural field (arable land). The ploughing soil layer (Ap-horizon) of agricultural land was collected at a depth of 0 - 20 cm.

Grazing land soil samples:
A sizeable plot of grazing land, which is not regualary ploughed. If no grazing land was available within the cell, any plot with undisturbed permanent grass cover was sampled. The topmost part soil on grazing land was collected at a depth of 0 – 10 cm.

Results and discussion

Any other information on results incl. tables

Table 1: Agricultural soil concentrations

Parameter	Unit	Method	#	Min	Max	Mean	STD	50p	90p
CEC	meq/100g	AAS	2,108*^1 1,867*^2	1.80	48.30	17.93 17.25	8.77 8.44	16.40 15.80	30.33 29.10
pH (CaCl2)	pH	pH-meter	2,108*^1 1,867*^2	3.32	7.98	5.88 5.85	1.10 1.12	5.77 5.71	7.36 7.37
TOC	%	IR	2,095*^1 1,854*^2	0.40	46.00	2.55 2.62	3.98 4.21	1.80 1.70	3.90 4.10
Sr	mg/kg	AR	2,108*^1 1,867*^2	0.78	3,776.61	53.39 55.53	147.88 156.17	18.10 16.99	104.37 113.26
Sr	mg Sr/kg	XRF	2,108*^1 1,867*^2	7.00	4,564.00	144.38 150.10	183.30 192.51	101.00 104.00	259.00 266.00
Sr	mg/kg	MMI	2,108*^1 1,867*^2	< 0.01	90.2	2.65 2.46	4.52 4.26	1.67 1.50	5.19 4.82
Sr	%	AR/XRF	2108*^1 1867*^2	1.21	219.67	28.05 27.37	24.48 25.15	18.75 17.24	71.00 73.28
Sr	%	MMI/AR	2108*^1 1867*^2	> 0.01(0.01488)	51.05	9.64 9.10	6.39 6.23	8.40 7.68	18.01 17.33

*¹EU – ALB, BEL, MAL, MLD, ROM

*²EU-28 plus NOR without MAL

 

Table 2: Grazing land soil concentrations

Parameter	Unit	Method	#	Min	Max	Mean	STD	50p	90p
CEC	meq/100g	AAS	2,023*^1 1,781*^2	2.54	49.88	20.42 20.01	9.39 9.32	18.75 17.96	33.87 33.42
pH (CaCl2)	pH	pH-meter	2,022*^1 1,780*^2	3.26	8.06	5.68 5.63	1.16 1.17	5.45 5.38	7.33 7.33
TOC	%	IR	2,022*^1 1,780*^2	0.41	49.00	4.05 4.24	5.36 5.63	2.70 2.80	6.80 7.00
Sr	mg/kg	AR	2,023*^1 1,781*^2	0.63	4,246.66	59.48 62.92	204.43 216.75	17.84 17.22	105.01 119.40
Sr^3	mg/kg	XRF	2,023*^1 1,781*^2	7.00	8,072.00	145.54 152.74	307.00 324.97	90.00 92.00	252.00 260.00
Sr	%	AR/XRF	2023*^1 1781*^2	1.28	119.40	30.09 29.69	25.40 26.15	21.02 19.56	74.38 76.90

*¹EU – ALB, BEL, MAL, MLD, ROM

*²EU-28 plus NOR without MAL

Applicant's summary and conclusion

Conclusions:

In agricultural soil, ambient concentrations of Sr range from <1 to 3777 mg/kg Sr with 50th and 90th percentiles of 18 and 104 mg/kg Sr, respectively.
Ambient strontium levels (measured in AR extracts) of grazing land soils range from <1 to 4,247 mg/kg Sr with 50th and 90th percentiles of 18 and 105 mg/kg Sr, respectively.