Germanium dioxide

Monitoring data

Administrative data

Endpoint:

monitoring data

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1998-2001

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The FOREGS study is a recent European reference for ambient metal concentrations in the environment covering the whole of the EU with the same methodology.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2006

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

Systematic study of the EU environment , sampled in a 70km x 70km grid, on locations, not specifically influenced by identified sources. as such, ambient metal levels are determined throughout the EU with a same methodology.

GLP compliance:

not specified

Type of measurement:

other: ambient background concentration

Media:

surface water

Test material

Test material information

Constituent 1

Reference substance name:

Germanium

EC Number:

231-164-3

EC Name:

Germanium

Cas Number:

7440-56-4

Molecular formula:

Ge

IUPAC Name:

germanium(4+)

Test material form:

solid

Results and discussion

Concentration

Key result

Country:

other: Europe

Location:

several

Substance or metabolite:

other: element

Conc.:

< 0.009 µg/L

Remarks on result:

other: 50P of 0.45µm filtered fraction

Details on results:

Ge values in stream water range from 0.005 to 0.030 μg l-1 (20 and 80P, resp.).

Applicant's summary and conclusion

Conclusions:

Test carried out according to standard analytical techniques, consistent all over Europe, test results consistent, thus reliable for concluding on endpoint.

Executive summary:

The FOREGS study (2005) measured recent "ambient background" dissolved germanium concentrations in streamwaters all over the EU. The 50P value observed was 0.009 µg Ge/l .