Ethylbenzene

Monitoring data

Administrative data

Endpoint:

monitoring data

Type of information:

other: publication

Adequacy of study:

supporting study

Study period:

1996

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Acceptable, well-documented publication

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

publication

Title:

Purgeable aromatic hydrocarbons in water and sediment from the River Morava catchment (Slovakia).

Author:

Al-Rekabi, H. et al.

Year:

1996

Bibliographic source:

Bull. Environ. Contam. Toxicol. 56:90-97

Materials and methods

Principles of method if other than guideline:

Modified EPA method 503.1: open-loop dynamic headspace technique adapted according to Bianchi et al. (1991, J. Chromatogr 542: 413-450)

GLP compliance:

not specified

Type of measurement:

natural background concentration

Media:

other: water and sediment

Test material

Test material information

Constituent 1

Reference substance name:

Ethylbenzene

EC Number:

202-849-4

EC Name:

Ethylbenzene

Cas Number:

100-41-4

Molecular formula:

C8H10

IUPAC Name:

ethylbenzene

Details on test material:

- Name of test material (as cited in study report): Ethylbenzene

Study design

Details on sampling:

- Sample storage before analysis: Samples were transorted in a cool box.

Results and discussion

Details on results:

None

Any other information on results incl. tables

The mean of the peak area and % relative standard deviation (RSD) for different concentrations of ethylbenzene in water and sediment using PTI-GC:

reagent water river water sediment

(Conc.: 0.1 µg/l, 0.1 µg/kg)
area231522631732
%RSD8.910.713.2
(Conc.: 1 µg/l, 1 µg/kg)
area18273166799291
%RSD9.46.97.6
(Conc.: 10 µg/l, 10 µg/kg)
area16323214774173875
%RSD4.85.49.0
(Conc.: 100 µg/l, 100 µg/kg)

area13529091327799724698
%RSD5.52.810.0

Recoveries and method detection limits (MDL):
Water: recovery: 93.7 %RSD: 8.1 MDL: 0.03 mg/l
sediment: recovery: 55.7 %RSD: 13.6MDL: 0.04 mg/kg

The results indicated that seasonal fluctuation in the concentration is primarily a function of temporal changes in volatile loadings and the temperature variation in the river ecosystem.

Detectable concentrations ethylbenzene in water samples (µg/l):
River Mlaka (station 8): only spring 1.55; Mlaka (station 9) only in spring 4.69
Detectable concentrations of ethylbenzene in sediment samples (µg/l):
River Mlaka (station 8): only in spring 2.66; Mlaka (station 9): in winter 6.84 and in spring 4.69

Station 1-7, in water and sediment samples: ethylbenzene was not detectable

Applicant's summary and conclusion

Conclusions:

Ethylbenzene was detected in the spring at Mláka 8 and 9 in both water and sediment samples.

Executive summary:

Myjava and Rudava Rivers contained relatively higher concentrations of volatile aromatics than Malina and Mláka Rivers. The changes in water quality, which may occur with season, may have a direct relation on the accumulation and evaporation of volatile aromatics in water and sediment . The typical temperate ecosystem might show a spring season of a high run-off and a high water level causing turbid waters . Both these effects would tend to increase the concentration of volatile aromatics present in - water

and sediment. Because the volatile aromatic compounds routinely represent a large portion of total VOCs in water and sediment, by knowing their concentration in water and sediment one can evaluate the water quality of the River Morava.