Determination of monoaromatic hydrocarbons (BTEX) in surface waters from a Brazilian subtropical hydrographic basin.

Determination of monoaromatic hydrocarbons (BTEX) in surface waters from a Brazilian subtropical hydrographic basin.

Bulletin of environmental contamination and toxicology (2014-02-18)

Andreia Neves Fernandes, Cindy Duarte Gouveia, Marco Tadeu Grassi, Janaina da Silva Crespo, Marcelo Giovanela

ZUSAMMENFASSUNG

This study examined surface water samples for the presence of the monoaromatic hydrocarbons benzene, toluene, ethylbenzene and xylene. Water samples were collected from the sub-basin of the Tegas River and the Marrecas Stream microbasin located in the metropolitan region of the municipality of Caxias do Sul (Rio Grande do Sul State, Brazil). For all sampling points evaluated, only toluene was detected, with concentrations values in the range of 1.70-18.44 μg L(-1). In general, the relatively high toluene concentration for the samples collected were above the limit of 2 μg L(-1) established by the Brazilian government for Class I rivers for the protection of aquatic life. However, they were well below the established limit of 170 μg L(-1) in water used for human consumption.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

179418

Sigma-Aldrich

Toluol, ACS reagent, ≥99.5%

650579

Sigma-Aldrich

Toluol, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%

244511

Sigma-Aldrich

Toluol, anhydrous, 99.8%

270709

Sigma-Aldrich

Benzol, suitable for HPLC, ≥99.9%

319953

Sigma-Aldrich

Benzol, ACS reagent, ≥99.0%

12540

Supelco

Benzol, analytical standard

401765

Sigma-Aldrich

Benzol, anhydrous, 99.8%

320552

Sigma-Aldrich

Toluol, ACS reagent, ≥99.5%

32212

Sigma-Aldrich

Benzol, puriss. p.a., reag. Ph. Eur., ≥99.7%

E12508

Sigma-Aldrich

Ethylbenzol, ReagentPlus^®, 99%

CRM48617

Supelco

Benzol -Lösung, certified reference material, TraceCERT^®, 200 μg/mL in methanol

PHR1310

Supelco

Benzol, Pharmaceutical Secondary Standard; Certified Reference Material

89680

Supelco

Toluol, analytical standard

296848

Sigma-Aldrich

Ethylbenzol, anhydrous, 99.8%

PHR1311

Supelco

Toluol, Pharmaceutical Secondary Standard; Certified Reference Material

03079

Supelco

Ethylbenzol, analytical standard

PHR1317

Supelco

Toluol, Pharmaceutical Secondary Standard; Certified Reference Material

40084

Supelco

Toluol -Lösung, certified reference material, 5000 μg/mL in methanol

676756

Sigma-Aldrich

Toluol, ACS reagent, ≥99.5%

487104

Supelco

Ethylbenzol -Lösung, suitable for NMR (reference standard), 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in.

CRM48620

Supelco

Toluol-Lösung, certified reference material, TraceCERT^®, 200 μg/mL in methanol, ampule of 1 mL

PHR1229

Supelco

Ethylbenzol, Pharmaceutical Secondary Standard; Certified Reference Material

708046

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 10% in chloroform-d (99.8 atom % D)

736198

Supelco

Ethylbenzol -Lösung, suitable for NMR (reference standard), 10% in chloroform-d (99.8 atom % D), NMR tube size 5 mm × 8 in. , ultra-thin wall

717967

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 0.1% in chloroform-d (99.8 atom % D), TMS 0.1 %

708054

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 0.1% in chloroform-d ("100%", 99.96 atom % D)

714917

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in. , ultra-thin wall

612065

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 10 mm × 8 in.

717959

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 1% in chloroform-d (99.8 atom % D)

551341

Sigma-Aldrich

Ethylbenzol -Lösung, suitable for NMR (reference standard), 5% in chloroform-d (99.8 atom % D), TMS 2 %, NMR tube size 5 mm × 8 in.