Determination of trihalomethanes and pesticides in water by gas chromatography

Quimica nova

Carlos, Elenice A.¹  Reis, César¹  Neves, Antônio A.¹  Queiroz, Maria Eliana L. R. de¹ 

[1] Universidade Federal de Viçosa, Viçosa, Brasil

关键词: SPME;    THM;    pesticides.;   

DOI  :  10.1590/S0100-40422011000200019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A method for simultaneousanalysis of trihalomethanes and organochloride and pyrethroid pesticides inwater utilizing SPME-HS and GC-ECD was developed. In the optimized method 25mL of water containing 2% (w/v) Na2HPO4 were heated to60 °C for 50 min. The fiber (PDMS - 100 μm)was exposed to a headspace for the same period. For all analytes it was foundthat LOQ < MCL (Maximum Contaminant Level), CV < 20% and r >0.9. The method was applied to potable and surface water samples. Some trihalomethaneswere encountered in potable waters, at levels below the MCL.

【 授权许可】

CC BY