A new validated analytical method for the determination of tributyltin in water samples at the quantification level set by the European Union.
J Chromatogr A
; 1261: 151-7, 2012 Oct 26.
Article
em En
| MEDLINE
| ID: mdl-22889600
ABSTRACT
According to recent directives of the European Union (EU), limits of quantification (LOQ) for the determination of tributyltin (TBT) in surface waters should be ca. 60 pg/L (ppq). This put very stringent requirements on analytical methodologies; definitely when they have to be applied in a routine environment. Stir bar sorptive extraction (SBSE), followed by thermal desorption (TD) and capillary gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS) can provide accurate and precise data at the 2 ng/L level (ppt). For lower concentrations, matrix and reagent interferences together with contamination may provide too high TBT values. A two-dimensional heart-cut GC method was developed to fractionate TBT from interferences. The GC-GC-MS/MS method shows excellent linearity in the range 50 pg/L-4 ng/L, good repeatability (RSD<20% at 200 pg/L), and a limit of detection of 11 pg/L. The method performance is demonstrated with representative samples i.e. harbor water and waste water samples.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Compostos de Trialquitina
/
Poluentes Químicos da Água
/
Monitoramento Ambiental
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article