RESUMO
The paper provides the results of gas chromatographic analysis of organic impurities in the drinking water after its contact with various packs and filters made from polymer materials. Vapor-phase analysis in combination with selective gas chromatographic detectors was used to determine volatile substances and liquid extraction in combination with chromatographic mass-spectrometry was employed to identify high-boiling compounds. The release sources of toxic compounds from materials to water, the taste and odor of which is affected by them were studied.
Assuntos
Filtração/instrumentação , Compostos Orgânicos/análise , Polímeros/química , Embalagem de Produtos/instrumentação , Poluentes Químicos da Água/análise , Água/química , Ingestão de Líquidos/efeitos dos fármacos , Cromatografia Gasosa-Espectrometria de Massas/métodos , HumanosRESUMO
A selective chromatographic mass-spectrometric procedure was developed to determine of air styrene, phenol, and naphthalene in the concentration range of 0.001-0.05 mg/m3, Analysis used preconcentration of the compounds on a solid sorbent, followed by thermal desorption into the capillary column of a chromatograph. Qualitative and quantitative measurements of concentrations were carried out by the characteristics chosen for each compound. The maximum relative measurement error in 1-2-liter air sampling was +/- 23% at a 0.95 significant confidence. The analytic procedure was tested on real objects.
Assuntos
Ar/análise , Cromatografia Gasosa-Espectrometria de Massas/métodos , Naftalenos/química , Fenóis/química , Estireno/química , Local de Trabalho , HumanosRESUMO
Gas chromatographic method has been developed to identify chloropicrin in the drinking water, which is based on its separation from water by statistic gas extraction and on the analysis of equilibrium vapor phase on a capillary column with electron-capture and nitrogen-phosphorus detectors connected in series. The method allows chloropicrin to be detected at the level of 5 mg/dm3 with a total measurement error of +/- 10% at a confidence probability of 0.95. The paper shows that the sensitivity of identification can be significantly increased.
