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Proces odparowania rozpuszczalnika jako istotny etap procedury przygotowania próbek środowiskowych do oznaczania wybranych zanieczyszczeń organicznych

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Warianty tytułu
EN
Solvent evaporation as an important step in sample preparation method prior to environmental organic pollutants analysis
Języki publikacji
PL
Abstrakty
PL
Proces odparowania rozpuszczalnika jest jednym z częściej występujących etapów w wielu metodach przygotowania próbki do oznaczania analitów. Może on być zrealizowany z wykorzystaniem różnych przyrządów (wyparki próżniowej, aparatu Kuderny-Danisha. zestawu do odparowywania w strumieniu gazu obojętnego). Celem odparowania rozpuszczalnika jest zapewnienie kompatybilności z kolejnym etapem procesu przygotowania próbki lub metodą oznaczenia końcowego, a także zwiększenie stężenia analitów w próbce. W pracy przedstawiono przyczyny powstawania strat analitów w trakcie procesu odparowania rozpuszczalnika oraz podano charakterystykę poszczególnych metod. W postaci tabelarycznej przedstawiono wady i zalety poszczególnych metod oraz porównano możliwości ich zastosowania w oznaczaniu zanieczyszczeń środowiska. Omówiono możliwe źródła błędów podczas procesu odparowania oraz możliwości ich ograniczenia. Opisano prostą metodę obniżenia strat analitów przez zastosowanie substancji wysokowrzącej (ang. keeper) podczas odparowania rozpuszczalnika. Przedstawiono warunki konieczne do uzyskania miarodajnych wyników analizy.
EN
In many sample preparation methods the process of a solvent evaporation is usually included. The purpose is to increase the analytes' concentration in the sample. This step could be performed in many ways i.e.: using the rotavapor, Kuderna-Danish apparatus and in a gentle stream of ambient gas or using commercially available automated systems. Another aim of the solvent evaporation is to make the sample (extract) compatible with the clean up technique or with the final analysis method. In this article the characteristics of various solvent evaporation techniques were presented. Advantages and disadvantages of various solvent evaporation methods were discussed. The sources of errors during solvent evaporation were described and the possible methods of the errors elimination were proposed. One of the solution is the addition of a high boiling point solvent (keeper) during the evaporation step. Repeatability of the solvent evaporation process is a necessary condition to get reasonable final results.
Czasopismo
Rocznik
Strony
153--161
Opis fizyczny
Bibliogr. 41 poz., rys., tab.
Twórcy
  • Pracownia naukowo-dydaktyczna "Ogólniak", 85-485 Bydgoszcz, ul. Magnoliowa 4
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPG8-0074-0008
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