Back to Basics
When it comes to sample prep, simple analytical ideas may prove more effective than expensive solutions.
José Manuel Florêncio Nogueira |
Over the past three decades, a huge number of analytical solutions have been proposed for sample preparation in combination with chromatographic or hyphenated techniques. The complexity of many matrices, as well as the trace levels found in the samples, gave rise to what appeared to be novel ideas and modern concepts, most of them in compliance with the green analytical chemistry (GAC) principles. Good examples of well-established sample enrichment techniques are solid phase microextraction (SPME) and stir-bar sorptive extraction (SBSE), introduced around 25 and 15 years ago, respectively (1).
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