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Type: Artigo de periódico
Title: On-line Microwave Slurry Sample Digestion Using Flow Systems For The Spectrophotometric Determination Of Iron In Seafood
Author: Pereira Fo E.R.
Rohwedder J.J.R.
Arruda M.A.Z.
Abstract: A method for the spectrophotometric determination of iron in seafood slurry samples based on microwave assisted digestion has been developed. The stabilized slurry (200 μl) is introduced in a flow system and transported by an air carrier stream to a digestion coil positioned inside the microwave oven. After the digestion step (10 or 20 min at maximum power) the flushing solution is collected in a calibrated flask. A 200 μl-digested sample is introduced in a flow injection system and the iron determined at 512 nm with 1,10-phenanthroline. The proposed method features a linear range from 50 to 200 μg l-1 (r > 0.999) presenting a precision, expressed as RSD, of 3.7% (n = 10) for repeatability and 5.0% (n = 30) for reproducibility. Accuracy was assessed by using Standard and Certified Reference Materials.
Rights: aberto
Identifier DOI: 10.1039/a708060c
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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