Flow injection on-line ultrasound-assisted extraction of iron in meat samples coupled to a flame atomic absorption spectrometric system

Abstract

Iron was extracted on-line from solid meat samples by a simple and rapid continuous ultrasound-assisted extraction system (CUES). The CUES is connected to a flow injection manifold, which allows the on-line flame atomic absorption spectrometric determination of iron. A Plakett-Burman design was used for the optimisation of the CUES. The method achieved a total sampling frequency of 11 samples per hour with a relative standard deviation for the complete procedure of 0.4%. The detection limit was 0.6 microg g(-1) (dry mass) for a sample amount of 30 mg. Accurate results were obtained by measuring the certified reference materials BCR-186 (pig kidney) and BCR-184 (bovine muscle). The analytical procedure was applied to different real meat samples with satisfactory results.

A multivariate study of the performance of an ultrasound-assisted madder dyes extraction and characterization by liquid chromatography-photodiode array detection

“…Using ultrasound, full extractions can now be completed in some minutes with high reproducibility, reducing the quantity of solvent and simplifying manipulation. Several groups of chemical components such as aromas, pigments, antioxidants, and other organic and mineral compounds have been extracted and efficiently analyzed from a variety of matrices (mainly animal tissues, food and plant materials) [18][19][20][21][22][23][24][25].…”

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

“…They also applied the procedure to the determination of Fe in meat. 3 Burguera, et al developed 4 a flow-injection microwaveassisted mineralization and a precipitation/dissolution system for the determination of molybdenum in blood serum and whole blood by ETAAS. After irradiation, molybdenum was precipitated by merging with potassium ferrocyanide, collecting on the walls of a knotted reactor, and finally being dissolved in 1 mL of 3.0 mol L 21 NaOH.…”