Abstract
An optimisation of the ICP-AES determination of Fe, Cu and Zn in tinned mussels has been carried out. The optimum conditions for the radio frequency power, peristaltic pump flow, plasma gas flow, nebuliser gas pressure, auxiliary gas flow and observation height above load coil were determined manually for each element, since the Simplex method was less adequate. Scans were carried out with the aim of finding the most sensitive spectral lines, whose intensity did not always coincide with literature data. Limits of detection, linearity, precision, and accuracy were also investigated. The possible spectral interferences due to Na, K, Ca, Mg, P, I and nitric acid were studied from three different points of view and the results did not agree. The influence of the matrix on the determination of the above elements in tinned food from the Galician Rias (in the south coast of Galicia) was also studied. The results obtained were comparable to those obtained by AAS.
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