6533b836fe1ef96bd12a11b4

RESEARCH PRODUCT

Determination of essential metals in complete diet feed by flow injection and flame atomic absorption spectrometry

Amparo SalvadorM.t VidalC LlabataM. C. Pascual-martí

subject

Flow injection analysisChromatographyMicrowave ovenExtraction (chemistry)Analytical chemistryHydrochloric acidAnalytical Chemistrylaw.inventionDilutionchemistry.chemical_compoundchemistryAshinglawSample preparationAtomic absorption spectroscopySpectroscopy

description

A prior study of different sample pre-treatments for the determination of metallic elements in complete diet feeds was performed in order to choose the most suitable for these samples. The studied pre-treatment were: acid extraction (lixiviation), wet digestion (on microwave oven) and dry ashing mineralization (calcination). Lixiviation (acid extraction) with hydrochloric acid was selected due to its accuracy, fast and simple pre-treatment procedure. Due of the different levels of concentration of the metallic elements in the samples, the same manifold was used but with small variations. Copper (with on-line pre-concentration by chelating Chelex-100 resin), calcium (with on-line dilution) and iron determination gave suitable accuracy and precision and required a little time for analysis. Five different samples were analyzed by flow injection and the results were contrasted with dry ashing mineralization in batch procedure and with the labeled contents.

https://doi.org/10.1016/s0026-265x(02)00037-1