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|Type:||Artigo de periódico|
|Title:||Determination of Selenium in Liquid Dietetic Sweeteners by GF AAS|
|Author:||de Sousa, RA|
|Abstract:||Graphite furnace atomic absorption spectrometry was used to determine Se in liquid dietetic sweeteners. The optimized pyrolysis and atomization temperatures were 1,100 and 1,900 A degrees C, respectively. Since there is not a certified reference material for sweeteners, addition and recovery experiments were used to evaluate the accuracy of the proposed method. The obtained recovery values were between 94% and 108%, without the use of a mineralization step, except for the aspartame sweeteners. The instrument limit of detection was 0.02 A mu g L(-1) and the relative standard deviations were below 6.4%. The methods studied were applied to different kinds of sweeteners having cyclamate-saccharine, cyclamate-saccharine-stevioside, or aspartame. The analyte concentrations were compared with the limits established for inorganic species in foods by ANVISA (Brazilian Agency for Health and Safety). The results indicate that there is a huge variation in the concentration of selenium in the 27 samples studied and that the values can be considered relatively high for the sweeteners with cyclamate/saccharine and cyclamate/saccharine/stevioside contents.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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