A fast microwave-assisted procedure for loss on drying determination in saccharides

Journal of the Brazilian Chemical Society

Cezar A Bizzi²  Juliano S Barin¹  Aline L Hermes²  Sergio R Mortari¹  Érico M. M Flores² 

[1] ,Universidade Federal de Santa Maria Departamento de Química Santa Maria RS ,Brazil

关键词: loss on drying;    saccharides;    microwave;    food and pharmaceutical samples;   

DOI  :  10.1590/S0103-50532011000200026

来源: SciELO

【 摘 要 】

A fast procedure for loss on drying (LOD) determination was developed using microwave radiation. Samples of commercial saccharides were dried and the influence of sample position inside the microwave cavity, sample mass and irradiation time were evaluated. Sample mass of 1 g and irradiation time between 15 to 25 min were enough to LOD determination for all saccharides. Results obtained using the proposed microwave-assisted loss on drying (MALOD) procedure were compared with those obtained by conventional LOD determination using an oven and no statistical difference was found among results of these techniques. Using MALOD procedure the relative standard deviation was below 1%. The time for analysis was reduced from 2.4 to 15 times when compared to conventional LOD determination and up to 16 samples could be simultaneously processed making MALOD procedure suitable for routine analysis.

【 授权许可】

CC BY   
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