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RESEARCH PRODUCT
Microwave muffle furnace assisted decomposition of vegetable samples for flame atomic spectrometric determination of Ca, Mg, K, Fe, Mn and Zn
Amparo SalvadorÁNgel Morales-rubioM. De La Guardiasubject
MagnesiumMicrowave ovenAnalytical chemistrychemistry.chemical_elementManganeseZincBiochemistrylaw.inventionchemistry.chemical_compoundchemistryAshingNitric acidlawMuffle furnaceAtomic absorption spectroscopydescription
Calcium, magnesium, potassium, iron, manganese and zinc can be accurately determined in vegetable samples by flame atomic absorption and flame emission spectrophotometry after a previous dry ashing of the sample in a microwave muffle furnace. This treatment is carried out in 45 min using a new accessory developed by us to obtain high temperatures on a domestic microwave oven. Sample ashes, obtained in the muffle, are diluted with nitric acid and the obtained slurry is introduced directly into an air-C2H2 flame for the analysis of Fe, Mn, and Zn, or injected into a double-channel FIA manifold to determine Ca, Mg and K. The obtained results agree with those certified and also with those obtained by a previous dry ashing in a conventional muffle furnace and they are more precise for all the determined elements.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-04-01 | Fresenius' Journal of Analytical Chemistry |