Research Article
Influence of Digestion Procedure and Residual Carbon on Manganese, Copper, and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry
Table 2
Parameters modifications as applied to microwave digestion.
| | Modification number | Ia | Ib | Ic | Id | Ie | If | Ig |
| | Final temperature (°C) | 197 | 211 | 209 | 216 | 178 | 106 | 142 | | Final pressure (bar) | 46 | 60 | 60 | 60 | 37 | 16 | 22 | | Heating time (min) | 10 | 10 | 10 | 5 | 5 | 5 | 5 | | Holding time (min) | 5 | 10 | 15 | 15 | 5 | 5 | 5 | | Cooling time (min) | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
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