Following 6-h incubation at room temperature, samples were heated at 160oC, and completely digested samples were evaluated by F-AAS (AA-680; Shimazu, Tokyo, Japan), as described previously
The following 6 h incubation at room temperature sample heated to 160oC and must be evaluated by an F-AAS (AA-680 Tsu Shima. Tokyo Japan As explained earlier.
Following incubation 6 hours at room temperature, the sample was heated to 160 ° C and completely decomposed samples were evaluated by F-AAS. (AA-680; Shimazu, Tokyo, Japan) as described previously.