NEN 6447-1979 Sample preparation of sludge or water containing sludge for the determination of elements by atomic absorption spectrophotometry - Destruction with nitric acid and perchloric acid
The standard applies to all types of sludge and sludge-containing water. After digestion, the elements in the debris can be determined. Notes 1. The applicability of this digestion is indicated for each element separately in the relevant standard for the determination. 2. Despite the particularly powerful digestion method, salts and oxides that are difficult to dis olve will not be brought into solution using the described method. Access by making a melt can then offer a solution. 3. If the elements are enclosed in a silicic acid skeleton (sand and clay), the digestion with nitric acid and perchloric acid is not complete. A treatment with hydrogen fluoride can then offer a solution.
NEN 6447-1979 history
1979NEN 6447-1979 Sample preparation of sludge or water containing sludge for the determination of elements by atomic absorption spectrophotometry - Destruction with nitric acid and perchloric acid