Mahan, K I Microwave digestion techniques in the sequential extraction of calcium, iron, chromium, manganese, lead, and zinc in sediments. [electronic resource] - Analytical chemistry Apr 1987 - 938-45 p. digital Publication Type: Journal Article ISSN: 0003-2700 Standard No.: 10.1021/ac00134a003 doi Subjects--Topical Terms: Calcium--analysisChromium--analysisFresh Water--analysisIron--analysisLead--analysisManganese--analysisMetals--analysisMicrowavesZinc--analysis