Abstract
Abstract One of the most important analytical problems is the sample preparation to measure the total concentration of elements. Ashing procedure and microwave preparation are two important methods used. Ashing procedure is based in the mineralization of the sample in a furnace for 6 to 8 hours at 400 to 500°C followed by acid dissolution. Microwave digestion is based in an acid attack of the sample favoured by electrothermal radiation for some minutes. Organic residues are often used as soil amendments in agriculture. Some of them like sewage sludge and urban residues have heavy metals in their composition. It is important to measure them in order to establish their adequate use and minimize the potential environmental pollution. In this work, cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn) were analyzed in six residues from agriculture (almonds residue), cities (urban refuses from Madrid and Gandia‐Valencia), and three sewage sludge from a tou...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
