This document specifies a method for the determination of the following elements in digest or extraction solutions of soil, treated biowaste and sludge: Aluminium (Al), antimony (Sb), arsenic (As), barium (Ba), beryllium (Be), bismuth (Bi), boron (B), cadmium (Cd), calcium (Ca), cerium (Ce), chromium (Cr), cobalt (Co), copper (Cu), gallium (Ga), indium (In), iron (Fe), lanthanum (La), lead (Pb), lithium (Li), magnesium (Mg), manganese (Mn), mercury (Hg), molybdenum (Mo), neodymium (Nd), nickel (Ni), phosphorus (P), potassium (K), praseodymium (Pr), samarium (Sm), scandium (Sc), selenium (Se), silicon (Si), silver (Ag), sodium (Na), strontium (Sr), sulfur (S), tellurium (Te), thallium (Tl), thorium (Th), tin (Sn), titanium (Ti), tungsten (W), vanadium (V), zinc (Zn) and zirconium (Zr). This multi-element determination method is applicable to extracts obtained with nitric acid or aqua regia. The method is also applicable for other extracts or digests originating from e.g. DTPA extraction, fusion methods or total digestion methods, provided the user has verified the applicability[1-8]. The choice of calibration method depends on the extractant and can be adapted to the extractant concentration. The method has been validated for the elements given in Annex A. The method is applicable for the other elements listed above, provided the user has verified the applicability.