Major mineral applications by INAA include rocks, soils, sediments (both stream and lake bottom) humus, vegetation and heavy minerals. The INAA technique allows for multiple elements to be determined simultaneously and a small sample size can be used. A major advantage of INAA analysis is the fact that the sample does not have to be put into solution, particularly beneficial for some geological matrices where complete dissolution is difficult to effect. This method is quite sensitive, accurate and precise, and is used to analyze for minor and select trace elements in low concentrations. INAA is very good for Au, Co, As, Sb, W, Ta, U, Th, Cs, In, Re, Cl and lower levels of most LREE.