A non-destructive multi-element determination using a cold neutron-induced prompt γ-ray analysis (PGA) has been investigated. The elements H, C, N, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Mn, Fe, Co, Cd, Sm, Gd and Hg were determined by a comparative standardization using the cold neutron guided beams of JRR-3M (upgraded Japan Research Reactor No. 3). To accurately determine the amounts of elements, possible interferences by other elements and background counts were examined and evaluated. Many elements in several reference materials, such as geological, environmental, and biological samples, coal and fuel oil, were determined, and the accuracy and precision of a multi-element determination were estimated. Toxic elements as, such Cd and Hg, at μg/g levels were accurately determined in environmental samples. The detection ma limits in various trices were from 25 to 820ng/g for Cd, Sm and Gd, 1.1 to 820μg/g for H, Na, S, Cl, K, Ti, Mn, Co and Hg, and 0.031 to 10% for C, N, Mg, Al, Si, P, Ca and Fe.
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