Four samples of each fruit residue type were subjected to proximate and ultimate analyses according to the methods described in Table 1. A laboratory oven (Memmert 100, Schwabach, Germany) was used to determine MC and calculation was made as percent wet basis (% wb). A muffle furnace (Carbolite 1100, London, UK) was required for other proximate analyses where values are expresses as weight percent, dry basis (wt.% db). Samples were selected for elemental analyses, namely seed and peel samples of ‘Chok Anan’ for mango and ‘Hong Huay’ for litchi and ‘Daw’ for longan