ABSTRACT: Due to has a lot of potential that can be utilized and the increasing number and availability of sustainable wood bark, that was originally from wood industry waste, began to become the center of attention. Bark extracts (tanin) is one of the potentials contained in the bark that can be obtained by extraction. Wood bark  may be used for various purposes such as preservatives, tannins, adhesives, dyes, pharmaceuticals or other industrial chemicals. This study aims to determine the content of extracts (tannin) contained in the bark of Eucalyptus deglupta Blume and to determine the physical and chemical properties of extracts and the tannin reactivity.
The study used four different solvents to extract tannins. E. deglupta bark powder extracted with water, 0.5% Na2CO3 solvent, 0.5% Urea solvent and black liquor solvent in which the ratio of solvent and bark powder of 1: 5. The result of extraction yielded the varied average value which of 9,650%; 16,543%; 9,675% and 28,137% respectively with the average value of solid content of 2,75%; 5,642%; 3,399% and 9,869% respectively.
Keywords: bark, Eucalyptus deglupta, extract, tannin
Penulis: Enih Rosamah
Kode Jurnal: jpkehutanandd170202

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