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This work shows the lignin content determined as well as its quality (H/G ratio) in wood samples of Pinus caribaea var caribaea from three sites at Pinar del Rio Province, Cuba. The study was carried out at the Tropical Scientific Investigation Institute, Lisbon, Portugal (Project GEMA). The Analytical pyrolysis was used as analytical method. The results represent the average of three repetitions and was obtained similar values to Klason method used as reference. An acceptable correlation was obtained between the Py-lignin contents and Klason lignin for this species. This may be possible to calculate the Klason lignin through the content Py-lignin content. The Analytic pyrolysis is of great utility in the programs of genetic improvement, in which it is necessary the analysis of many samples, since the

Estudio del contenido y la calidad de la lignina mediante Pirólisis analítica en madera de Pinus caribaea