Swedish Pulp and Paper Research Institute

STFI, Swedish Pulp and Paper Research Institute, S-114 86 Stockholm,... 

For quantification purposes it is convenient to use a synthetic mixture containing the methyl esters of the major acids together with the internal standard At the Swedish Pulp and Paper Research Institute, major methyl esters 1, 2, 3, 4, 7 (Fig 6 3 2) have been used with the amounts of each individual component chosen so that the detector response is of the same order of magnitude as that obtained from the lignin samples (One ml of the mixture typically contains approximately 600, 9400, 2400, 2000, and 1900/ig of I, 2, 3, 4, and 7, respectively, and 2400pg of internal standard ) For other major acids present in the product mixture, e g, those corresponding to 5 and 8 and to 6 and 9 (Fig 6 3 2 ), which are from hardwood lignin, it is assumed that the response factors in both cases are similar to those of 4 and 7... 

J. A. Marinsky, T. Miyajima, E. Hdgfeldt, F. G. Lin, and M. Muhammed, Properties of Ionic Polymers-Natural and Synthetic (L. Salmen and M. Htun, eds.), Swedish Pulp and Paper Research Institute, Stockholm, Sweden, 1991, p.7. 

Olof B. Dahlman, Anna Jacobs, and Maria Nordstrom Swedish Pulp and Paper Research Institute, STFI, Box 5604, S-114 06, Stockholm, Sweden... 

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