This self-contained book provides modern and practical analytical methodologies for the assays in foods, pharmaceuticals and clinical samples. It covers the fat-soluble Vitamins: A, beta-carotene, D, E and K as well as the water soluble vitamins, C, folate, thiamin, biotin, pyridoxin and cyancobalims.

The Annual Beltsville Symposium serves as a forum for presenting recent developments in basic research that contribute solutions to agricultural problems. The eleventh in this series focuses on instrumentation tech­ niques which provide powerful new research tools. These tools will provide information that can lead to a better understanding of biological and physical processes critical to the solution of today's agricultural problems. The tools discussed include isotope technology, separation techniques, microscopy, electro-magnetic spectroscopy, resonance and mass spectrometry and microcomputers. This Symposium brought together scientists who are at the forefront of the development of many of these tools and those who are applying them to problems directly related to agricultural research. WALDEMAR KLASSEN, Director Beltsville Area VII CONTRIBUTORS AND THEIR AFFILIATIONS Norman G. Anderson Youhanna Fares Proteus Technologies, Inc. Phytokinetics Inc. Rockville, MD 20852 College Station, TX 77840 U.S.A. U.S.A. Cherie L. Fisk Edwin D. Becker Office of Research Services Office of Research Services NIH NIH Bethesda, MD 20892 Bethesda, MD 20892 U.S.A. U.S.A. Klaus Biemann John D. Goeschl Phytokinetics, Ltd. Department of Chemistry College Station, TX 77840 Massachusetts Institute of Technology Cambridge, MA 02139 U.S.A. U.S.A. R.J. Griesbach Florist and Nursery Crops Laboratory B.A. Bolton Development Quality Laboratory Horticultural Science Institute Agricultural Research Service USDA Western Regional Research Center Beltsville, MD 20705 Agricultural Research Service USDA U.S.A. Albany, CA 94710 U.S.A.

The Annual Beltsville Symposium serves as a forum for presenting recent developments in basic research that contribute solutions to agricultural problems. The eleventh in this series focuses on instrumentation tech­ niques which provide powerful new research tools. These tools will provide information that can lead to a better understanding of biological and physical processes critical to the solution of today''s agricultural problems. The tools discussed include isotope technology, separation techniques, microscopy, electro-magnetic spectroscopy, resonance and mass spectrometry and microcomputers. This Symposium brought together scientists who are at the forefront of the development of many of these tools and those who are applying them to problems directly related to agricultural research. WALDEMAR KLASSEN, Director Beltsville Area VII CONTRIBUTORS AND THEIR AFFILIATIONS Norman G. Anderson Youhanna Fares Proteus Technologies, Inc. Phytokinetics Inc. Rockville, MD 20852 College Station, TX 77840 U.S.A. U.S.A. Cherie L. Fisk Edwin D. Becker Office of Research Services Office of Research Services NIH NIH Bethesda, MD 20892 Bethesda, MD 20892 U.S.A. U.S.A. Klaus Biemann John D. Goeschl Phytokinetics, Ltd. Department of Chemistry College Station, TX 77840 Massachusetts Institute of Technology Cambridge, MA 02139 U.S.A. U.S.A. R.J. Griesbach Florist and Nursery Crops Laboratory B.A. Bolton Development Quality Laboratory Horticultural Science Institute Agricultural Research Service USDA Western Regional Research Center Beltsville, MD 20705 Agricultural Research Service USDA U.S.A. Albany, CA 94710 U.S.A.

This self-contained book provides modern and practical analytical methodologies for the assays in foods, pharmaceuticals and clinical samples. It covers the fat-soluble Vitamins: A, beta-carotene, D, E and K as well as the water soluble vitamins, C, folate, thiamin, biotin, pyridoxin and cyancobalims.

The Annual Beltsville Symposium serves as a forum for presenting recent developments in basic research that contribute solutions to agricultural problems. The eleventh in this series focuses on instrumentation tech­ niques which provide powerful new research tools. These tools will provide information that can lead to a better understanding of biological and physical processes critical to the solution of today's agricultural problems. The tools discussed include isotope technology, separation techniques, microscopy, electro-magnetic spectroscopy, resonance and mass spectrometry and microcomputers. This Symposium brought together scientists who are at the forefront of the development of many of these tools and those who are applying them to problems directly related to agricultural research. WALDEMAR KLASSEN, Director Beltsville Area VII CONTRIBUTORS AND THEIR AFFILIATIONS Norman G. Anderson Youhanna Fares Proteus Technologies, Inc. Phytokinetics Inc. Rockville, MD 20852 College Station, TX 77840 U.S.A. U.S.A. Cherie L. Fisk Edwin D. Becker Office of Research Services Office of Research Services NIH NIH Bethesda, MD 20892 Bethesda, MD 20892 U.S.A. U.S.A. Klaus Biemann John D. Goeschl Phytokinetics, Ltd. Department of Chemistry College Station, TX 77840 Massachusetts Institute of Technology Cambridge, MA 02139 U.S.A. U.S.A. R.J. Griesbach Florist and Nursery Crops Laboratory B.A. Bolton Development Quality Laboratory Horticultural Science Institute Agricultural Research Service USDA Western Regional Research Center Beltsville, MD 20705 Agricultural Research Service USDA U.S.A. Albany, CA 94710 U.S.A.

The Annual Beltsville Symposium serves as a forum for presenting recent developments in basic research that contribute solutions to agricultural problems. The eleventh in this series focuses on instrumentation tech­ niques which provide powerful new research tools. These tools will provide information that can lead to a better understanding of biological and physical processes critical to the solution of today''s agricultural problems. The tools discussed include isotope technology, separation techniques, microscopy, electro-magnetic spectroscopy, resonance and mass spectrometry and microcomputers. This Symposium brought together scientists who are at the forefront of the development of many of these tools and those who are applying them to problems directly related to agricultural research. WALDEMAR KLASSEN, Director Beltsville Area VII CONTRIBUTORS AND THEIR AFFILIATIONS Norman G. Anderson Youhanna Fares Proteus Technologies, Inc. Phytokinetics Inc. Rockville, MD 20852 College Station, TX 77840 U.S.A. U.S.A. Cherie L. Fisk Edwin D. Becker Office of Research Services Office of Research Services NIH NIH Bethesda, MD 20892 Bethesda, MD 20892 U.S.A. U.S.A. Klaus Biemann John D. Goeschl Phytokinetics, Ltd. Department of Chemistry College Station, TX 77840 Massachusetts Institute of Technology Cambridge, MA 02139 U.S.A. U.S.A. R.J. Griesbach Florist and Nursery Crops Laboratory B.A. Bolton Development Quality Laboratory Horticultural Science Institute Agricultural Research Service USDA Western Regional Research Center Beltsville, MD 20705 Agricultural Research Service USDA U.S.A. Albany, CA 94710 U.S.A.