The contributing authors have been chosen because of their depth of knowledge and experience in air pollution work, and we are confident that this is reflected in a Handbook which will find very wide application wherever air pollution analysis is practised. Roy M. Harrison Roger Perry February 1985 Readers are recommended to follow all the usual laboratory safety pre cautions. While care has been taken to ensure that the information in this book is correct, neither the authors nor the publisher can accept responsibility for any outcome of the application of methods and procedures outlined in this book. Contributors A. Apling BSc, PhD Air Pollution Division Warren Spring Laboratory Gunnels Wood Road Stevenage Hertfordshire SG 1 2BX UK H. W. de Koning DSc Environmental Pollution Division of Environmental Health World Health Organization Geneva Switzerland R. M. Harrison PhD Department of Chemistry University of Essex Wivenhoe Park Colchester C04 3SQ UK P. W. W. Kirk BSc, MSc, PhD, DIC, C Chern, MRSC Department of Civil Engineering Imperial College London SW7 2BU UK J. R. Kramer Professor in Geochemistry Department of Geology McMaster University Hamilton Ontario L8S 4Ml Canada J. N. Lester B. Tech, MSc, DIC, PhD, MIPHE, Department of Civil Engineering Imperial College London SW7 2BU UK xxi xxii Contributors A. E. Mcintyre BSc, PhD, DIC, MIWES Consultants in Environmental Sciences Ltd Yeoman House 63 Croydon Road London SW20 7TW UK D. J."