Guidelines for Collection and Field Analysis of Ground-Water Samples for Selected Unstable Constituents (Techniques of Water-Resources Investigations of the United States Geological Survey, Book 1: Collection of Water Data by Direct Measurement)

24 pp. CONTENTS: Preface; Abstract; Introduction; General Criteria for Sampling of Ground for Geochemical Studies; Sample Filtration and Acidification; Sampling for Trace Metals Analysis; Field-Analysis Procedures; References Cited.