A series of chapters on techniques describes methods used by the U.S. Geological Survey for planning and conducting water-resources investigations. The material is arranged under major subject headings called books and is further subdivided into sections and chapters. Book 5 is on laboratory analyses; section A is on water. The unit of publication, the chapter, is limited to a narrow field of subject matter. "Methods for Determination of Inorganic Substances in Water and Fluvial Sediments" is the first chapter under section A of book 5. The chapter number includes the letter of the section.This chapter was prepared with the assistance of many chemists and hydrolo gists of the U.S. Geological Survey as a means of documenting and making available the methods used by the U.S. Geological Survey to analyze water, water-sediment mixtures, and sediment samples.Any use of trade names, commercial products, manufacturers, or distributors is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey.This chapter supersedes "Methods for Determination of Inorganic Substances in Water and Fluvial Sediments" by M.

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All inorganic and organic methods for analyzing samples of water and fluvial sediment, which have been approved for use by the U.S. Geological Survey from 1954 to the present (1994), are listed. Descriptive method names include references to published reports for easy retrieval of methodology. The year each method was approved is listed as well as the year the method was discontinued. Inorganic and organic methods are listed separately by sample type (dissolved, whole water, bottom material, suspended sediment, or fish tissue) and by mode of analysis (manual or automated, or both). mation provided in this Open-File Report. In addition, the years of start-up and discontinued use of a method are listed in both tables. These dates are approximate and may vary by 1 or 2 years for many of the older methods. However, all new methodology published in the Open-File Report series gives both the month and year of start-up. Methods are listed in alphabetical order in table 1 and in numerical order in table 2. In both tables, the Abstract inorganic methods are listed first and then followed by deleted in favor of listing only those methods in use in the organic methods. The data base for both tables was 1994. The information also could be sorted by analytcreated using Ingres software, which makes it easy to ical technique. To meet these needs, the data base can manipulate the information to serve the needs of most be shared electronically by contacting the chief of the users. For example, discontinued methods could be Laboratory Operations Program at NWQL.

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