Revision History for Techniques and Methods 10-C4 Kinga Révész, Haiping Qi, and Tyler B. Coplen Determination of the d34S of Total Sulfur in Solids; RSIL Lab Code 1800 ----------------------------------------------------- Posted Version 1.0 online 2006 ----------------------------------------------------- Revised and reposted Version 1.1 online 2007 ----------------------------------------------------- Revised and reposted August 3, 2012 "d(34S/32S)" was replaced by "d14Sto" in the title to be in accordance with recommendations of the Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry. Tyler B. Coplen was added as a coauthor. Summary of Procedure and Labware, instrumentation, and reagents text was updated to reflect new instrumentation. Reporting units and operational range text was updated to reflect expression of delta values with number ratios. Sample collection, preparation, analysis aretention times and disposal text was Updated to reflect that samples are no longer submitted through the National Water Quality Laboratory (NWQL) and to document improved analytical techniques. Data acquisition, processing, evaluation, quality control, and quality assurance text waS Updated to reflect that samples are no longer submitted through the National Water Quality Laboratory (NWQL). Three references were added to the References cited section. Appendix A and Appendix N were updated to reflect that samples are no longer submitted through the National Water Quality Laboratory (NWQL). Main text footer was removed from the document.