SRM 2950a Respirable Alpha Quartz on Filter Media (Nominal Mass of Alpha Quartz: 5 µg to 500 µg) - This Standard Reference Material (SRM) is intended primarily for the calibration of X-ray diffraction (XRD) spectrometers for the determination of respirable alpha quartz using National Institute for Occupational Safety and Health (NIOSH) Method 7500, or the equivalent. This data is public in the Certificate of Analysis for this material.

SRM 2973 Vitamin D Metabolites in Frozen Human Serum (High Level) - This Standard Reference Material (SRM) is intended for use as an accuracy control in the critical evaluation of methods for determining the amount-of-substance concentration of vitamin D metabolites in human serum. This SRM can also be used as a quality assurance tool for assigning values to in-house control materials for these constituents. This data is public in the Certificate of Analysis for this material.

This Standard Reference Material (SRM) is intended for use as a primary calibration standard for the quantitative determination of aluminum. A unit of SRM 3101a consists of five 10 mL sealed borosilicate glass ampoules of an acidified aqueous solution prepared gravimetrically to contain a known mass fraction of aluminum. The solution contains nitric acid at a volume fraction of approximately 10 %, equivalent to an amount of substance concentration (molarity) of approximately 1.6 mol/L. This data is public in the Certificate of Analysis for this material.

This Standard Reference Material (SRM) is intended for use as a primary calibration standard for the quantitative determination of antimony. A unit of SRM 3102a consists of 50 mL of an acidified aqueous solution prepared gravimetrically to contain a known mass fraction of antimony in a high-density polyethylene bottle sealed in an aluminized bag.

BEA has an updated interactive data application to make it easier to access and use our statistics. The application provides a common look and feel for users accessing national, international, regional or industry statistics; makes the data easier to print, save and export; makes the charting features more robust and visually appealing; and makes the data easier to share with others via a variety of tools.

BEA's national economic accounts provide a comprehensive picture of the U.S. economy and feature many macroeconomic statistics. The NIPA tables provide data for domestic product and income, government receipts and expenditures, foreign transactions, saving and investment, and employment by industry.

BEA's fixed assets accounts include a wide array of statistics on both fixed assets, which are used continuously in processes of production for an extended period of time, and consumer durables, which are generally defined as tangible products that can be stored or inventoried and that have an average life of at least three years.

BEA's International Transactions (Balance of Payments) accounts include all transactions between U.S. and foreign residents.

These tables present trade in services and services supplied by affiliates of multinational enterprises.

A balance sheet of U.S. financial assets and liabilities with residents of other countries.