Standard Reference Materials

Abstract

In general, much more detail will be found in these papers than is generally allowed, or desirable, in scientific journal articles. This enables the user to assess the validity and accuracy of the measurement processes employed, to judge the statistical analysis, and to learn details of techniques and methods utilized for work entailing the greatest care and accuracy.It is also' hoped that these papers will provide sufficient additional information not found on the certificate so that new applications in diverse fields not foreseen at the time the SRM was originally issued will be sought and found. Paints scraped from the interior surfaces of old housing were collected, blended, homogenized, and characterized for lead content. The average lead concentration was found to be 11.87 percent +0.04 percent lead by weight determined by atomic absorption spectrometry and by differential cathode-ray polarography The analytical procedures involved sample dry ashing in a furnace at 450-550°C followed by exhaustive extractions of the insoluble residue with acids and with ammonium acetate solution.

Ferrous metallurgy

“…Other Methods. Polarography (335), thin layer chromatography (96), and Auger spectroscopy (87) have been applied to the determination of aluminum.…”

“…Polarography. Two methods of interest have been published (335,508) covering the polarographic analysis of steel for antimony.…”

“…Electrochemical. Stripping voltammetry (253) and differential cathode-ray polarography (335) have been applied to iron and steel analyses for bismuth. Spectrophotometric.…”

“…Electrochemical. Cast iron has been analyzed by cathode-ray polarography (335) and steel by amperometry with 2,4-dithiobiuret (499), or by an indirect iodometric method (255). Neutron Activation.…”