The standard offers a reliable procedure for determining aluminum content in all types of water specimens, including natural, potable, and reagent-grade. The method fulfills regulatory needs and operational monitoring requirements in environmental and industrial water systems, specifically when aluminum interferes with biological or chemical operations.
ASTM D857 Test Method
| Sample Acidification | The procedure for dissolved aluminum requires filtering and acidifying the sample to a pH value below 2 using nitric acid at the collection point. |
| Aluminum Detection | The measurement of aluminum concentration occurs by direct atomic absorption through a nitrous oxide-acetylene flame. |
| Apparatus Preparation | The glassware treatment starts with soaking it in hot hydrochloric acid solution (1:1) for two hours, followed by repeated water rinses before finishing with alcohol washes of methanol or isopropanol. |