ASTM Affirms Luminescent Dissolved Oxygen (LDO) Method as Standard for Water Analysis

LOVELAND, COLORADO, June, 2005 – Hach Company has learned that the ASTM International standards development organization has recently affirmed luminescent dissolved oxygen (LDO) methodology as one of three ASTM standard methods for measuring dissolved oxygen in water. After thorough evaluation, the ASTM D19 Committee for water has incorporated the results of the Hach LDO® USEPA inter-laboratory validation study into ASTM Standard D888, Standard Test Method for Dissolved Oxygen in water. The revised standard – now listing the LDO method (Method C) along with traditional Winkler titration (Method A) and electrochemical (membrane) method (Method B) – will be published under Standard D888-05 in the Annual Book of ASTM Standards, Volumes 11.01 and 11.02.

Originally known as the American Society for Testing and Materials (ASTM), ASTM International is trusted by end users in industry, municipalities, and the USEPA for the development of technical standards and practices for materials, products, systems, and services. The organization’s consensus body is representative of manufacturers, users, consumers, government, and academia from more than 100 countries. Incorporation into the ASTM Standard D888 affirms, through technical consensus, the performance of the LDO method for measuring DO concentration in water.

The Hach LDO® Probe, proven repeatedly in the field and laboratory for durability, accuracy, precision, and reduced maintenance, is changing the standard for dissolved oxygen measurement. For more information, to order, or request product literature, visit www.hachenvironmental.com or call 1-800-949-3766 in the U.S.A. Outside the U.S.A., call 1-970-669-3050 ext 6426.