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 NON-VOLATILE ACIDS (Sulfuric Acid and Phosphoric Acid): METHOD 7908, Issue 1, dated 20 May 2014 - Page 5 of 5

[10]	 Furr AK, ed. [1995] CRC Handbook of laboratory safety, 4th ed. Boca Raton, FL: CRC Press. [11]	 ASTM International [2010]. ASTM D4840: Standard guide for sampling chain of custody procedures. West Conshohocken, PA: ASTM International. [12]	 Breuer D, Howe A [2006]. Performance of methods for measurement of exposure to inorganic acids in workplace air. J Environ Monit. 8:120-126. [13]	 Breuer D, Heckmann P, Gusbeth K, Schwab G, Blaskowitz M, Moritz A [2012]. Sulfuric acid at workplaces – applicability of the new indicative occupational exposure limit value (IOELV) to thoracic particles. J Environ Monit. 14:440-445. [14]	 Comité Européen de Normalisation (CEN) [2012]. EN 482, Workplace exposure — General requirements for the performance of procedures for the measurement of chemical agents. Brussels, Belgium: Comité Européen de Normalisation (CEN). METHOD WRITTEN BY: Dietmar Breuer, Dr. rer. nat., Institute for Occupational Safety and Health of the German Social Accident Insurances, Sankt Augustin, Germany; and Kevin Ashley, Ph.D., NIOSH/DART Disclaimer:	 Mention of any company or product does not constitute endorsement by the National Institute for Occupational Safety and Health. In addition, citations to Web sites external to NIOSH do not constitute NIOSH endorsement of the sponsoring organizations or their programs or products. Furthermore, NIOSH is not responsible for the content of these Web sites. All Web addresses referenced in this document were accessible at the time of publication.

NIOSH Manual of Analytical Methods (NMAM), Fifth Edition