1. Arsenic Detection Techniques Loveland Tech4good Luke Whitaker / May 27, 2014

2. Arsenic Detection Techniques Environmental Protection Agency (EPA) Standard • On January 22, 2001 the EPA set the standard concentration in drinking water to be 10 µg/L • See Document 40 CFR Parts 9, 141, and 142 • EPA provided a list of four (4) approved analytical techniques for detecting arsenic in drinking water • See Document 40 CFR 141.23 • Reference: http://www.epa.gov/fedrgstr/EPA-WATER/2001/January/Day-22/w1668.htm

3. Arsenic Detection Techniques Environmental Protection Agency (EPA) Standard • In December, 1999, two (2) years prior to changing the concentration limits of arsenic in drinking water, the EPA contracted the Science Applications International Corporation (SAIC) to perform a thorough analysis of industry approved methods to detect arsenic in drinking water. • The document is entitled “Analytical Methods Support Document For Arsenic In Drinking Water” and can be found at the following link: http://www.epa.gov/safewater/arsenic/pdfs/methods.pdf

4. Arsenic Detection Techniques • The table below lists the approved arsenic detection techniques • Reference: http://www.epa.gov/fedrgstr/EPA-WATER/2001/January/Day-22/w1668.htm • The Standard Methods (SM) and American Society for Testing and Materials (ASTM) documents are available for purchase only

5. Arsenic Detection Techniques Environmental Protection Agency (EPA) Standard MDL = method detection limit % Recovery = RSD = Relative standard deviation =

6. Arsenic Detection Techniques • The table below lists the approved arsenic detection techniques • Reference: http://www.epa.gov/safewater/arsenic/pdfs/methods.pdf

7. Arsenic Detection Techniques Inductively Coupled Plasma Mass Spectroscopy (ICP-MS)

8. Arsenic Detection Techniques Atomic Absorption Spectroscopy (AAS)

9. Arsenic Detection Techniques Atomic Absorption Spectroscopy (AAS)

10. Thank you!