Arsenic determination GFAAS

Al, Mn, Ag, and Zn. It should be noted that in January 2001, the MCL goal for arsenic (As) in drinking water was set at zero. This was a health-based initiative and was not actually enforceable. However, in February 2002, an enforceable MCL of 10 ppb was applied to community and noncommunity water systans, which are not presently subject to arsenic standards. In addition, the EPA Office of Water (www.epa.gov/ow) has stated that all water systems, nationwide, had to be fully compliant by January 2006. This extremely low level means that only ICP-MS or GFAA (under Method 200.9) methods can be used to determine arsenic, because the ICP-OES methodology (inc. Method 200.7) cannot meet the required limits of quantitation. 

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