Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Metals by ICP or AA

Analysis of metals is accomplished using inductively coupled plasma (ICP) or atomic adsorption (AA) instrumentation. Prior to analysis, samples first undergo a digestion process which strips away the matrix, leaving the elemental content in an inorganic acid compatible with the instrumentation. Example US EPA methods include 200.7, 6010, 6020, 7470, 7471, ILM05.4, IO-3.2, and IO-3.4.