U.S. EPA ICP-MS Standard Operating Procedure for FGDW Samples

Draft of U.S. EPA ICP-MS Standard Operating Procedure for FGDW Samples 

This procedure is applicable to the determination of thirteen elements (Al, As, Cd, Cr, Cu, Pb, Mn, Ni, Se, Ag, Tl, V, and Zn) in acid digested FGDW, utilizing a collision/reaction cell to remove molecular interferences and internal standardization to compensate for suppression and enhancement effects caused by sample matrices. Let us take a closer look at this procedure. 

Sample preparation should be carried out as follows A 10-fold dilution of FGDW samples is followed by an open-vessel digestion in a block digester according to U.S. EPA Method 1638, Sections 12.2.1-12.2.7. The final acid concentration of samples, calibration standards, and blank should be approximately 2% HNO3 + 0.5% HCl. 

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