Determination of Metals Emissions From Stationary Sources
The Method 29 determination of metal emissions from hazardous waste incinerators involves a modification of the Method 5 train. The sampling train is the same as a Method 5 particulate train with the addition of up to three impingers to enhance the collection of metals of interest. The impinger train requires the SB-4 impinger case, glass nozzle and probe liner, and a non-metallic union. The method has been validated for the collection of 17 different metals.
A stack sample is withdrawn isokinetically from the source, particulate emissions
are collected in the probe and on a heated filter, and gaseous emissions are then collected in an
aqueous acidic solution of hydrogen peroxide (analyzed for all metals including Hg) and an
aqueous acidic solution of potassium permanganate (analyzed only for Hg). The recovered
samples are digested, and appropriate fractions are analyzed for Hg by cold vapor atomic
absorption spectroscopy (CVAAS) and for Sb, As, Ba, Be, Cd, Cr, Co, Cu, Pb, Mn, Ni, P, Se,
Ag, Tl, and Zn by inductively coupled argon plasma emission spectroscopy (ICAP) or atomic
absorption spectroscopy (AAS). Graphite furnace atomic absorption spectroscopy (GFAAS) is
used for analysis of Sb, As, Cd, Co, Pb, Se, and Tl if these elements require greater analytical
sensitivity than can be obtained by ICAP. If one so chooses, AAS may be used for analysis of all
listed metals if the resulting in-stack method detection limits meet the goal of the testing
program. Similarly, inductively coupled plasma-mass spectroscopy (ICP-MS) may be used for
analysis of Sb, As, Ba, Be, Cd, Cr, Co, Cu, Pb, Mn, Ni, Ag, Tl and Zn.
For more information and documents about Method 29, please consult the EPA's Method 29 webpage.
Apex Instruments offers a Method 29 Sampling System. If interested in Method 29 sampling, Apex Instruments works with our customers to make sure we are providing the correct products for your project and will provide you with a price quote. For any questions about our sampling system, please contact sales@apexinst.com.