Ontario-Hydro (Method ASTM D6784-02) System
Ontario-Hydro (Method ASTM D6784-02) System
In the Ontario-Hydro Method (ASTM D6784-02) a sample is withdrawn from the flue gas stream isokinetically through the probe/filter system, maintained at 120ºC (250ºF) or the flue gas temperature (whichever is greater), and is passed through a series of impingers in an ice bath.
Product Documents
Description
Particle-bound mercury is collected in the front half of the sampling train. Oxidized mercury is collected in impingers containing a chilled aqueous potassium chloride solution. Elemental mercury is collected in subsequent impingers (one impinger containing chilled aqueous acidic solution of hydrogen peroxide and three impingers containing chilled aqueous solutions of potassium permanganate). Samples are recovered, digested, and then analyzed for mercury using cold-vapor atomic absorption (CVAAS) or fluorescence spectroscopy (CVAFS). The scope of the method applies to the determination of elemental, oxidized, particle-bound and total mercury emissions from coal-fired stationary sources with concentrations ranging from approximately .05 to 100 μg/dscm. The sample train configuration is similar to EPA Method 5.
Ontario-Hydro Recommended Accessories
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Stainless steel ball joint clamp (generic, #28) |
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3-inch (82.6 mm) quartz fiber filters, Pallflex brand, 25… |
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U-tube, #28 unground sockets |
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Impinger assembly, plain stem, 500 mL, unground O-ring Joints, modified… |
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Impinger assembly, stem with orifice and plate, 500 mL, unground… |
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PFA nozzle brush, 1/2-inch diameter, PFA barrel and bristles |
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Small glass nozzle set (sizes 4-10) |
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5/8-inch glass-filled PFA/PTFE union complete with nuts and ferrules |
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PTFE probe brush tip (PTFE barrel and PTFE bristles), 5/8-inch… |
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10-foot flexible PTFE probe brush extension (brush not included) |
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Apex Instruments impinger cases are constructed from thick aluminum to… |
