Methods 7, 7A and 7B are variations of the non-isokinetic nitrogen oxide determination method that provide for three different analytical procedures of a grab sample that are collected in an evacuated 2 liter flask containing a dilute solution of sulfuric acid and hydrogen peroxide.
Environmental Supply's M7-S1 Method 7 Sampling System consists of a heated Pyrex lined probe assembly, a sample caddy, multiple evacuation flasks, a 3-way Pyrex valve, a hand purge pump, an evacuation pump, a 3-way pump selection valve, and digital manometer pressure sensor. Specifically within M7-S1 are the following component pieces:
Qty. Part # Description
1 PRAM-P03-06 Heated 3' Probe Assembly, 3/8" With Cup
2 PRLM-P03-06 Pyrex 3' Liner, 3/8" With Cup
1 GPA-B12-06GL Pyrex Adapter With #12 Ball Joint and 3/8" Cap
1 M6-SC Support Caddy
6 GP-701 3 Way Valve (5 extra valves)
6 GP-702 Encased Flask (5 extra flasks)
1 #PM:SKNU-14 90° 3/4" Tube Adapter
1 PPM-477-5 Digital Manometer, 0-30 psid
1 M7 Valve M7 Valve Flow Control Assembly
1 M7 Pump Method 7 Pump Assembly
1 M5-DC-1 Single Stage Digital Temperature Controller
1 GPA-S12-04GL #12 Socket Pyrex Adapter With 1/4" Cap
2 GP-611 #12 Pinch Clamps
Methods 7C and 7D provide for nitrogen oxide determination by drawing a low flow (0.4 - 0.5 liter per minute) sample through a heated, Pyrex-lined probe assembly and an arrangement of three standard size orifice impingers containing an alkaline-potassium permanganate solution and a dryer impinger. Environmental Supply's M7-S2 Sampler includes the probe assembly, a complete glassware set, an insulated impinger box with probe support panel and an outlet impinger adapter with thermocouple. The UNI-VOS-ACD low flow console is the ideal control console to complete the system.
EPA Method 7: Determination of Nitrogen Oxide Emissions from Stationary Sources
Item # M7-S1
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