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LABORATORY AND FIELD EVALUATIONS OF EXTRANSENSITIVE SULFUR DIXOIDE AND NITROGEN DIOXIDE ANALYZERS FOR ACID DEPOSITION MONITORING
Citation:
Richman, Jr., E., A. Green, R. Wright, AND J.E. Sickles, II. LABORATORY AND FIELD EVALUATIONS OF EXTRANSENSITIVE SULFUR DIXOIDE AND NITROGEN DIOXIDE ANALYZERS FOR ACID DEPOSITION MONITORING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-90/034 (NTIS PB90201062), 1990.
Description:
Studies of environmental acid deposition require monitoring of very low levels of several atmospheric pollutants. arious passive and active samplers have been used to collect integrated atmospheric samples for such studies. ontinuous analyzers offer an advantage because of their capability to provide more detailed information on the diurnal concentration patterns of the pollutants of interest. The U. 5. EPA acquired two continuous N02 analyzer models (CsI 1600 and Scintrex LMA 3) and one $02 analyzer model (TEC0 435) with sufficient sensitivity to be potentially useful in studies of acid deposition. uring the spring of 1988, RTI conducted laboratory and field evaluations of the extrasensltive analyzers. he analyzers' ranges were 0 to 50 ppb for the N02 analyzers and 0 to 10 ppb for the $02 analyzer. In the laboratory evaluation, performance parameters such as precision, limit of detection and interferences were quantitated. n the 31-day field evaluation, zero and span factor drafts and precision were quantltated. he results of the laboratory and field evaluations are given in this report. lthough EPA has not established performance specifications for extrasensitive analyzers, the results of the laboratory and field evaluations suggest that the analyzers, generally, will perform in an acceptable fashion for the intended application. evertheless, several specific areas needing improvement were uncovered in the evaluations.
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LABORATORY AND FIELD EVALUATIONS OF EXTRANSENSITIVE SULFUR DIXOIDE AND NITROGEN DIOXIDE ANALYZERS FOR ACID DEPOSITION MONITORING