Titlebook: Industrial Air Pollution Monitoring; Book 1998

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Optical methods of analysis. 1 Infra-red,quent use in industrial air pollution monitoring. This method — particularly the use of non-dispersive infra-red (NDIR) measurements — provides the most robust technique for the continuous monitoring of polluting gases, combining accuracy of result, together with long life of analysers and relatively low maintenance costs.

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Calibration gases,ative, it is necessary to use a calibration gas to calibrate any analysers or sensors on a regular basis. Hence, it is necessary to select the most appropriate calibration gas standard for these determinations bearing in mind any further requirements of accuracy, traceability and stability that may be required by the pollution control authorities.

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,Particulate emissions — optical and other methods for continuous monitoring from a point source,All particles emitted from a stack or vent give rise to various nuisances, depending upon the size, quantity and chemistry of the particles. Plume visibility and haze are a major nuisance resulting mainly from the emission of finer particles, whereas larger particles give rise to local ground level deposits.

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Optical methods of gas analysis. 2 Visible and ultra-violet,Gas analysis by optical methods is a wide-ranging subject with numerous techniques available for the analyst. Choosing a particular method can be a confusing and difficult choice for the inexperienced. The following rules can be applied when investigating the suitability of any given method.

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Electrochemical and other non-optical techniques,th sensitivity to the pollutant gases found in flue gases since the concentrations are generally higher than in ambient factory atmospheres. However, there may be more severe problems of selectivity, resistance to contamination and operational life than would be encountered in industrial hygiene applications.