The determination of nitric oxide and nitrogen dioxide in flue gases. Part I. Sampling and colorimetric determination

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Abstract
Methods for the determination of nitric oxide and nitrogen dioxide have been evaluated for the analysis of flue gases from natural gas combustion systems: these methods have been modified where necessary. The study has included both manual and continuous instrumental methods of analysis; manual sampling and colorimetric methods are described here and continuous instrumental methods in Part II (p. 64).