ABSTRACT
One either measures the amount of product generated by the transformation or the amount of reactant necessary to achieve the transformation and then relates those values to the amount of analyte in the unknown sample. Such methods have served as the cornerstone of chemical analysis since the beginning of the study of modern chemistry. Continuous flow analyzers are devices in which the analysate is combined with or injected into a flowing stream of transformation reactants. This chapter presents a brief discussion of gas detection tubes, devices that may be used for rapid estimation of levels of toxic gases and vapors in air. Gravimetric precipitation analysis may only be conducted when the solubility of the precipitant in the reaction medium is negligible, when the precipitate is readily separable from the medium, and when its composition is truly representative of the analyte’s composition.
