||Evaluation of Methods Used for the Determination of Acidity in 'Acid Rain' Samples.
Marinenko, G. ;
Koch, W. F. ;
||National Bureau of Standards (NML), Gaithersburg, MD. Center for Analytical Chemistry.;Environmental Research Center, Research Triangle Park, NC.
Volumetric analysis ;
Air pollution ;
Performance evaluation ;
Acid rain ;
Closed loop systems
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Five methods for the determination of acidity of acid solutions of low concentration (down to .00001 mol/kg) were investigated. Four of the methods provide satisfactory results. Method (3), Gran's plot end-point detection using .001 m NaOH titrant, suffers from the inability to control exactly the size of reagent increments, which is essential for this method. Automated titration systems could remedy this deficiency.