ADDITIONS AND CORRECTIONS 1981, Volume 16, Page 671
Arthur W. Stelson and John H. Seinfeld* Chemical Mass Accounting of Urban Aerosol. Recently, Dr. James J. Morgan of the California Institute of Technology pointed out an error in this paper. The error occurs in the [HI, [OH], [HI’, and [OH]’ concentrations calculated on the basis of electroneutrality. The original manuscript assumed the sodium is ionic and neglected that the sodium could be present as oxides in solid solutions. In revising the manuscript, the electroneutrality balance was incorrectly adjusted. The correct values are listed in the table below. By reviewing the revised values, Table I. Hydroxyl and Hydrogen Ion Concentration Based on Electroneutrality Balance hydroxyl and hydrogen ion concn, rg m - 3 sample [HI [OH] [HI’ [OH]’ WK 0.3 1.5 WL 0.1 4.1 VJ 0.1 5.7 TC 0.2 5.1 TD 0.1 4.1 TE 0.1 3.7
one can see that the statement on page 677, “Samples Ti: and TD were the only ones that were definitely acidic, whereas WK, WL, VJ, and T E could be basic or acidic”, is incorrect. The change from an acidic to basic prediction based on the electroneutrality balance method indicates the desirability of measuring the hydroxyl or hydrogen ion concentration and the sensitivity of the electroneutrality balance method to the individual ion measurements. Although this error appears in the calculations in Tables 11, VI, VII, and VI11 and Figure 6, the general conclusions are not affected since the numerical values only change slightly.
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Environ. Scl. Technol., Vol. 17, No. 8, 1983
