تلخیص
Calcite quantification made by the HC1 and H2SO4 methods, using Merck pure calcium carbonate precipitated, indicated that both the methods have serious discrepancies at low levels of carbonate content. In the calcimeter, rise in the mercury level, with each increment of carbonate, was linear with no variation among the replicates. In acetic acid method the relationship of pH of solution in equilibrium with varying amount of CaCC>3 was linear with log[(mg CaCO3)/(500-CaCO3)]. Soil carbonates determined from the standard curve by pH developed by acetic acid were compared with those obtained by the HC1, H2SO4, and calcimeter methods. Generally the methods compared well with the published values. Although, the four methods yielded comparable values for carbonate contents, the acid neutralization methods, HC1, H2SO4, and acetic acid, showed slightly higher values than that of calcimeter method
* M. Mahmood-ul-Hassan, M.S. Akhtar . (1992) CALCITE IN THE SEMI-ARID SOILS OF PAKISTAN I. COMPARISON OF QUANTIFICATION METHODS, The Journal Soil & Environment , Volume 7, Issue (1-2).
-
Views
338 -
Downloads
29