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This article in SSSAJ

  1. Vol. 48 No. 6, p. 1236-1239
     
    Received: Apr 20, 1983
    Published: Nov, 1984


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doi:10.2136/sssaj1984.03615995004800060006x

An Automated Manometric Method for Quantitative Determination of Calcite and Dolomite1

  1. V. P. Evangelou,
  2. L. D. Whittig and
  3. K. K. Tanji2

Abstract

Abstract

A rapid automated method is described for differentiation and quantitative determination of calcite and dolomite in earth materials. The method is based on differential pseudo-first-order kinetic rates of dissolution of the two carbonate species when reacted with excess of 5M HCl. The method employs manometric measurement of acid-liberated CO2 with a differential pressure transducer coupled to a strip chart recorder. Tested on calcite and dolomite singly and together in geologic materials, the method is highly discriminatory, highly sensitive, and extremely rapid. Theoretical treatments of pseudo-first-order kinetic reactions and of manometric measurements associated with the method are reviewed.

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