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A Volumetric Inorganic Carbon Analysis System
Author(s) -
Wagner S. W.,
Hanson J. D.,
Olness Alan,
Voorhees W. B.
Publication year - 1998
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1998.03615995006200030021x
Subject(s) - carbon fibers , total inorganic carbon , combustion , process (computing) , analytical chemistry (journal) , chemistry , materials science , mineralogy , environmental science , process engineering , computer science , carbon dioxide , environmental chemistry , engineering , composite material , organic chemistry , composite number , operating system
Measurement of soil organic carbon (OC) is slow and expensive when inorganic carbon (IC) is present. Our objective was to develop an automated volumetric IC analysis system, thus allowing OC to be determined by difference. The system was developed by combining a pressure transducer with a personal computer (PC), data acquisition board, and appropriately developed software. The volumetric system was compared with combustion, neutralization, and sum of Ca + Mg techniques for samples containing up to 60 g kg −1 IC. Correlations between methods showed linear agreement ( r 2 ≥ 0.994). The volumetric system was more precise for relatively low IC amounts (2.0 g kg −1 ) and could process 20 samples h −1 .