A rapid and sensitive method for on-site estimation of small amount of carbonate in soils

Shin Ichiro Wada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

I developed a simple, rapid, and sensitive method for the estimation of a small amount of carbonate in soils. An air-tight plastic bag containing soil sample is first evacuated, then tiled with a definite volume of air followed by the addition of 2 mol L−1 HCl via an attached rubber septum by using a plastic syringe. After about 20 min, the CO2 concentration of the air inside of the bag is determined by a CO2-detector tube. The amount of CO2 released from the soil sample is calculated by adding the amount of CO2 in the air-phase and that dissolved in the aqueous phase, the latter of which is calculated with the aid of the Henry’s law and the CO2 concentration of the air in the bag. The method gave quantitative results with standard CaCO3-quartz powder mixtures. The results for fifteen Ap soil samples agreed with those by the microdiffusion method.

Original languageEnglish
Pages (from-to)45-50
Number of pages6
JournalSoil Science and Plant Nutrition
Volume43
Issue number1
DOIs
Publication statusPublished - Mar 1 1997

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Plant Science

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