TY - JOUR
T1 - A rapid and sensitive method for on-site estimation of small amount of carbonate in soils
AU - Wada, Shin Ichiro
N1 - Funding Information:
Acknowledgments. I thank Dr. Kubo, Kumamoto Agricultural Research Center, Mr. Kaneko and Mr. Odahara, Fukuoka Agricultural Experimental Station for their assistance in sampling soils. I also thank Komyo Rikagaku Kogyo Co. Ltd. for supplying technical information about carbon dioxide detector tubes. This study was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan (No. 06453163).
PY - 1997/3/1
Y1 - 1997/3/1
N2 - 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.
AB - 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.
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U2 - 10.1080/00380768.1997.10414713
DO - 10.1080/00380768.1997.10414713
M3 - Article
AN - SCOPUS:0030984805
SN - 0038-0768
VL - 43
SP - 45
EP - 50
JO - Soil Science and Plant Nutrition
JF - Soil Science and Plant Nutrition
IS - 1
ER -