METHOD FOR CALCULATING CONTENT OF COMPONENT WITH LOWER BOILING POINT THAN N-HEXADECANE IN SAMPLE SOIL, AND METHOD FOR CALCULATING INTENSITY OF OIL ODOR USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for vaporizing components with lower boiling point than n-hexadecane contained in sample soil and calculating a content thereof from an amount of carbon dioxide produced by complete combustion thereof, and also to provide a method for calculating an intensity of oil odor in soil from a resultant measured value.;SOLUTION: As shown in Fig.1, this method includes the step of: charging the sample soil containing petroleum-based hydrocarbon into a sample chamber 3 in a vaporization section 1 provided with the sample chamber 3 inside a first heating furnace 2; introducing a mixed gas of oxygen and nitrogen into the sample chamber through an introduction passage and vaporizing the components with lower boiling point than n-hexadecane by heating at a temperature where major oil odor components in the sample soil are vaporized; combusting vaporized components by feeding the mixed gas containing the vaporized components into a reaction section formed by charging an oxidation catalyst into a second heating furnace 10 through an exhaust passage; and measuring an amount of carbon dioxide produced thereby to calculate the content of the vaporized components contained in the sample soil, based on a measured value. A correlation diagram of the calculated measured content and the content of the components with lower boiling point than n-hexadecane contained in the sample soil calculated by a gas chromatography quantitative analysis method, is prepared, and the intensity of oil odor of the sample soil is calculated based on the content of the vaporized components contained in the sample soil measured from the measured amount of carbon dioxide, based on this correlation diagram.;COPYRIGHT: (C)2010,JPO&INPIT