| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for measuring an amount of ammonia produced from urea concentration and ammonium formate concentration, in a mixed solution of an aqueous urea solution and an aqueous ammonium formate solution. SOLUTION: The method and apparatus for measuring an amount of ammonia generated from a sample solution which is an aqueous urea solution, an aqueous ammonium formate solution, or an aqueous mixture thereof, includes applying a pulse voltage to a heating element for a predetermined time to heat the sample solution using the heating element; measuring a thermal conductivity dependent output value and a kinetic viscosity dependent output value that are electrical outputs dependent on the electrical resistivity of the temperature-sensitive element; calculating a urea concentration X wt.% and an ammonium formate concentration Y wt.%, in the sample solution from a relation between the thermal conductivity dependent output value and the kinetic viscosity dependent output value; calculating a urea amount A and an ammonium formate amount B in the sample solution from their concentrations and an amount of the sample solution; and determining the amount of generated ammonia with data thus obtained. COPYRIGHT: (C)2008,JPO&INPIT
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