Method and apparatus for measuring odorant concentration and oderant adding system
AssigneeOsaka Gas Co., Ltd.
InventorsTakayuki Shimokawatoko, Koichi Sumida, Hirofumi Ueda
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Abstract
A method, an apparatus, and an integrated system using the apparatus for measuring a concentration of odorant in odorized gas which is produced by adding the odorant to un-odorized gas comprised mainly of hydrocarbon gas. In a detection absorbance measuring step, there is obtaining detection odorized gas absorbance which is absorbance of the odorized gas relative to a detecting ultraviolet light having high absorbability to the odorant and low absorbability to the un-odorized gas. In a subsequent concentration deriving step, the odorant concentration in the odorized gas is derived from the detection odorized gas absorbance.
Claims14
A method of measuring a concentration of odorant in odorized gas which is produced by adding the odorant to un-odorized gas comprised mainly of hydrocarbon gas, which comprises:
- a detection absorbance measuring step for obtaining, detection odorized gas absorbance which is absorbance of the odorized gas relative to a detecting ultraviolet light having high absorbability to the odorant and low absorbability to the un-odorized gas;
- and
- a concentration deriving step for deriving the odorant concentration in the odorized gas by using the detection odorized gas absorbance;
- wherein said detecting ultraviolet light includes a first specific ultraviolet light having a wavelength selected from the group consisting of 196 nm, 204 nm, and 209 nm and a half bandwidth of between 0.5 to 3 nm.
An apparatus for measuring a concentration of odorant in odorized gas which is produced by adding the odorant to un-odorized gas comprised mainly of hydrocarbon gas, the apparatus comprising:
- an absorbance measuring mechanism for obtaining a detection odorized gas absorbance which is absorbance of the odorized gas relative to a detecting ultraviolet light having high absorbability to the odorant and low absorbability to the un-odorized gas;
- and
- a concentration deriving means for deriving the odorant concentration in the odorized gas by using the detection odorized gas absorbance;
- wherein said detecting ultraviolet light includes a first specific ultraviolet light having a wavelength selected from the group consisting of 196 nm, 204 nm, and 209 nm and a half bandwidth of between 0.5 to 3 nm.
Dependencies are inferred from the claim text.