| 摘要 |
A method for determining the concentration of a target gas in an environment which utilises a metal oxide gas sensor having a sensitivity to a background stimulus present in the environment, said sensitivity being variable according to the concentration of the target gas, comprises the following steps: (1) calibrating the sensitivity of the first sensor to the background stimulus as a function of the concentration of the target gas; (2) determining a change in the sensitivity of the first sensor to the background stimulus in the environment, caused by the presence of the target gas in the environment; and (3) using the change in sensitivity to the background stimulus determined in step (2) and the step of calibrating the sensitivity of the first sensor in step (1) to determine the concentration of the target gas in the environment.
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