We identify each Henry coefficient H ZIF,gas using experimentally- Non-injectivity of the sensor array in the gaseous environment. The linear transformation in eqn. 17, m = Hp, is non-injective, meaning multiple gas compositions map to an identical sensor array response vector. Consequently, we cannot uniquely determine the ternary gas composition from the response of the two-sensor array . While this non-injectivity could be resolved by adding an additional sensor, we elected to consider non-injectivity as a source of undetected anomalies.