Detecting Ethylene

Does Mq2 gas sensor can detect ethylene in group of plants? Example if it value is raise to something it will turn on the led.

As per this MQ2 sensor (http://wiki.seeedstudio.com/Grove-Gas_Sensor-MQ2/), ethylene or C2H4 is not mentioned.

Ethylene sensors were discussed recently on here, I remember seeing the word "ethylene" in the titles.

Edit: You can find them here