I developed of device for detection of cyanide gas. For detection of cyanide gas prototype portable and can be analyzed at real locations.
Cloth is the main material for fabrication simple, lightweight and low cost since no special equipment is required.
Wax dipping method was use to fabricating cloth bases devices.
I can detected cyanide gas from smoke and sample of cassava, by observing the color of vitamin B12 solution changed from light red to purple color after come across cyanide gas.