Determination of formic acid vapour using piezoelectric crystals with 4-ethyl-3-thiosemicarbazide and 2,6-diacetylpyridine coatings

1. Muñoz Leyva, J.A.
2. De Hidalgo Hidalgo Cisneros, J.L.
3. García Gómez De Barreda, D.
4. Fraidías Becerra, A.J.