title: [Studies on the chemical estimation method of industrial environment. (II). Determination of trichloroethylene, chloroform and benzylchloride by pyridine-formalin method].
mesh_terms: D002725:Chloroform / Q000032:analysis*; D005557:Formaldehyde; D009787:Occupational Medicine; D011725:Pyridines; D013053:Spectrophotometry; D014050:Toluene / Q000032:analysis*; D014241:Trichloroethylene / Q000032:analysis*
chemical_list: D011725:Pyridines; D005557:Formaldehyde; D014241:Trichloroethylene; D014050:Toluene; D002725:Chloroform