title: Spectrophotometric determination of organophosphorus pesticides with 4-(4-nitrobenzyl)pyridine.
mesh_terms: D007202:Indicators and Reagents; D007306:Insecticides / Q000032:analysis*; D009578:Nitrobenzenes; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D011725:Pyridines; D013053:Spectrophotometry / Q000379:methods
chemical_list: D007202:Indicators and Reagents; D007306:Insecticides; D009578:Nitrobenzenes; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D011725:Pyridines; C008633:4-(4-nitrobenzyl)pyridine