Flame IonizationPerchloratesChromatography, GasFlame RetardantsOils, VolatileGas Chromatography-Mass SpectrometryAlkanesSodium CompoundsSpectrometry, Mass, Electrospray IonizationCalibrationRhodocyclaceaeHalogenated Diphenyl EthersReproducibility of ResultsPolybrominated BiphenylsIodidesHydrocarbons, BrominatedAir IonizationWater Pollutants, ChemicalSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationThyroid GlandIodine