Diclofenac in municipal wastewater treatment plant: quantification using laser diode thermal desorption—atmospheric pressure chemical ionization—tandem mass spectrometry approach in comparison with an established liquid chromatography-electrospray ionization–tandem mass spectrometry method

•LDTD method for rapid analysis of diclofenac in wastewater and sludge was developed.•The method provides accurate results in 12s in comparison with LC approach.•ASE and USE were tested for the extraction of diclofenac from sludge.•The fate of diclofenac in wastewater treatment plant was studied.•LD...

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