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- [16] DETERMINATION OF BENZIDINE IN URINE USING CAPILLARY GAS-CHROMATOGRAPHY AND NEGATIVE-ION CHEMICAL-IONIZATION MASS-SPECTROMETRY FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1993, 347 (3-4): : 136 - 140
- [17] DETERMINATION OF CLEBOPRIDE IN PLASMA BY CAPILLARY GAS-CHROMATOGRAPHY NEGATIVE-ION CHEMICAL IONIZATION MASS-SPECTROMETRY JOURNAL OF CHROMATOGRAPHY-BIOMEDICAL APPLICATIONS, 1988, 432 : 153 - 163
- [18] AN ASSAY FOR PARACETAMOL, PRODUCED BY THE ORTHO-DEETHYLATION OF PHENACETIN INVITRO, USING GAS-CHROMATOGRAPHY ELECTRON-CAPTURE NEGATIVE-ION CHEMICAL IONIZATION MASS-SPECTROMETRY BIOMEDICAL AND ENVIRONMENTAL MASS SPECTROMETRY, 1986, 13 (02): : 91 - 93