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Clinical Chemistry|January 1, 1982
Liquid-chromatographic determination of ethylene glycol in plasmaR N Gupta, F Eng, M L GuptaClinical Chemistry|July 1, 1979
Gas-chromatographic analysis for valproic acid as phenacyl estersR N Gupta, F Eng, M L GuptaClinical Biochemistry|April 1, 1983
Determination of tricyclic antidepressant drugs by gas chromatography with the use of a capillary columnR N Gupta, M Stefanec, F EngClinical Biochemistry|April 1, 1978
Estimation of theophylline in plasma by thin-layer chromatographyR N Gupta, F Eng, M StefanecClinical Chemistry|August 1, 1982
Liquid-chromatographic determination of pentobarbital in plasma with use of a resin column and an alkaline mobile phaseR N Gupta, P T Smith, F EngClinical Chemistry|October 1, 1977
Estimation of maprotiline in serum by gas-chromatography, with use of a nitrogen-specific detectorR N Gupta, G Molnar, M L GuptaClinical Biochemistry|October 1, 1976
Estimation of amitriptyline and its metabolites in serum and urine by GLC using nitrogen-specific detectorR N Gupta, G Molnar, R E Hill, et al.Journal of Chromatography. B, Biomedical Applications|November 17, 1995
Column liquid chromatographic determination of clozapine and N-desmethylclozapine in human serum using solid-phase extractionR N GuptaPageof 25