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A SIMPLE AND INEXPENSIVE MODIFICATION OF A FINNIGAN-3300 QUADRUPOLE MASS-SPECTROMETER FOR NEGATIVE-ION DETECTION
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CHARACTERISATION OF PYRROLIZIDINE ALKALOIDS BY GAS THIN-LAYER AND PAPER CHROMATOGRAPHY
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DIRECT QUANTITATIVE-ANALYSIS OF INDICINE-N-OXIDE IN CANCER-PATIENT SAMPLES BY GAS-CHROMATOGRAPHY USING THE INTERNAL STANDARD HELIOTRINE-N-OXIDE INCLUDING A MASS-SPECTRAL COMPARISON OF THEIR TRIMETHYLSILYL DERIVATIVES
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GAS-CHROMATOGRAPHIC MASS-SPECTROMETRIC ANALYSIS OF THE NEW ANTI-TUMOR DRUG INDICINE-N-OXIDE UTILIZING A NOVEL REACTION ACCOMPANYING TRIMETHYLSILYLATION
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