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Search Results - Laurens, Johannes B.
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Diagnosis of helicobacter pylori infection with the 13C-urea breath test : analysis by means of gas chromatography with mass selective detection
Published 2013Other Authors: “…Laurens, Johannes B.…”
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Applications of extractive-derivatization sample preparation in a clinical toxicology laboratory setting
Published 2013Other Authors: “…Laurens, Johannes B.…”
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Analysis of Illicit Compounds by Gas Chromatography-Mass Spectrometry in Wastewater
Published 2015Other Authors: “…Laurens, Johannes B.…”
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Blood alcohol : forensic analysis by GC-MS and investigation of some pre-analytical factors that may influence the result
Published 2018Other Authors: “…Laurens, Johannes B.…”
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Qualitative and quantitative gas chromatography-mass spectrometry analysis of the principal toxic constituents of some South African plants in human biological fluid
Published 2021Other Authors: “…Laurens, Johannes B.…”
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The analysis of delta-9-tetrahydrocannabinol, cannabidiol and cannabinol in oral fluid and selected commercial products by gas chromatography-mass spectrometry
Published 2022Other Authors: “…Laurens, Johannes B.…”
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