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网页2022年7月19日 · Optimal derivatization conditions were established for the simultaneous determination of 12 aliphatic saturated aldehydes, 8 aliphatic saturated ketones, 4 cyclic ketones, 3 branched aldehydes, 1 branched ketone, 10 aliphatic unsaturated carbonyl compounds, 9 aromatic aldehydes, 4 dialdehydes and 5 diketones with 2,2,2-trifluoroethyl

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网页2020年9月30日 · Chromatography is a separation technique that allows scientists to analyze complex mixtures and is often used in research and clinical labs. A few of the common techniques include gas chromatography (GC) and high-performance liquid chromatography (HPLC). Many consumables are required for chromatography testing

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网页Learn more about our gas chromatography solutions. Our GC solutions include gas chromatographs, injectors, detectors, columns, autosamplers, and software to enable you to achieve success with your gas chromatography analyses. Step 1 GC Autosamplers. Step 2 GC Injectors. Step 3 GC Detectors.

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网页2021年8月31日 · In gas chromatography, usually, three types of gases are employed namely –. Carrier gas – This is needed for the transfer of the injected sample to the separation column. They are also responsible for the subsequent transfer of separated components to the detector. Common examples: Nitrogen, helium, or hydrogen.

网页2022年2月22日 · Multiple headspace extraction (MHE) gas chromatography (GC) for the analysis of residual volatiles and semi-volatiles in insoluble sample types. Multiple headspace extraction gas chromatography (MHE GC) is an analytical technique that is used to calibrate a headspace GC system where all other ‘normal’ approaches have failed.

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网页2019年2月21日 · These methods include high performance liquid chromatography (HPLC), headspace gas chromatography-vacuum ultraviolet spectroscopy (HS-GC-VUV), and hea The ability of different methods to analyze formaldehyde and other leachates from proppants was investigated under lab-simulated downhole conditions.