![]() ![]() These routine and advanced qualitative and quantitative NMR technique utilized here provide a fast, effective and feasible method for the identification of complex mixtures in FTW, which might be a powerful and fast alternative to gas chromatography or high performance liquid chromatography for FTW research. Moreover, the quantitative 1H NMR (qNMR) was further used to quantify the components of the sample. The SelTOCSY technique is used as a supporting method in the cases where the DOSY technique cannot clearly distinguish overlapped signals. If not, adjust D20 () or P30 () until they are. All NMR data were processed using MestReNova 11.0.4 software. Compare the two spectra: mdisp then re n, where n is the expno from step 5 (eg, re 3) If the intensity of the second spectrum is roughly 1/50 that of the first, all is good. The NMR results show that the DOSY technique can pseudo-separate most of components in complex mixtures over the diffusion dimension. The DOSY time and gradient pulse were set at 132 ms () and 3 ms () respectively. Herein, various qualitative NMR techniques, especially diffusion-ordered spectroscopy (DOSY) and one dimension (1D) selective gradient total correlation spectroscopy (SelTOCSY) were strategically applied in the analysis of FTW. However, the analysis of Fischer–Tropsch waste water (FTW) is still somewhat underdeveloped and the exact composition of FTW remains unclear. The Fischer–Tropsch (FT) process is a practical approach to convert synthesis gas (CO and H 2) into hydrocarbons and oxygenates, and these product mixtures are usually well-characterized. ![]()
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