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Chiral micellar electrokinetic chromatography with laser‐induced fluorescence detection (chiral‐MEKC‐LIF) was used to investigate D‐ and L‐amino acid contents in cerebrospinal fluid (CSF) samples related to different Alzheimer disease (AD) stages. CSF samples were taken from (i) control subjects (S1 pool), (ii) subjects showing a mild cognitive impairment who remained stable (S2 pool), (iii) subjects...
In order to improve the sensitivity of CE‐ESI‐MS for the analysis of brain‐gut peptides, a solid‐phase extraction combined with field‐amplified sample injection was used for the pre‐concentration of the brain‐gut peptides. Compared with the conventional pressure injection method, the sensitivity in the detection of brain‐gut peptides was improved more than 100‐fold. The possible factors affecting...
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