In
this work, we developed a rapid and high-sensitivity method
for simultaneous analyses of fatty alcohols, fatty aldehydes, and
sterols by combining the optimized derivatization reaction with electrospray
ionization-ion mobility-mass spectrometry (ESI-IM-MS). Pyridine and
thionyl chloride were used as derivatization reagents as they were
easily removed after the derivatization reaction and could generate
permanently charged tags on different functional groups including
hydroxyls and aldehydes. Through this one-step derivatization reaction,
the sensitivity of detection for fatty alcohols, fatty aldehydes,
and sterols was significantly increased. Moreover, the introduction
of ion mobility spectrometry (IMS), offering an additional resolution
power, ensured more sensitive and accurate detection of derivative
products without increasing analytical time. Being connected with
high-performance liquid chromatography, more than 15 kinds of compounds
were analyzed within 4 min. Relative quantification using peak intensity
ratios between d
0-/d
5-labeled ions were subsequently applied for analyzing these
15 kinds of compounds in human thyroid carcinoma and para-carcinoma
tissues. The results showed significant differences in content of
some analytes between these two kinds of tissues (p < 0.05). The correlations between most of the analytes in thyroid
carcinoma tissues are better than the correlations in para-carcinoma
tissues.
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