posted on 2024-02-14, 15:35authored byShijuan Zhang, Xueting Wang, Kaiyue Zhang, Keyu Lin, Wenjie Lu, Keke Lu, Yanxin Li
A pair
of positively charged stable isotope labeling (SIL) agents,
(4-carbonochloridoylphenyl)-trimethylazanium iodide (d0-CCPTA) and d6-CCPTA, were
designed and synthesized. These agents were employed in the precolumn
labeling of advanced glycation end products (AGEs) within 5 min under
mild conditions. Through derivatization, the mass spectrometry response
of the AGEs was enhanced by approximately 2 orders of magnitude. The
detection and quantitation limits were in the ranges of 3.1–7.1
and 10.0–23.7 ng/kg, respectively. The recoveries were in the
range of 90.1–94.3%, and the matrix effect ranged from −6.6
to −3.5%. CCPTA produced “CCPTA-specific production
ions”, and all analytes were analyzed by common multiple reaction
monitoring (MRM) parameters. The common MRM parameters were applied
to the semitarget analysis of 41 types of AGE candidates in the absence
of standards, with 13 AGEs identified.