4. Conclusion
The use of the stable isotope-labeled analyte as internal standard
is the best choice in HPLC–MS/MS analysis work. However
the isotope-labeled analytes are not always available and the
synthesis of the isotopic analogues for all analytes is a
time-consuming work. The isotope-coded derivatization reagent
is an alternative solution to this problem, especially when determining
numerous analytes which having a specific functional
group simultaneously. In this work, a global isotope internal standard
quantitative method for seven BAs was established by using
isotope-coded derivatization with d0-/d3-MASC. It revealed three
outstanding merits, namely mild derivatization procedure, isotope
coding for all analytes and rapid HPLC–MS/MS run. The derivatization
of MASC with BAs could be accomplished within 15 min at
55 C. All seven BAs could have its isotopic analogues as internal
standards by differential isotope MASC derivatization. The whole
HPLC–MS/MS run were less than 5 min, which permits rapid and
high throughput analysis. It has also been demonstrated that the
proposed method was successfully applied in the accurate quantification
of BAs from selected Chinese rice wine samples.
Acknowledgments
This work was supported by National Natural Science
Foundation of China (21305076, 21275089), the Natural Science
Foundation of Shandong Province (ZR2012BQ022) and the
Foundation of Qufu Normal University (BSQD20110118).
Appendix A. Supplementary data
Supplementary data associated with this article can be found, in
the online version, at http://dx.doi.org/10.1016/j.foodchem.2015.
07.024.