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.