Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (8): 939-944.DOI: 10.11944/j.issn.1000-0518.2016.08.150374

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Synthesis and Properties of Stable Isotope Deuterium Labeled D4-Rhodamine B

WANG Haoranab,YANG Weichengbc,TU Yahuib,YANG Chaob,FANG Chaob,LI Meihuabc,LUO Yongbc*(),WU Fanhonga   

  1. a School of Chemical and Environmental Engineering, Shanghai Institute of Technology,Shanghai 201418,China
    b Shanghai Research Institute of Chemical Industry,Shanghai 200062,China
    c National Isotope Engineering Technology Research Center-Shanghai Sub-Center,Shanghai 200062,China
  • Received:2015-10-21 Accepted:2016-04-25 Published:2016-07-21 Online:2016-07-21
  • Contact: LUO Yong
  • Supported by:
    Supported by the Funds for the National Science-Technology Support Plan Projects(No.2015BAK45B01-20)

Abstract:

This paper presents an efficient synthesis of stable isotope labeled D4-rhodamine B from deuterated orthoxylene through oxidation and its reaction with 3-diethylaminophenol in 36.9% total yield. The deuterated product was confirmed by mass spectrometry(MS) and nuclear magnetic resonance(NMR). Its chemical purity is higher than 98.0% by high performance liquid chromatography(HPLC), and isotopic enrichment is higher than 98.0%(atom D). D4-rhodamine B was used as internal standard for the determination of rhodamine B in orange juice with linear calibration curve of 0.05~50 mg/L, limit for determination of 5 μg/kg, recovery of 96.4%~103.4% and relative standard deviation(RSD) of 1.0%~1.2%. This method is proved to be accurate and sensitive for the determination of rhodamine in food safety.

Key words: stable isotope-labeling, D4-rhodamine B, synthesis, internal standard, food safety