Microchimica Acta

, Volume 171, Issue 3–4, pp 437–440

In vitro monitoring of picogram levels of risperidone in human urine via luminollysozyme flow injection chemiluminescence

Original Paper

DOI: 10.1007/s00604-010-0460-8

Cite this article as:
Chen, D. & Song, Z. Microchim Acta (2010) 171: 437. doi:10.1007/s00604-010-0460-8


The anti-schizophrenic drug risperidone (RSP) exerts an inhibitory effect on the chemiluminescence (CL) of the luminol-lysozyme system. This finding forms the basis for a sensitive flow injection method for its determination at picogram levels. RSP binds to Trp62 in the lysozyme, and this leads to a conformational change upon which the CL of the system is quenched. The decrease in CL is proportional to the logarithm of the concentration of RSP, and the calibration graph is linear in the range from 0.1 pg mL−1 to 1.0 ng mL−1, with relative standard deviations of <5.0%, and a detection limit of 0.05 pg mL−1 (3σ). At a flow rate of 2.0 mL min−1, the whole process including sampling and washing is completed within 20 s. The method was successfully applied to monitoring RSP in human urine after incorporation of 2 mg of RSP, with a total excretion of 16.6% within 8.5 h.


The reaction of lysozyme with risperidone using luminol as luminescence reagent by the luminol-lysozyme FI-CL system and its application.


Risperidone Lysozyme Luminol Chemiluminescence Urine Excretion 

Supplementary material

604_2010_460_MOESM1_ESM.doc (102 kb)
ESM 1(DOC 102 kb)

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Shaanxi Key Laboratory of Analytical Chemistry, Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material ScienceNorthwest UniversityXi’anChina

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