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Studies on the Aggregation-Induced Synchronous Emission of 1,8-Naphthalimide Derivative to Casein and Its Analytic Application

Abstract

A novel water-soluble 1,8-naphthalimide probe 1, bearing two acetic carboxylic groups, exhibited high selectivity and sensitivity for recognition of casein with the aggregation-induced synchronous emission, based on which, a new casein assay method was developed. This method exhibited a good linear range from 0.1 to 20.0 μg mL−1 and 0.1 to 16.0 μg mL−1, with the correlation coefficient of 0.9975 and 0.9982. The detection limits were estimated to be 4.5 and 6.7 ng mL−1. The proposed method was applied to the determination of casein in milk powder samples and the results were in good agreement with the result of Buiret method.

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Acknowledgments

This study was supported in part from the Doctoral Initiate Foundation of Xi’an University of Arts and Science (90506) and National Scientific Foundation of China (Nos. 81001622).

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Correspondence to Yang Sun or Jun Fan.

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Sun, Y., Liang, X., Zhao, Y. et al. Studies on the Aggregation-Induced Synchronous Emission of 1,8-Naphthalimide Derivative to Casein and Its Analytic Application. Food Anal. Methods 6, 1253–1257 (2013). https://doi.org/10.1007/s12161-012-9530-3

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Keywords

  • 1, 8-Naphthalimide
  • Casein
  • Aggregation-induced synchronous emission (AISE)
  • Analytic application