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Raman spectroscopic determination of norbixin and tartrazine in sugar.
Uhlemann U, Strelau KK, Weber K, Da Costa Filho PA, Rösch P, Popp J. Uhlemann U, et al. Among authors: da costa filho pa. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012 Aug;29(8):1244-55. doi: 10.1080/19440049.2012.691556. Epub 2012 Jun 29. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012. PMID: 22742561
Evaluation of Colloids and Activation Agents for Determination of Melamine Using UV-SERS.
Kämmer E, Dörfer T, Csáki A, Schumacher W, Da Costa Filho PA, Tarcea N, Fritzsche W, Rösch P, Schmitt M, Popp J. Kämmer E, et al. Among authors: da costa filho pa. J Phys Chem C Nanomater Interfaces. 2012 Mar 15;116(10):6083-6091. doi: 10.1021/jp211863y. Epub 2012 Feb 14. J Phys Chem C Nanomater Interfaces. 2012. PMID: 22428076 Free PMC article.