Analysis of Indian blue ballpoint pen inks tagged with rare-earth thenoyltrifluoroacetonates by inductively coupled plasma–mass spectrometry and instrumental.

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Analysis of Indian blue ballpoint pen inks tagged with rare-earth thenoyltrifluoroacetonates by inductively coupled plasma–mass spectrometry and instrumental neutron activation analysis  S.D. Maind, S.A. Kumar, N. Chattopadhyay, Ch. Gandhi, M. Sudersanan  Forensic Science International  Volume 159, Issue 1, Pages 32-42 (May 2006) DOI: 10.1016/j.forsciint.2005.05.037 Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 1 (a) Chemical structure of 2-thenoyltrifluoroacetone. (b) Chemical structure of rare-earth thenoyltrifluoroacetonate dihydrate chelates (where Ln: La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu). Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 2 Typical IR spectrum of europium thenoyltrifluoroacetonate dihydrate chelate. Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 3 Typical mass spectrum of the acid digested ink sample. Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 4 Typical mass spectrum of the acid digested ink sample tagged with europium thenoyltrifluoroacetonate dihydrate chelate. Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 5 Typical gamma ray spectrum of the neutron activated ink sample. Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions

Fig. 6 Typical gamma ray spectrum of the neutron activated ink sample tagged with europium thenoyltrifluoroacetonate dihydrate chelate. Forensic Science International 2006 159, 32-42DOI: (10.1016/j.forsciint.2005.05.037) Copyright © 2005 Elsevier Ireland Ltd Terms and Conditions