1 Books Title: Metrology in chemistry and biology: a practical approach Authors: M. Valcárcel et al. EN O.O.P.E.C. Luxemburgo, 1999 70 pages . 2 Title: Principles of Analytical Chemistry Authors: M. Valcárcel. 3 Springer-Verlag, Heildeberg, 2000, 350 pages Title: Automatización y miniaturización en Química Analítica Author: M. Valcárcel and S. Cárdenas 4 Springer Ibérica (Barcelona), 2000 300 pages. Title: Metrology of Qualitative Analysis Authors: M. Valcárcel et al. EN O.O.P.E.C., Luxemburgo, 2003. Aprox. 166 pages 5 Title: Analytical Chemistry (2nd edition) Authors: M. Valcárcel as co-editor and author of 9 chapters Ed. Wiley-VCH (Germany), 2004. 980 pages