Simultaneous mercury and tin speciation in environmental samples by GC-MIP/AES after preconcentration by solid phase microextraction A. Delgado, J. Sanz, R. Carrera, O. Zuloaga, A. de Diego et J.M. Madariaga J. Phys. IV France, 107 (2003) 1423 DOI: 10.1051/jp4:20030571