1,Multi-element coprecipitation for separation and enrichment of heavy metal ions for their flame atomic absorption spectrometric determinations Journal of Hazardous Materials, Volume 162, Issues 2-3, 15 March 2009, Pages 724-729 Mustafa Tuzen, Mustafa Soylak 2,Simultaneous preconcentration of Co(II), Ni(II), Cu(II), and Cd(II) from environmental samples on Amberlite XAD-2000 column and determination by FAAS Journal of Hazardous Materials, Volume 162, Issue 1, 15 February 2009, Pages 292-299 Celal Duran, Hasan Basri Senturk, Latif Elci, Mustafa Soylak, Mehmet Tufekci 3,Coprecipitation of Ni2+, Cd2+ and Pb2+ for preconcentration in environmental samples prior to flame atomic absorption spectrometric determinations Journal of Hazardous Materials, Volume 159, Issues 2-3, 30 November 2008, Pages 435-439 Mustafa Soylak, Ayse Kars, Ibrahim Narin 4,Novel solid phase extraction procedure for gold(III) on Dowex M 4195 prior to its flame atomic absorption spectrometric determination Journal of Hazardous Materials, Volume 156, Issues 1-3, 15 August 2008, Pages 591-595 Mustafa Tuzen, Kadriye O. Saygi, Mustafa Soylak 5,Flame atomic absorption spectrometric determination of trace amounts of heavy metal ions after solid phase extraction using modified sodium dodecyl sulfate coated on alumina Journal of Hazardous Materials, Volume 155, Issues 1-2, 30 June 2008, Pages 121-127 Mehrorang Ghaedi, Khodabakhsh Niknam, Ardeshir Shokrollahi, Ebrahim Niknam, Hamid Reza Rajabi, Mustafa Soylak