| Table of contents | |
| Challenges in quantifying airborne metal concentrations in residential environments P.E. Rasmussen, R. Dugandzic, N. Hassan, J. Murimboh, D.C. Grégoire p. 1 | |
| Conformational equilibrium and normal coordinate analyses of ketenecarboxylic acid O=C=CH–COOH Hassan M. Badawi p. 9 | |
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Solid phase extraction of nickel as methylthymol blue complex on naphthalene adsorbent and fl ame atomic absorption spectrometric determination. N. Pourreza, M. Keykhaii, N. Behdarvand p. 17 | |
| Determination of aluminum ion at ng mL-1 level in natural water using trimethoxyphenylfl uorone by light absorption ratio variation approach. Jiao-Rong Ren, Teng Zeng, Jue-Ran Li, Jia-Xiang Yang and Hong-Wen Gao p. 24 | |
| Determination of curcumins in turmeric by micellar electrokinetic capillary chromatography. Xiuli Lin, Ling Xue, Huiyun Zhang, Chenfu Zhu p. 35 | |
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Solution and solid-state NMR studies of thiourea, selenourea, N,N-dimethyl selenourea and their Ag(I) complexes. Mohammed I. M. Wazeer, Anvarhusein A. Isab and Saeed Ahmad p. 43 | |
| Cobalt preconcentration using a new functionalized resin and multivariate optimization by factorial design and Doehlert matrix. Valfredo Azevedo Lemos, Patrícia Xavier Baliza, Juracir Silva Santos and Luana Sena Nunes p. 49 |