Wang, Y., Jun Ren, G., & Zhang, D. (2014). Determination of Trace Zinc in Water by Flame Atomic Absorption Spectrometry After Preconcentration by Modified Organobentonite with 1-(2-Pyridylazo)-2-naphthol. Asian Journal of Chemistry, 26(14), 4442–4444. https://doi.org/10.14233/ajchem.2014.16871