2-(6-Ethylamino-3-Ethylimino-2,7-Dimethyl-3h-Xanthen-9-Yl) Benzoic Acid Phenyl Thiourea - A Rhodamine- Based Fluorescent Probe Has Limited Use For Quantitative Hg(ii) Or Mehg(ii) Determination In Environmental Or Biological Samples. SIEPE 2013, 1 (1).