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Abstract: In this paper, a novel molecularly imprinted polymer coated stir bar has been used to selectively extract naphthalene sulfonates (NSs) directly from seawater sample. 1-Naphthalene sulfonic acid (1-NS) was used as template molecule. The effects of different parameters were optimized on the extraction efficiency and the optimum conditions were established as: the absorption and desorption times were fixed, respectively, at 10 and 15 min, stirring speed was 700 rpm, pH was adjusted to 4.1, amount of NaCl was 1 mol L-1 and extraction process was performed at a temperature of 50 °C. The linear ranges were 2-250 μg L-1 for 3,6-NDS-1-OH (1-naphthol-3,6-disulfonic acid), 4-250 μg L-1 for 2-NS (2-naphthalene sulfonate) and 3-250 μg L-1 for 1-NS. The detection limits were within the range of 0.32-0.95 μg L-1. Under optimum conditions, the detection limits of the NSs were 0.84, 0.95 and 0.32 μg L-1 with the enrichment factor of 117-, 41- and 77-fold for 2-NS, 1-NS, and 6-NDS-1-OH, respectively. The repeatability of the method was satisfactory (0.53 £ RSD £ 6.0 %, n = 10). The method has been successfully applied for the analysis of trace amounts of three naphthalene sulfonates in seawater of Chabahar Bay
Template and target information: 1-naphthalene sulfonic acid, 1-NS, naphthalene sulfonates, NSs
Author keywords: Naphthalene sulfonates (NSs), Molecularly imprinted polymer coated stir bar (MIPSB), seawater, Chabahar Bay