Bazel Y, Tupys A, Ostapiuk Y, Tymoshuk O, Imrich J, Šandrejová J
Faculty of Science, P. J. Šafárik University Moyzesova Str., 11 04-001 Košice Slovak Republic.
Faculty of Chemistry, Ivan Franko National University of Lviv Kyryla & Mefodiya Str., 6 79-005 Lviv Ukraine
RSC Adv. 2018 Apr 30;8(29):15940-15950. doi: 10.1039/c8ra02039f. eCollection 2018 Apr 27.
This work introduces two new thiazolylazo dyes 1-[(5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol (BnTAN) and 1-[5-(4-sulfonamidobenzyl-4-methyl-1,3-thiazol-2-yl)diazenyl]naphthalen-2-ol (SABnMeTAN) as possible reagents for spectrophotometric determination of copper(ii) in water samples in the form of a chelate complex. The substances were synthesized for the first time and characterized using the NMR technique. The main characteristics of ligands, such as molar absorption coefficients and protonation constants, were evaluated spectrophotometrically. A non-extractive sequential injection spectrophotometric method for the determination of copper(ii) in the presence of Triton X-100 was developed. The linear range of the calibration plot was observed from 0.063 to 1.270 mg L and the detection limit was 0.044 mg L. The SIA method was compared with the respective manual method and applied for the determination of copper(ii) in tap and river water.
本研究介绍了两种新型噻唑基偶氮染料1-[(5-苄基-1,3-噻唑-2-基)二氮烯基]萘-2-醇（BnTAN）和1-[5-(4-磺酰胺苄基-4-甲基-1,3-噻唑-2-基)二氮烯基]萘-2-醇（SABnMeTAN），它们可能作为分光光度法测定水样中铜（II）螯合物的试剂。这些物质首次合成，并采用核磁共振技术进行表征。通过分光光度法评估了配体的主要特性，如摩尔吸收系数和质子化常数。建立了一种在Triton X-100存在下测定铜（II）的非萃取顺序注射分光光度法。校准曲线的线性范围为0.063至1.270 mg/L，检测限为0.044 mg/L。将顺序注射分析法（SIA）与相应的手工方法进行了比较，并应用于自来水和河水中铜（II）的测定。
