Serbin Rastislav, Bazel Yaroslav, Ružičková Silvia
Department of Analytical Chemistry, Faculty of Science, Pavol Jozef Šafárik University, Šrobárova 2, 041 80 Košice, Slovak Republic.
Department of Analytical Chemistry, Faculty of Science, Pavol Jozef Šafárik University, Šrobárova 2, 041 80 Košice, Slovak Republic.
Talanta. 2017 Dec 1;175:46-52. doi: 10.1016/j.talanta.2017.06.078. Epub 2017 Jul 4.
A novel method for determination of platinum species by application of graphite furnace atomic absorption spectrometry (GFAAS) was developed. The principle of determination is the formation of platinum ion associates (IA) with SCN and polymethine basic agent 1,3,3-trimethyl-2-[3-(1,3,3-trimethyl-1,3-dihydroindol-2-yliden)-propyl-1,3-dienyl]-3H-indolium chloride (TTDI), which can then be extracted by various organic solvents. Different options for analytical signal intensification (ultrasonic and microwave energy) were examined. The conditions found for ion associate formation and extraction have enabled the proposing of a new Pt(II) and Pt(IV) speciation process. These species can be reliably determined simultaneously at concentration ratios from 1:5 to 5:1. Moreover, the ion associates of platinum with TTDI can be extracted with toluene up to a volume ratio of aqueous and organic phases of V:V = 50:1. This fact for Pt determination using GFAAS means decreasing the limit of detection (LOD) from 7.1µgL to 0.3µgL. The method was applied for Pt determination in a model and in spiked water samples.
开发了一种应用石墨炉原子吸收光谱法（GFAAS）测定铂物种的新方法。测定原理是铂离子与硫氰酸盐和聚甲炔碱性试剂1,3,3 - 三甲基 - 2 - [3 - (1,3,3 - 三甲基 - 1,3 - 二氢吲哚 - 2 - 亚基) - 丙基 - 1,3 - 二烯基] - 3H - 吲哚鎓氯化物（TTDI）形成离子缔合物（IA），然后可用各种有机溶剂萃取。研究了分析信号增强的不同选项（超声和微波能量）。所发现的离子缔合物形成和萃取条件使得能够提出一种新的Pt(II)和Pt(IV)形态分析方法。这些物种在浓度比为1:5至5:1时能够可靠地同时测定。此外，铂与TTDI的离子缔合物可用甲苯萃取，水相和有机相的体积比可达V:V = 50:1。这一使用GFAAS测定铂的事实意味着检测限（LOD）从7.1µg/L降至0.3µg/L。该方法应用于模型水样和加标水样中铂的测定。
