Sulfonylcalix[4]arenetetrasulfonate as pre-column chelating reagent for selective determination of aluminum(III), iron(III), and titanium(IV) by ion-pair reversed-phase high-performance liquid chromatography with spectrophotometric detection
Sulfonylcalix[4]arenetetrasulfonate as pre-column chelating reagent for selective determination of aluminum(III), iron(III), and titanium(IV) by ion-pair reversed-phase high-performance liquid chromatography with spectrophotometric detection
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DOI：
10.1016/j.talanta.2003.08.001
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发表时间：
2004-02-06
期刊：
影响因子：
6.1
通讯作者：
Miyano, S
中科院分区：
文献类型：
--
作者：
Matsumiya, H;Iki, N;Miyano, S
以磺酰杯[4]芳基四磺酸(SO(2)CAS)为柱前络合剂，建立了离子对反相高效液相色谱分光光度测定超痕量金属离子的方法。在pH 4.7的醋酸缓冲溶液中，金属离子被转化为SO(2)CAS络合物。将络合物进样到n-十八烷基硅烷化硅胶型Chromolith(TM)Performance RP-18E色谱柱上，用甲醇(50wt%)-水(pH 5.6)洗脱，洗脱液中含有四正丁基溴化铵(7.0 mmol kg(-1))、醋酸盐缓冲液(5.0 mmol kg(-1))和乙二胺-N，N，N‘，N’-四乙酸二钠(0.10 mmol kg(-1))。在所用条件下，从21种金属离子[Al(III)，Ba(11)，Be(II)，Ca(II)，Cd(II)，Co(II)，Cr(III)，Cu(11)，Fe(111)，Ga(III)，Hf(IV)，In(III)，Mg(II)，Mn(II)，Mo(VI)，Ni(II)，Pb(11)，Ti(IV)，V(V)，Zn(II)，和Zr(IV)]。Al(III)的检出限为8.8nmoldm(-3)(0.24 ng cm(-3))，Fe(III)的检出限为7.6nmoldm(-3)(0.42 ng cm(-3))，钛(IV)的检出限为17nmoldm(-3)(0.80 ng cm(-3))。以河流和自来水为例，验证了该方法的实用性。(C)2003爱思唯尔B.V.保留所有权利。
Sulfonylcalix[4]arenetetrasulfonate (SO(2)CAS) has been examined as a pre-column chelating reagent for ultratrace determination of metal ions by ion-pair reversed-phase high-performance liquid chromatography with spectrophotometric detection. Metal ions were converted into the SO(2)CAS chelates in an acetic buffer solution (pH 4.7). The chelates were injected onto a n-octadecylsilanized silica-type Chromolith(TM) Performance RP-18e column and were eluted using a methanol (50 wt.%)-water eluent (pH 5.6) containing tetra-n-butylammonium bromide (7.0 mmol kg(-1)), acetate buffer (5.0 mmol kg(-1)), and disodium ethylendiamine-N,N,N',N'-tetraacetate (0.10 mmol kg(-1)). Under the conditions used, Al(III), Fe(III), and Ti(IV) were selectively detected among 21 kinds of metal ions [AI(III), Ba(11), Be(II), Ca(II), Cd(II), Co(II), Cr(III), Cu(11), Fe(111), Ga(III), Hf(IV), In(III), Mg(II), Mn(II), Mo(VI), Ni(II), Pb(11), Ti(IV), V(V), Zn(II), and Zr(IV)]. The detection limits on a 3sigma blank basis were 8.8 nmol dm(-3) (0.24 ng cm(-3)) for Al(III), 7.6 nmol dm(-3) (0.42 ng cm(-3)) for Fe(III), and 17 nmol dm(-3) (0.80 ng cm(-3)) for Ti(IV). The practical applicability of the proposed method was checked using river and tap water samples. (C) 2003 Elsevier B.V. All rights reserved.