Novel potentiometric and optical silver ion-selective sensors with subnanomolar detection limits

被引：89

作者：

Szigeti, Zsofia

Malon, Adam

Vigassy, Tamas

Csokai, Viktor

Grun, Alajos

Wygladacz, Katarzyna

Ye, Nan

Xu, Chao

Chebny, Vincent J.

Bitter, Istvan

Rathore, Rajendra

Bakker, Eric

Pretsch, Erno

机构：

[1] Marquette Univ, Dept Chem, Milwaukee, WI 53210 USA

[2] ETH, Organ Chem Lab, CH-8093 Zurich, Switzerland

[3] Budapest Univ Technol & Econ, Dept Organ Chem Technol, H-1521 Budapest, Hungary

[4] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

ANALYTICA CHIMICA ACTA | 2006年 / 572卷 / 01期

关键词：

ion-selective electrodes; fluorescent microspheres; silver sensors; complex formation constants; lower detection limit; long-term stability;

D O I：

10.1016/j.aca.2006.05.009

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Ten Ag+-selective ionophores have been characterized in terms of their potentiometric selectivities and complex formation constants in solvent polymeric membranes. The compounds with pi-coordination show much weaker interactions than those with thioether or thiocarbarnate groups as the coordinating sites. Long-term studies with the best ionophores show that the lower detection limit of the best Ag+ sensors can be maintained in the subnanomolar range for at least 1 month. The best ionophores have also been characterized in fluorescent microspheres. The so far best lower detection limits of 3 x 10(-11) M (potentiometrically) and 2 x 10(-11) M Ag+ (optically) are found with bridged thiacalixarenes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

共 57 条

[1]

[Anonymous], 1976, PURE APPL CHEM, V48, P127, DOI DOI 10.1351/PAC197648010127

[2] A new neutral carrier for silver ions based on a bis(thiothiazole) derivative and its evaluation in membrane electrodes [J].