کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1244436 | 1495833 | 2012 | 5 صفحه PDF | دانلود رایگان |
The two ionic liquids (ILs) which melt above room temperature were used as active components of solid-state ion-selective electrodes (ISEs). The both ILs are composed of quaternary phosphonium cation and fluorinated anion, namely bis(trifluoromethylsulfonyl)imide and hexafluorophosphate. Molten and then solidified ILs were used to cover solid-state screen printed electrodes with an ion-sensing layer. The sensors show the response towards iodide. The addition of tetrakis(tert-butyl)phthalocyaninatocobalt (III) iodide to ion-sensing composition significantly improved the operational characteristics. The resulting ISE demonstrates good sensitivity and detection limit: S=−(58.0±0.8) mV/dec, Cmin=6×10−5 М; response time is ca. 15 s. A high selectivity towards iodide over number anions is observed. The ISE could be used for at least a month without any deterioration of signal.
Journal: Talanta - Volume 102, 15 December 2012, Pages 123–127