فایل ورد (word) Application of a PVC membrane electrochemical sensor for Determining La3+ based on 4",4""(5"")-Di-tert-butyldibenzo-18 -crown-6 as a novel ionophore دارای 9 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است
فایل ورد فایل ورد (word) Application of a PVC membrane electrochemical sensor for Determining La3+ based on 4",4""(5"")-Di-tert-butyldibenzo-18 -crown-6 as a novel ionophore کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.
توجه : در صورت مشاهده بهم ريختگي احتمالي در متون زير ،دليل ان کپي کردن اين مطالب از داخل فایل ورد مي باشد و در فايل اصلي فایل ورد (word) Application of a PVC membrane electrochemical sensor for Determining La3+ based on 4",4""(5"")-Di-tert-butyldibenzo-18 -crown-6 as a novel ionophore،به هيچ وجه بهم ريختگي وجود ندارد
بخشی از متن فایل ورد (word) Application of a PVC membrane electrochemical sensor for Determining La3+ based on 4",4""(5"")-Di-tert-butyldibenzo-18 -crown-6 as a novel ionophore :
نام کنفرانس یا همایش : دومين همايش ملي نفت، گاز و پتروشيمي
تعداد صفحات :9
چکیده مقاله:
In this study, a new ion-selective electrode for La3+ is described, illustrating 4",4""(5"")-Di-tert-butyldibenzo-18-crown-6 in a poly(vinylchloride) (PVC) membrane with dibutyl phetalat (DBP) as a plasticizer andsodium tetraphenyl borate (NaTPB) as an anionic additive. This sensor presented very good selectivity andsensitivity towards the La3+ ions over a wide variety of cations, including alkali, alkaline earth, transition and heavy metal ions. The proposed electrode exhibited a significantly enhanced response towards the La3+ions across the concentration range of 1.0×102 to 1.0×106 M for the pH variation from 7 to 11.5 with alower detection limit of 5.6×106 M. Moreover, the sensors displayed the Nernstian slope of 20.2±0.5 mVperdecade, having a fast response time within 30 s over the entire concentration range. It could also be used for at least 3 months with no potential divergence. As a result, the coated graphite sensor was successfully applied as an indicator electrode in the potentiometric titration of nickel ion with EDTA and in directdetermination in La3+ ion with EDTA and in direct determination in the potentiometric titration of lantanium(III) ion with sodium chloride solutions with a sharp potential change occurred at the end point.