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Studies on PVC Membrane Ion-selective Electrodes Based on Organic Compounds Containing Nitrogen or Oxygen as Neutral Carries

Author: LuoChuanJun
Tutor: ZhangMaoLin；FanYaoTing
School: Zhengzhou University
Course: Applied Chemistry
Keywords: Benzenedicarboxamide Oxadiazole Dipropylene semicarbazide Diphenoxyethane Ion-selective electrodes
CLC: O657.1
Type: Master's thesis
Year: 2010
Downloads: 58
Quote: 1
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Abstract


This paper consists of four parts: 1, Preparation of a N, N'-two (N-isopropyl-N-2-hydroxyethyl) -1,3 - benzene dicarboxamide (L1), as the carrier of PVC film copper ion selective electrode, the the electrode film plasticizer type and carrier and ion given domain The body (KTpC1PB) content of the electrode performance. The results show that: the electrode Cu2 good the Nernst response performance, 1.0 × 10-4 to 1.0 x 10-1 mol / L concentration range showed a good linear relationship with a detection limit of 6.0 × 10 - 5 mol / L, the slope of the electrode response 27.2mv/decade. electrode has a good selectivity for Cu2, alkali metal, alkaline earth metal, and the majority of transition metal ions on the determination of Cu2 little interference. The electrode can be used in a certain concentration of aqueous formaldehyde, a potentiometric titration can be used as an accurate titration Cu2 indicator electrode, and can be used for the direct determination of the actual sample Cu2 content results the results are consistent with conventional titration method and atomic absorption. 2, N, N'-two (N-isopropyl-N-2-hydroxyethyl) -5 - ferrocenyl-1 ,3 - benzenedicarboxamide (L2) of the neutral carrier PVC film lead ion selective electrode performance. The electrode for Pb2 ??good Nernst response performance showed a good linear relationship between 1.0 × 10-5 to 1.0 x 10-2 mol / L concentration range, a detection limit of 6.7 × 10-6mol / L , the slope of the electrode response for 25.0mv/decade. Electrode of Pb2 has a good selectivity, an alkali metal, an alkaline earth metal and most of the transition metal ion of Pb2 Determination of interference is small. The electrode can be used in a certain concentration of aqueous formaldehyde, the potentiometric titration indicator electrode can be used as accurate titration Pb2, and can be used for the direct determination of the content of the actual sample Pb2, the results are consistent with conventional titration results. 3, developed with 2,5 - bis (2 - pyridyl) -1,3,4 - oxadiazol oxazole (L3), 1,5 - diphenyl-condensing two amino urea (L4), 1,2 - bis (2 - aminophenoxy) ethane (L5) as neutral carrier PVC film aluminum ion selective electrode. Type of electrode Al3 good Nernst response performance, the linear response range of 1.0 × 10-5 ~ 1.0 × 10-2,1.0 × 10-6 ~ 1.0 × 10-2,1.0 × 10 -6 ~ 1.0 × 10-3mol / L, the detection limit of 7.1 × 10-6,4.4 × 10-7,2.3 × 10-7mol / L, the slope of the electrode response were of 22.3,21.6,21.4 mv / decade. Electrode of Al3 has good selectivity and can be used in a certain concentration of aqueous ethanol, can be used as the the accurate titration Al3 potentiometric titration indicator electrode can be used for the direct determination of the the Al3 content of actual sample, results with atomic absorption results consistent. 4, reported by 1,2 - bis (3 - aminophenoxy) ethane (L6), 1,2 - bis (2 - carboxylic acid phenoxy) ethane (L) as the carrier silver PVC film the development of ion-selective electrodes. Class electrode of Ag has a good Nernst response performance, a good linear relationship within the concentration range of 1.0 × 10-6 ~ 1.0 × 10-3mol / L, the detection limit of 8.5 × 10-7, respectively, 6.0 × 10-7mol / L, the slope of the electrode response were 59.9,53.0 mv / decade. Ag2S solid electrode electrode of Ag having a good selectivity, Determination of interference of an alkali metal, an alkaline earth metal and most of the transition metal ion of Ag is very small, in which L, is the electrode of the carrier selectivity of mercury greatly superior to the standard . To such electrodes may be used in a volume fraction of not more than 30% aqueous solution of ethanol can be used as the vitamin B6 content in the Ag accurate titration tap halogen anion content and vitamin B6 tablet potentiometric titration indicator electrode can be used for the actual sample of Ag the direct determination of the content, with satisfactory results.

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