| Title: | Determination of penicillamine by batch and flow-injection potentiometry with AgI-based sensor |
|---|
| Authors: | ID Radić, Njegomir (Author)
ID Komljenović, Josipa (Author)
ID Dobčnik, Danilo (Author) |
|---|
| Files: |  Croatica_Chemica_Acta_2000_Radic,_Komljenovic,_Dobcnik_Determination_of_penicillamine_by_batch_and_flow-injection_potentiometry_with_AgI.pdf (196,90 KB)
MD5: 4031B198291A8172DFD2F8278C54A9BB
PID: 20.500.12556/dkum/2b6b7b77-d9c0-46c5-95f2-5819e67632b8
 http://hrcak.srce.hr/132094
|
|---|
| Language: | English |
|---|
| Work type: | Not categorized |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
|
|---|
| Abstract: | Potentiometric determination of penicillamine (pen) is described based on a batch experiment and flow-injection analysis (FIA) using a chemical sensor with AgI-based membrane. The membrane was prepared by pressing silver salts (AgI, Ag2S) and powdered Teflon. This membrane was incorporated in a multipurpose electrode body for batch measurements, and in a tabular flow-through sensor body for FIA measurements. For batch measurements, the equilibrium potentials recorded with continuous addition of standard penicillamine solution were considered in relation to ▫$lg(c_pen/mol L^-1)$▫. Linear response with slope of 60 mV was obtained in the concentration range from 2.5 x ▫$10^5$▫ mol ▫$L^1$▫ to 1.8 x ▫$10^-2$▫mol ▫$L-1$▫. In using the tubular sensor with a membrane of the same coposition for FIA measurements, the linear response with slope of 59 mV was recorded in the concentration range from 1 x ▫$10^4$▫ mol ▫$L^1$▫ to 1 x ▫$10^-1$▫ mol ▫$L^-1$▫. The response of the applied chemical sensor to penicillamine (designated also as RSH) is explained by the formation of sparingly soluble RSAg in the reaction solution and/or the exposed surface of the sensor. The solubility product ▫$K_s(RSAg)$▫ was determined using experimental values recorded both by batch measurements and by the continuous-flow experiment. The mean value obtained by different measurements and using a membrane of the same composition is ▫$K_s(RSAg)$▫ = (1.4+-0.1) x ▫$10^-20$▫ mol ▫$L-2$▫). |
|---|
| Keywords: | analytical chemistry, batch potentiometry, flow-injection analysis, membrane electrode, tubular sensors, penicillamine |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Year of publishing: | 2000 |
|---|
| Number of pages: | str. 265-277 |
|---|
| Numbering: | Letn. 73, št. 1 |
|---|
| PID: | 20.500.12556/DKUM-66656  |
|---|
| ISSN: | 0011-1643 |
|---|
| UDC: | 543.257 |
|---|
| ISSN on article: | 0011-1643 |
|---|
| COBISS.SI-ID: | 5204502 |
|---|
| NUK URN: | URN:SI:UM:DK:YTPWV4B3 |
|---|
| Publication date in DKUM: | 05.07.2017 |
|---|
| Views: | 1467 |
|---|
| Downloads: | 99 |
|---|
| Metadata: |    |
|---|
| Categories: | Misc.
|
|---|
|
:
|
Copy citation |
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
| Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
