Tin(II)-selective membrane potentiometric sensor using a crown ether as neutral carrier
A PVC membrane Sn(II)-ion-selective electrode has been constructed using dibenzo-18-crown-6 (DB18C6) as membrane carrier. The sensor shows a near Nernstian response for Sn(II) ions over a concentration range from 1.0 × 10 −6 to 1.0 × 10 −2 M with a slope of 27.5 ± 0.6 mV per concentration decade in...
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Published in | Sensors and actuators. B, Chemical Vol. 107; no. 2; pp. 756 - 761 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
29.06.2005
|
Subjects | |
Online Access | Get full text |
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Summary: | A PVC membrane Sn(II)-ion-selective electrode has been constructed using dibenzo-18-crown-6 (DB18C6) as membrane carrier. The sensor shows a near Nernstian response for Sn(II) ions over a concentration range from 1.0
×
10
−6 to 1.0
×
10
−2
M with a slope of 27.5
±
0.6
mV per concentration decade in an acidic solution (pH
=
1). The limit of detection was 8.0
×
10
−7
M. It has a response time of <15
s and can be used for at least 3 months without any divergence in potentials. The proposed membrane electrode revealed very good selectivity for Sn(II) ions over a wide variety of other cations and could be used in acidic media. The isothermal temperature coefficient of this electrode amounted to 0.0012
V/°C. The stability constant (log
K
s) of the Sn(II)–DB18C6 complex was determined at 25
°C by potentiometric titration in mixed aqueous solution. It was used as indicator electrode in potentiometric determination of Sn(II) ion in real sample. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0925-4005 1873-3077 |
DOI: | 10.1016/j.snb.2004.12.010 |