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Improvement of a Phosphate Ion-selective Microsensor Using Bis(dibromophenylstannyl)methane as a Carrier

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Title: Improvement of a Phosphate Ion-selective Microsensor Using Bis(dibromophenylstannyl)methane as a Carrier
Authors: Satoh, Hisashi Browse this author →KAKEN DB
Miyazaki, Yuji Browse this author
Taniuch, Shou Browse this author
Oshiki, Mamoru Browse this author
Rathnayake, Rathnayake M. L. D Browse this author
Takahashi, Masahiro Browse this author
Okabe, Satoshi Browse this author →KAKEN DB
Keywords: Phosphate microsensor
ionophore-doped sensing membrane
tip diameter
Issue Date: 2017
Publisher: Japan Society for Analytical Chemistry
Journal Title: Analytical Sciences
Volume: 33
Issue: 7
Start Page: 825
End Page: 830
Publisher DOI: 10.2116/analsci.33.825
PMID: 28690261
Abstract: An ionophore-doped sensing membrane phosphate (PO4) microsensor based on bis(dibromophenylstannyl)methane (Bis microsensor) is described. The Bis microsensor showed a Nernstian response. The response of the Bis microsensor was log-linear down to a monohydrogen phosphate ion (HPO42−) concentration of 0.5 μM (corresponding to 1.0 μM of orthophosphate at pH 7.2), whereas the detection limit of PO4-microsensors based on trialkyl/aryltin chloride was 50 μM of HPO42−. The Bis microsensor showed excellent selectivity for HPO42− against nitrite, nitrate, chloride, bicarbonate and sulfate, as compared with PO4 microsensors based on trialkyl/aryltin chloride. Dissolved oxygen, which is known to interfere with the response of a previously developed cobalt-based potentiometric solid-state PO4 microsensor, had no effect on the response of the ionophore-doped sensing membrane-type microsensors described herein. Only OH− (i.e., pH) interfered with the ionophore-doped sensing membrane-type microsensors.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 久

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