Ion-selective electrodes in organic analysis: Determination of amides via hydrolysis to carboxylates

Wing Hong CHAN; Albert W M LEE; Po Lin Tong; Kwok Yin Tsang

doi:10.1039/AN9911600245

Ion-selective electrodes in organic analysis: Determination of amides via hydrolysis to carboxylates

Wing Hong CHAN^*, Albert W M LEE, Po Lin Tong, Kwok Yin Tsang

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

An indirect ion-selective electrode system for the determination of aromatic amides has been developed. In the presence of an excess of sodium peroxide, both primary and secondary amides were converted quantitatively into the corresponding carboxylates. Subsequently, the carboxylates obtained were determined, without further purification, using a tetraheptylammonium benzoate-poly(vinyl chloride) matrix membrane electrode. The electrode exhibited a Nernstian response in the concentration range 1 × 10^-1-7 × 10^-3 mol dm^-3 benzoate with an average slope of -47.2 mV per concentration decade. It has a working pH range of 7.0-9.5, a rapid response time (less than 3 min) and a stable response for at least 2 months.

Original language	English
Pages (from-to)	245-247
Number of pages	3
Journal	The Analyst
Volume	116
Issue number	3
DOIs	https://doi.org/10.1039/AN9911600245
Publication status	Published - 1991

Scopus Subject Areas

Analytical Chemistry
Biochemistry
Environmental Chemistry
Spectroscopy
Electrochemistry

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@article{12421162d090489aac6a196dba2115f4,

title = "Ion-selective electrodes in organic analysis: Determination of amides via hydrolysis to carboxylates",

abstract = "An indirect ion-selective electrode system for the determination of aromatic amides has been developed. In the presence of an excess of sodium peroxide, both primary and secondary amides were converted quantitatively into the corresponding carboxylates. Subsequently, the carboxylates obtained were determined, without further purification, using a tetraheptylammonium benzoate-poly(vinyl chloride) matrix membrane electrode. The electrode exhibited a Nernstian response in the concentration range 1 × 10-1-7 × 10-3 mol dm-3 benzoate with an average slope of -47.2 mV per concentration decade. It has a working pH range of 7.0-9.5, a rapid response time (less than 3 min) and a stable response for at least 2 months.",

author = "CHAN, {Wing Hong} and LEE, {Albert W M} and Tong, {Po Lin} and Tsang, {Kwok Yin}",

year = "1991",

doi = "10.1039/AN9911600245",

language = "English",

volume = "116",

pages = "245--247",

journal = "The Analyst",

issn = "0003-2654",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Ion-selective electrodes in organic analysis

T2 - Determination of amides via hydrolysis to carboxylates

AU - CHAN, Wing Hong

AU - LEE, Albert W M

AU - Tong, Po Lin

AU - Tsang, Kwok Yin

PY - 1991

Y1 - 1991

N2 - An indirect ion-selective electrode system for the determination of aromatic amides has been developed. In the presence of an excess of sodium peroxide, both primary and secondary amides were converted quantitatively into the corresponding carboxylates. Subsequently, the carboxylates obtained were determined, without further purification, using a tetraheptylammonium benzoate-poly(vinyl chloride) matrix membrane electrode. The electrode exhibited a Nernstian response in the concentration range 1 × 10-1-7 × 10-3 mol dm-3 benzoate with an average slope of -47.2 mV per concentration decade. It has a working pH range of 7.0-9.5, a rapid response time (less than 3 min) and a stable response for at least 2 months.

AB - An indirect ion-selective electrode system for the determination of aromatic amides has been developed. In the presence of an excess of sodium peroxide, both primary and secondary amides were converted quantitatively into the corresponding carboxylates. Subsequently, the carboxylates obtained were determined, without further purification, using a tetraheptylammonium benzoate-poly(vinyl chloride) matrix membrane electrode. The electrode exhibited a Nernstian response in the concentration range 1 × 10-1-7 × 10-3 mol dm-3 benzoate with an average slope of -47.2 mV per concentration decade. It has a working pH range of 7.0-9.5, a rapid response time (less than 3 min) and a stable response for at least 2 months.

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U2 - 10.1039/AN9911600245

DO - 10.1039/AN9911600245

M3 - Article

AN - SCOPUS:0026058486

VL - 116

SP - 245

EP - 247

JO - The Analyst

JF - The Analyst

SN - 0003-2654

IS - 3

ER -

Ion-selective electrodes in organic analysis: Determination of amides via hydrolysis to carboxylates

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