TY - JOUR
T1 - Ion-selective electrodes in organic analysis
T2 - Determination of amides via hydrolysis to carboxylates
AU - Chan, Wing Hong
AU - Lee, Albert Wai Ming
AU - Tong, Po Lin
AU - Tsang, Kwok Yin
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
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.
UR - http://www.scopus.com/inward/record.url?scp=0026058486&partnerID=8YFLogxK
U2 - 10.1039/AN9911600245
DO - 10.1039/AN9911600245
M3 - Journal article
AN - SCOPUS:0026058486
SN - 0003-2654
VL - 116
SP - 245
EP - 247
JO - Analyst
JF - Analyst
IS - 3
ER -