TY - JOUR
T1 - Ion-selective electrodes in organic analysis
T2 - Determination of alkyl halides via in situ generation of S-alkylisothiouronium salts
AU - Chan, Wing Hong
AU - Lee, Albert Wai Ming
AU - Cheung, Yu Man
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - Low relative molecular mass alkyl halides, after in situ derivatization to the corresponding S-alkyl-isothiouronium salts in the presence of an excess of thiourea, were determined with a poly(vinyl chloride) membrane S-alkylisothiouronium-selective electrode based on S-butylisothiouronium tetraphenylborate. This membrane electrode exhibited Nernstian response in the range 1.0 × 10-1-1.6 × 10-4 mol dm -3 with an average cationic (positive) slope of 58.8 mV per concentration decade at 25°C. The electrode had a reasonably wide working pH range (6.5-8.5), fast dynamic response time (30 s-2 min), stable response for at least 2 months and high selectivity for the S-alkylisothiouronium ion in the presence of many inorganic and organic ions. The electrode functioned satisfactorily for the determination of primary and secondary alkyl halides, excluding alkyl fluorides.
AB - Low relative molecular mass alkyl halides, after in situ derivatization to the corresponding S-alkyl-isothiouronium salts in the presence of an excess of thiourea, were determined with a poly(vinyl chloride) membrane S-alkylisothiouronium-selective electrode based on S-butylisothiouronium tetraphenylborate. This membrane electrode exhibited Nernstian response in the range 1.0 × 10-1-1.6 × 10-4 mol dm -3 with an average cationic (positive) slope of 58.8 mV per concentration decade at 25°C. The electrode had a reasonably wide working pH range (6.5-8.5), fast dynamic response time (30 s-2 min), stable response for at least 2 months and high selectivity for the S-alkylisothiouronium ion in the presence of many inorganic and organic ions. The electrode functioned satisfactorily for the determination of primary and secondary alkyl halides, excluding alkyl fluorides.
UR - http://www.scopus.com/inward/record.url?scp=0026068736&partnerID=8YFLogxK
U2 - 10.1039/AN9911600039
DO - 10.1039/AN9911600039
M3 - Journal article
AN - SCOPUS:0026068736
SN - 0003-2654
VL - 116
SP - 39
EP - 43
JO - Analyst
JF - Analyst
IS - 1
ER -