TY - JOUR
T1 - Fused Silica Microcapillaries Used for a Simple Miniaturization of the Electrified Liquid-Liquid Interface
AU - Rudnicki, Konrad
AU - Poltorak, Lukasz
AU - Skrzypek, Sławomira
AU - Sudhölter, Ernst J.R.
PY - 2018/5/21
Y1 - 2018/5/21
N2 - Short pieces of fused silica capillary tubing were used to support an electrified liquid-liquid interface. A methyl deactivated silica capillary having a diameter of 25 μm was filled with 1,2-dichloroethane solution and served as the organic part of the liquid-liquid interface. A nondeactivated fused silica capillary having a diameter of 5, 10, or 25 μm was filled with an aqueous HCl solution and served as the aqueous part of the electrochemical cell. For the latter, silanization of the capillary interior with chlorotrimethylsilane allowed for a successful phase reversal. All capillaries were characterized by ion transfer voltammetry using tetramethylammonium cation as a model ion. This simple, fast, and low-cost miniaturization technique was successfully applied for detection of the antibiotic ofloxacin.
AB - Short pieces of fused silica capillary tubing were used to support an electrified liquid-liquid interface. A methyl deactivated silica capillary having a diameter of 25 μm was filled with 1,2-dichloroethane solution and served as the organic part of the liquid-liquid interface. A nondeactivated fused silica capillary having a diameter of 5, 10, or 25 μm was filled with an aqueous HCl solution and served as the aqueous part of the electrochemical cell. For the latter, silanization of the capillary interior with chlorotrimethylsilane allowed for a successful phase reversal. All capillaries were characterized by ion transfer voltammetry using tetramethylammonium cation as a model ion. This simple, fast, and low-cost miniaturization technique was successfully applied for detection of the antibiotic ofloxacin.
UR - http://resolver.tudelft.nl/aeccced2-6f3a-4298-8cba-1f8693b33850uuid:
UR - http://www.scopus.com/inward/record.url?scp=85047510693&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.8b01351
DO - 10.1021/acs.analchem.8b01351
M3 - Article
AN - SCOPUS:85047510693
VL - 90
SP - 7112
EP - 7116
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 12
ER -