Electrochemical measurements were conducted using a three-electrode system in a 0.8 mL single-compartment Teflon cell with BDD, Pt or GC as the working electrode, while Pt wire and Ag/AgCl (KCl saturated) were used as the counter and reference electrodes, respectively. The BDD (Pt and GC) electrode was fixed with an O-ring (electrode area: 0.36 cm2) and connected to a potentiostat through a copper plate placed under the BDD electrode. Data was recorded by an Autolab potentiostat (PGSTAT101, Metrohm Autolab B.V.) using NOVA software (version 1.11). For the flow injection analysis, a BDD microelectrode was affixed to the output of flow injection apparatus consisting of a six-port HPLC loop injector (Rheodyne model 9725i valve) and a HPLC pump (model PU 712, GL sciences Inc., Japan). The construction of this flow system is based on one described in a published paper53 . The tip of the microelectrode was inserted 1 mm into the 0.8 mm diameter outlet tube. The flow rate was 1 mL/min and the volume of sample injected was 20 μL.
Pu 712
Manufactured by GL Sciences
Sourced in Japan
The PU 712 is a laboratory instrument designed for analytical applications. It features a high-performance pump for delivering precise and consistent liquid flow. The core function of the PU 712 is to provide accurate and reliable liquid handling capabilities for various analytical procedures.
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Lab products found in correlation
2 protocols using pu 712
1
Electrochemical Measurements with BDD, Pt, GC
2
HPLC Evaluation of PAH Separation
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Liquid chromatographic evaluations were carried out using an ordinary HPLC system with a pump (PU712, GL Sciences, Japan), a UV detector (MU701, GL Sciences, Japan), a data processor (EZ Chrom Elite Chromatography Data System, Agilent Technologies, USA), and a Rheodyne injector (8125, Rheodyne, USA).
The system was operated in an isocratic mode at room temperature (~ 25 °C). For the separation of PAHs, 1.6 µL of benzene, 0.8 mg of naphthalene, 0.2 mg of anthracene, and 0.5 mg of phenanthrene were dissolved separately in 1 mL of n-hexane as the standard samples for columns made from SiO2 and SiO2-NH2 monoliths.
For columns made from SiO2-NH2-Ag monolith, all the compounds were dissolved together in n-hexane. The injection volume was 1 µL in each case.
The system was operated in an isocratic mode at room temperature (~ 25 °C). For the separation of PAHs, 1.6 µL of benzene, 0.8 mg of naphthalene, 0.2 mg of anthracene, and 0.5 mg of phenanthrene were dissolved separately in 1 mL of n-hexane as the standard samples for columns made from SiO2 and SiO2-NH2 monoliths.
For columns made from SiO2-NH2-Ag monolith, all the compounds were dissolved together in n-hexane. The injection volume was 1 µL in each case.
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