Electrochemistry Application — Novel electrochemical sensing strategy for ultrasensitive detection of tetracycline based on porphyrin/metal phthalocyanine-covalent organic framework

3 measurement groups · 5 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

cyclic voltammetry (CV)

Voltammetry

TC/Apt/CuTAPc-TFPP-COF/GCE · Electrode

CV comparison for fabrication stages under the same electrolyte conditions as Fig. 4.

Temperature: ambient
Atmosphere: ambient
Geometry: three-electrode cell
Context: control-to-aptasensor electrode sequence
Measurement source: PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CV peak current trend across fabrication	peak currents decrease continuously after GCE modification with COF, aptamer incubation, and TC detection	—	—	Qualitative Qualitative	PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4b

EIS and cyclic voltammetry on CHI 660E workstation

Impedance spectroscopy Voltammetry

Apt/CuTAPc-TFPP-COF/GCE · Electrode

Three-electrode system with modified GCE working electrode, Ag/AgCl reference, Pt counter. EIS in phosphate buffer with 5 mM [Fe(CN)6]3-/4-, 0.14 M NaCl, 0.1 M KCl at 0.21 V, 100 kHz to 0.1 Hz, 5 mV amplitude. CV from -0.2 to 0.8 V at 50 mV s-1.

Temperature: ambient
Atmosphere: ambient
Geometry: three-electrode electrochemical cell
Context: aptamer-loaded framework electrode
Measurement source: SI text · S1.5 Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

electrochemical impedance spectroscopy (EIS), fitted Rct

Impedance spectroscopy

TC/Apt/CuTAPc-TFPP-COF/GCE · Electrode

Fabrication-stage comparison for GCE, CuTAPc-TFPP-COF/GCE, Apt/CuTAPc-TFPP-COF/GCE, and TC/Apt/CuTAPc-TFPP-COF/GCE detecting 0.1 pM TC in ferri/ferrocyanide phosphate buffer.

Temperature: ambient
Atmosphere: ambient
Geometry: three-electrode cell
Context: control-to-aptasensor electrode sequence
Measurement source: PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
charge-transfer resistance Rct	1135 ohm	1.135 kOhm	—	Text Exact Reported	PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4a
charge-transfer resistance Rct	93.9 ohm	0.0939 kOhm	—	Text Exact Reported	PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4a
charge-transfer resistance Rct	803.7 ohm	0.8037 kOhm	—	Text Exact Reported	PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4a
charge-transfer resistance Rct	1650 ohm	1.65 kOhm	—	Text Exact Reported	PDF p6 · 3.4. Electrochemical sensing performance · Fig. 4a