Sensing Application — One-step electrochemical synthesis of tremella-like Co-MOFs/carbon nanohorns films for enhanced electrochemical sensing of carbendazim in vegetable and fruit samples

6 measurement groups · 25 results

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

DPV analytical calibration for CBZ

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

CBZ concentration series 0.0005, 0.005, 0.01, 0.05, 0.1, 0.5, 1.0, 5.0, 10.0, and 20.0 uM in 0.1 M PBS, pH 6.0; optimum conditions.

Geometry: Co-MOFs/CNHs/GCE
Context: composite target sample
Measurement source: p006-p007 · Section 3.6 · Figure 10; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CBZ linear range upper bound	20.0 uM	20000 nM	range upper bound	Text Range	p006-p007 · Section 3.6 · Figure 10; Table 1
CBZ linear range lower bound	0.5 nM (0.0005 uM)	0.5 nM	range lower bound	Text Range	p006-p007 · Section 3.6 · Figure 10; Table 1
Calibration R2	R2 = 0.993	—	—	Text Exact Reported	p006-p007 · Section 3.6 · Figure 10B
Calibration slope	3.02 uA/uM	—	—	Text Exact Reported	p006-p007 · Section 3.6 · Figure 10B
Limit of detection for CBZMarked as a best value within this paper	0.2 nM (S/N = 3)	0.0002 uM	—	Text Exact Reported	p006-p007 · Section 3.6 · Table 1

Differential pulse voltammetry (DPV)

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

0.1 M PBS, pH 6.0, containing 10.0 uM CBZ; working potential 0.4-1.2 V; pulse width 0.05 s; amplitude 50 mV.

Geometry: Bare GCE and modified GCE electrodes
Context: composite target compared against bare, Co-MOF, and CNH controls
Measurement source: p004-p005 · Sections 2.3 and 3.3 · Figure 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CBZ oxidation peak potential on Co-MOFs/GCE	0.76 V	—	—	Text Rounded Reported	p004-p005 · Section 3.3 · Figure 6
CBZ oxidation peak current on Co-MOFs/CNHs/GCEMarked as a best value within this paper	about 58 uA from Figure 6 axis	—	visual estimate	Figure Axis Approximate	p005 · Section 3.3 · Figure 6

DPV pH optimisation

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

10.0 uM CBZ in 0.1 M PBS over pH 4.0-8.0.

Geometry: Co-MOFs/CNHs/GCE
Context: composite target sample
Measurement source: p005-p006 · Section 3.4 · Figure 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Epa versus pH fit R2	R2 = 0.997	—	—	Text Exact Reported	p005-p006 · Section 3.4 · Figure 7B
Epa versus pH slope	-0.067 V/pH	—	—	Text Exact Reported	p005-p006 · Section 3.4 · Figure 7B
Optimal PBS pH for CBZ peak currentMarked as a best value within this paper	pH 6.0	—	—	Text Exact Reported	p005-p006 · Section 3.4 · Figure 7

DPV standard addition in strawberry and cabbage extracts

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

Real samples centrifuged, filtered through 0.45 um membrane, diluted 100 times with 0.1 M PBS pH 6.0, and analysed by standard addition.

Geometry: Co-MOFs/CNHs/GCE
Context: composite target sample
Measurement source: p002 and p006-p008 · Sections 2.4 and 3.8 · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Detected CBZ for cabbage spiked 0.01 uM	0.0099 uM detected; RSD 3.63%; recovery 99.0%	—	RSD 3.63%	Table Exact Reported	p008 · Section 3.8 · Table 2
Detected CBZ for cabbage spiked 0.04 uM	0.0402 uM detected; RSD 1.86%; recovery 100.5%	—	RSD 1.86%	Table Exact Reported	p008 · Section 3.8 · Table 2
Detected CBZ for cabbage spiked 0.2 uM	0.207 uM detected; RSD 2.32%; recovery 103.5%	—	RSD 2.32%	Table Exact Reported	p008 · Section 3.8 · Table 2
Cabbage recovery maximum	103.5%	—	range maximum	Table Range	p008 · Section 3.8 · Table 2
Cabbage recovery minimum	99.0%	—	range minimum	Table Range	p008 · Section 3.8 · Table 2
Detected CBZ for strawberry spiked 0.01 uM	0.0101 uM detected; RSD 2.66%; recovery 101.0%	—	RSD 2.66%	Table Exact Reported	p008 · Section 3.8 · Table 2
Detected CBZ for strawberry spiked 0.04 uM	0.0389 uM detected; RSD 2.07%; recovery 97.25%	—	RSD 2.07%	Table Exact Reported	p008 · Section 3.8 · Table 2
Detected CBZ for strawberry spiked 0.2 uM	0.203 uM detected; RSD 1.69%; recovery 101.5%	—	RSD 1.69%	Table Exact Reported	p008 · Section 3.8 · Table 2
Strawberry recovery maximum	101.5% in Table 2; text states 101.58%	—	range maximum; text/table rounding discrepancy	Table Rounded Reported	p008 · Section 3.8 · Table 2
Strawberry recovery minimum	97.25%	—	range minimum	Table Range	p008 · Section 3.8 · Table 2

DPV reproducibility, repeatability, and interference tests

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

10.0 uM CBZ in 0.1 M PBS, pH 6.0; seven independent electrodes; one electrode measured twenty times; interferents K+, Na+, Cu2+, Cl-, NO3-, SO4(2-), uric acid, ascorbic acid, fenitrothion, malathion, and thiabendazole.

Geometry: Co-MOFs/CNHs/GCE
Context: composite target sample
Measurement source: p006-p008 · Section 3.7 · Figure 11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Repeatability RSD for twenty repeated measurements	2.36%	—	—	Text Exact Reported	p006-p008 · Section 3.7 · Figure 11A
Reproducibility RSD across seven electrodes	2.45%	—	—	Text Exact Reported	p006-p008 · Section 3.7 · Figure 11A
Interference relative error	within ca. 5% relative error	—	ca.	Text Approximate	p006-p008 · Section 3.7 · Figure 11B

DPV accumulation-time and electrodeposition-time optimisation

Voltammetry

Co-MOFs/CNHs/GCE composite sensing electrode · Electrode

10.0 uM CBZ on Co-MOFs/CNHs/GCE in 0.1 M PBS, pH 6.0.

Geometry: Co-MOFs/CNHs/GCE
Context: composite target sample
Measurement source: p005-p006 · Section 3.4 · Figure 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Optimal accumulation timeMarked as a best value within this paper	90 s	—	—	Text Exact Reported	p005-p006 · Section 3.4 · Figure 8A
Optimal electrodeposition timeMarked as a best value within this paper	200 s	—	—	Text Exact Reported	p005-p006 · Section 3.4 · Figure 8B