Electrochemistry Application — Detection of Ascorbic Acid by Two-Dimensional Conductive Metal-Organic Framework-Based Electrochemical Sensors

6 measurement groups · 24 results

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

Cu3(HHTP)2/SPE · Electrode

AA oxidation current compared for Cu3(HHTP)2 dispersion concentrations of 1, 2, 4, and 8 mg/mL on SPE; bar heights read from SI Figure S3.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
selected Cu3(HHTP)2 loading for follow-up testsMarked as a best value within this paper	4 mg/mL	4 mg/mL	—	Text Exact Reported	3 · 2. Results and Discussion · Figure S3
AA oxidation current at 1 mg/mL Cu3(HHTP)2 loading	about 3.0 uA from SI Figure S3 bar	3 uA	—	Visual Estimate Approximate	2 · Supplementary Materials · Figure S3
AA oxidation current at 2 mg/mL Cu3(HHTP)2 loading	about 4.2 uA from SI Figure S3 bar	4.2 uA	—	Visual Estimate Approximate	2 · Supplementary Materials · Figure S3
AA oxidation current at 4 mg/mL Cu3(HHTP)2 loadingMarked as a best value within this paper	about 4.8 uA from SI Figure S3 bar	4.8 uA	—	Visual Estimate Approximate	2 · Supplementary Materials · Figure S3
AA oxidation current at 8 mg/mL Cu3(HHTP)2 loading	about 3.8 uA from SI Figure S3 bar	3.8 uA	—	Visual Estimate Approximate	2 · Supplementary Materials · Figure S3

bare SPE · Electrode

Bare SPE control in AA under the same CV comparison; 0.1 mol/L PBS and 100 mV/s reported for CV tests.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AA oxidation current on bare SPE	5.01 x 10-6 A	5.01 uA	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a
AA oxidation peak potential on bare SPE	0.48 V	—	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a

Cu3(HHTP)2/SPE · Electrode

0.1 mol/L PBS; CV range -1 to 1 V; scan rate 100 mV/s; with or without 1 mM AA; optimised at pH 6 and 4 mg/mL Cu3(HHTP)2.

Geometry: screen-printed electrode sensor
Context: Cu3(HHTP)2 composite electrode compared against bare SPE
Measurement source: 3-4 · 2. Results and Discussion; 3.2.4. Electrochemical Test · Figure 3a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AA oxidation current on Cu3(HHTP)2/SPEMarked as a best value within this paper	1.98 x 10-5 A	19.8 uA	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a
AA oxidation potential on Cu3(HHTP)2/SPEMarked as a best value within this paper	0.27 V	—	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a
Cu+/Cu2+ oxidation peak potential	0.28 V	—	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a
C-O to C=O oxidation peak potential	-0.21 V	—	—	Text Exact Reported	4 · 2. Results and Discussion · Figure 3a

Cu3(HHTP)2/SPE · Electrode

CV of 5 mM K4[Fe(CN)6] in 0.1 M KCl at scan rates 20, 50, 80, 120, 150, and 180 mV/s.

Geometry: screen-printed electrode sensor
Context: Cu3(HHTP)2 composite electrode
Measurement source: 4,8 · 2. Results and Discussion; 3.2.5. Calculation of Electrochemically Surface Area

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
electroactive surface area from discussionMarked as a best value within this paper	0.72 cm2	0.72 cm2	—	Text Exact Reported	4 · 2. Results and Discussion
electroactive area from methods calculation	A = 0.07 cm2	0.07 cm2	—	Text Exact Reported	8 · 3.2.5. Calculation of Electrochemically Surface Area

Cu3(HHTP)2/SPE · Electrode

AA oxidation current compared from pH 4 to pH 8; point values read from SI Figure S4.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
selected pH for follow-up testsMarked as a best value within this paper	pH = 6	—	—	Text Exact Reported	3 · 2. Results and Discussion · Figure S4
AA oxidation current at pH 4	about 10.9 uA from SI Figure S4 point	10.9 uA	—	Visual Estimate Approximate	3 · Supplementary Materials · Figure S4
AA oxidation current at pH 5	about 10.7 uA from SI Figure S4 point	10.7 uA	—	Visual Estimate Approximate	3 · Supplementary Materials · Figure S4
AA oxidation current at pH 6Marked as a best value within this paper	about 19.8 uA from SI Figure S4 point	19.8 uA	—	Visual Estimate Approximate	3 · Supplementary Materials · Figure S4
AA oxidation current at pH 7	about 11.9 uA from SI Figure S4 point	11.9 uA	—	Visual Estimate Approximate	3 · Supplementary Materials · Figure S4
AA oxidation current at pH 8	about 11.2 uA from SI Figure S4 point	11.2 uA	—	Visual Estimate Approximate	3 · Supplementary Materials · Figure S4

Cu3(HHTP)2/SPE · Electrode

CV tests at different scan rates; Figure 3c visually spans 20-180 mV/s and Figure 3d plots peak current versus v^1/2.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
peak current versus v^1/2 intercept	-2.984 uA	—	—	Text Exact Reported	5 · 2. Results and Discussion · Figure 3d
maximum scan rate in Figure 3c	180 mV/s	—	—	Figure Axis Rounded Reported	5 · 2. Results and Discussion · Figure 3c
minimum scan rate in Figure 3c	20 mV/s	—	—	Figure Axis Rounded Reported	5 · 2. Results and Discussion · Figure 3c
scan-rate linear fit R2	R2 = 0.99	—	—	Text Exact Reported	5 · 2. Results and Discussion · Figure 3d
peak current versus v^1/2 slope	y = -0.342x - 2.984	—	—	Text Exact Reported	5 · 2. Results and Discussion · Figure 3d