cMOF Evidence Base
Sensing Application — Ferrocene-functionalized Ni(II)-based metal-organic framework as electrochemical sensing interface for ratiometric analysis of Cu2+, Pb2+ and Cd2+

Measurement evidence

Sensing Application

Ferrocene-functionalized Ni(II)-based metal-organic framework as electrochemical sensing interface for ratiometric analysis of Cu2+, Pb2+ and Cd2+ · Wan J., Shen Y., Xu L. et al. · Journal of Electroanalytical Chemistry · 2021 · 115374

8 measurement groups · 85 results

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

DPASV ratiometric calibration for simultaneous Cu2+, Pb2+ and Cd2+

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

Optimised DPASV in 0.1 M ABS (pH 6), deposition potential -1.2 V and deposition time 200 s; concentrations 0, 0.001, 0.005, 0.01, 0.05, 0.1, 0.5, 0.8, 1.0, 1.5, 1.8 and 2.0 uM; detection signal IM/IFc.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode
Measurement source
p006 · 3.4. Simultaneous determination · Fig. 6 and Table 1
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Cd2+ linear range lower bound0.01 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cd2+ calibration R20.992——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cd2+ calibration slopeI_Cd2+/IFc = 0.396 C_Cd2+(uM) + 0.070——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cd2+ linear range upper bound2.0 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cu2+ linear range lower bound0.01 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cu2+ calibration R20.991——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cu2+ calibration slopeI_Cu2+/IFc = 0.381 C_Cu2+(uM) + 0.045——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cu2+ linear range upper bound2.0 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ high-concentration linear range lower bound0.1 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ high-concentration calibration R20.997——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ high-concentration calibration slopeI_Pb2+/IFc = 0.669 C_Pb2+(uM) + 0.301——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ high-concentration linear range upper bound2.0 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ low-concentration linear range lower bound0.001 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ low-concentration calibration R20.993——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ low-concentration calibration slopeI_Pb2+/IFc = 1.200 C_Pb2+(uM) + 0.251——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Pb2+ low-concentration linear range upper bound0.1 uM——Table
Exact Reported		p007 · 3.4. Simultaneous determination · Table 1
Cd2+ limit of detectionMarked as a best value within this paper7.1 nM—S/N = 3Text
Exact Reported		p007 · 3.4. Simultaneous determination
Cu2+ limit of detectionMarked as a best value within this paper6.3 nM—S/N = 3Text
Exact Reported		p007 · 3.4. Simultaneous determination
Pb2+ limit of detectionMarked as a best value within this paper0.2 nM—S/N = 3Text
Exact Reported		p007 · 3.4. Simultaneous determination

DPASV heavy-metal-ion peak assignment

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

0.1 M HAc-NaAc buffer solution; deposition potential -1.2 V, deposition time 100 s unless otherwise stated; stripping amplitude 0.05 V, pulse period 0.2 s, pulse width 0.05 s.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode in three-electrode cell
Context
target electrode compared with bare GCE and NH2-Ni-MOF/GCE
Measurement source
p006 · 3.3. Assay feasibility · Fig. S3
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Cd2+ stripping peak potential-0.81 V——Text
Exact Reported		p006 · 3.3. Assay feasibility · Fig. S3
Cu2+ stripping peak potential-0.044 V——Text
Exact Reported		p006 · 3.3. Assay feasibility · Fig. S3
Fc oxidation reference peak potential0.57 V——Text
Exact Reported		p006 · 3.3. Assay feasibility
Pb2+ stripping peak potential-0.49 V——Text
Exact Reported		p006 · 3.3. Assay feasibility · Fig. S3

DPASV experimental-condition optimisation

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

Optimised supporting electrolyte, pH, deposition potential and deposition time for Cu2+, Pb2+ and Cd2+ detection on Fc-NH2-Ni-MOF/GCE.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode
Measurement source
SI rendered text · Experimental conditions optimization · Fig. S5
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
selected deposition potentialMarked as a best value within this paper-1.2 V——Text
Exact Reported		SI rendered text · Experimental conditions optimization · Fig. S5c
selected deposition timeMarked as a best value within this paper200 s——Text
Exact Reported		SI rendered text · Experimental conditions optimization · Fig. S5d
selected supporting electrolyteMarked as a best value within this paper0.1 M ABS selected over 0.1 M PB——Text
Exact Reported		SI rendered text · Experimental conditions optimization · Fig. S5a
selected electrolyte pHMarked as a best value within this paperpH 6——Text
Exact Reported		SI rendered text · Experimental conditions optimization · Fig. S5b

DPASV reproducibility across five parallel electrodes

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

0.1 M ABS (pH 6) containing 1.0 uM each of Cu2+, Pb2+ and Cd2+; five parallel Fc-NH2-Ni-MOF/GCE electrodes.

Geometry
five independently prepared Fc-NH2-Ni-MOF/GCE electrodes
Context
target ratiometric sensing electrode
Measurement source
p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Cd2+ non-ratiometric reproducibility RSD7.4%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
Cd2+ ratiometric reproducibility RSDMarked as a best value within this paper1.9%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
Cu2+ non-ratiometric reproducibility RSD6.3%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
Cu2+ ratiometric reproducibility RSDMarked as a best value within this paper2.1%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
Pb2+ non-ratiometric reproducibility RSD4.1%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a
Pb2+ ratiometric reproducibility RSDMarked as a best value within this paper1.5%——Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8a

DPASV river-water spike recovery with ICP-AES comparison

Bulk elemental and compositional analysisVoltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

Local Licun river water recovery experiment compared with ICP-AES for Cu2+, Pb2+ and Cd2+.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode in river-water matrix
Measurement source
SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
CD river-water added concentration0.112 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water DPASV found concentration replicate 10.114 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water DPASV found concentration replicate 20.12 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water DPASV found concentration replicate 30.115 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water ICP-AES concentration replicate 10.114 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water ICP-AES concentration replicate 20.117 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CD river-water ICP-AES concentration replicate 30.118 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cd2+ river-water recovery upper bound107%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cd2+ river-water recovery lower bound102%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cd2+ river-water DPASV RSD2.5%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water added concentration0.064 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water DPASV found concentration replicate 10.067 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water DPASV found concentration replicate 20.068 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water DPASV found concentration replicate 30.063 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water ICP-AES concentration replicate 10.063 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water ICP-AES concentration replicate 20.065 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
CU river-water ICP-AES concentration replicate 30.064 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cu2+ river-water recovery upper bound106%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cu2+ river-water recovery lower bound98%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Cu2+ river-water DPASV RSD4.2%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water added concentration0.207 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water DPASV found concentration replicate 10.232 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water DPASV found concentration replicate 20.228 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water DPASV found concentration replicate 30.237 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water ICP-AES concentration replicate 10.222 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water ICP-AES concentration replicate 20.226 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
PB river-water ICP-AES concentration replicate 30.229 mg L-1——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Pb2+ river-water recovery upper bound115%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Pb2+ river-water recovery lower bound110%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2
Pb2+ river-water DPASV RSD2.2%——SI Table
Exact Reported		SI rendered text · Detection of Cu2+, Pb2+ and Cd2+ in river water samples using ICP-AES and this method · Table S2

DPASV selectivity/interference test

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

0.1 M ABS (pH 6) with 1.0 uM each Cu2+, Pb2+ and Cd2+; interfering ions Mn2+, Al3+, K+, Ca2+, Na+ and Zn2+ at 5.0 uM each.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode
Measurement source
p007 · 3.5. Selectivity, reproducibility, and stability · Fig. 7
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
maximum relative difference under interfering ionsall less than 7%—upper boundText
Range		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 7b-d

DPASV storage stability

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

Electrode stored at 4 C and tested every 5 days; 0.1 M ABS (pH 6) containing 1.0 uM each of Cu2+, Pb2+ and Cd2+.

Temperature
277
Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode
Measurement source
p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Cd2+ response retained after 20 days94.6%0.946 fraction of initial response—Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8b
Cu2+ response retained after 20 days90.5%0.905 fraction of initial response—Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8b
Pb2+ response retained after 20 days90.1%0.901 fraction of initial response—Text
Exact Reported		p008 · 3.5. Selectivity, reproducibility, and stability · Fig. 8b

DPASV tap-water spike recovery

Voltammetry

Fc-NH2-Ni-MOF/GCE · Electrode

Real tap water and target-added tap water containing 1.0 uM each of Cu2+, Pb2+ and Cd2+.

Geometry
Fc-NH2-Ni-MOF/GCE working electrode
Context
target ratiometric sensing electrode in real sample matrix
Measurement source
p008 · 3.6. Real samples analysis · Fig. 9 and Table 2
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
CD tap-water found concentration replicate 10.99 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
CD tap-water found concentration replicate 21.1 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
CD tap-water found concentration replicate 30.95 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cd2+ tap-water recovery upper bound110%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cd2+ tap-water recovery lower bound95%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cd2+ tap-water recovery RSD7.7%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
CU tap-water found concentration replicate 11 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
CU tap-water found concentration replicate 20.97 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
CU tap-water found concentration replicate 31.1 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cu2+ tap-water recovery upper bound110%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cu2+ tap-water recovery lower bound97%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Cu2+ tap-water recovery RSD6.7%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
PB tap-water found concentration replicate 10.96 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
PB tap-water found concentration replicate 21 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
PB tap-water found concentration replicate 30.98 uM——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Pb2+ tap-water recovery upper bound100%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Pb2+ tap-water recovery lower bound96%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2
Pb2+ tap-water recovery RSD2.0%——Table
Exact Reported		p008 · 3.6. Real samples analysis · Table 2