J Solid State Electrochem

Electronic Supplementary Material

FOR

Poly(2-amino-5-(4-pyridinyl)-1,3,4-thiadiazole)film modifiedelectrode for the simultaneous determinations of dopamine, uricacid and nitrite

Lei ZhangLilinWang

Department of Chemistry,College of Life and Environment Sciences, ShanghaiNormalUniversity, Shanghai, 200234, PR China

Fig. S1.DPVs recorded at PAPT/GCE of 15 cycles (red line), 50 cycles (green line), and 100 cycles (black line)electropolymerization of APT on GCEin 0.1 mol L-1 PBS pH 5.0 containing 350μmol L-1 DA, 350 μmol L-1 UA,and 150μmol L-1 NO2−.

Fig. S2.EIS plots of GCE (a) and PAPT/GCE (b) in the presence of 1.0 mmol L-1 Fe(CN)63-/4- with 0.1 mol L-1 KNO3aselectrolyte. Inset is the Randle’s equivalent circuit.

Fig. S3.Effectof solution pH value on the peak current (a) and peak potentials (b)for the oxidation of50 μmol L-1 DA, 250 μmol L-1 UA and 500 μmol L-1 NO2−.

Scheme S1 The proposed mechanism for the electropolymerization of APT

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Table S1 Characteristics of the electrochemical methods for thesimultaneous determinations of DA, UA and NO2-

Modified electrode / pH / Analyte / Peak potential
(V) / Linear range
(μmol L-1) / Detection limit
(μmol L-1) / Sample / Reference
Graphene/polycyclodextrin/MWCNTs modified GCE / 6.0 / DA
--
NO2- / 0.17
--
0.70 / 0.15–21.65
--
5.0–6750 / 0.05
--
1.65 / human urine
--
human urine / 16
carbon nanotubes incorporated with La(OH)3 nanorods modified GCE / 6.0 / DA
UA
NO2- / 0.24
0.39
0.77 / 0.05-35.36
0.05-790
0.55-720 / 1.67×10-3
1.67×10-3
0.18 / DA injection
human urine
-- / 19
Fe(III)P/MWCNTs modified GCE / 4.0 / DA
UA
NO2- / 0.42
0.58
0.78 / 0.7–3600
5.8–1300
1.0–1600 / 0.09
0.30
0.50 / human urine and serum samples / 23
nano-Au/poly(3-amino-5-mercapto-1,2,4-triazole) modified GCE / 4.0 / DA
UA
NO2- / 0.28
0.45
0.72 / 0.6–340.0
1.6–110.0
15.9–277.0 / 0.05
0.08
0.89 / human urine and serum samples / 24
La–MWCNTs modified GCE / 6.0 / DA
UA
NO2- / 0.23
0.38
0.75 / 0.04–890
0.04–810
0.4–710 / 0.013
0.015
0.13 / human urine and serum samples / 25
poly(2-amino-5-(4-pyridinyl)-1,3,4-
thiadiazole) modified GCE / 5.0 / DA
UA
NO2- / 0.26
0.39
0.77 / 0.95–380
2.0–1000
2.0–1200 / 0.20
0.35
0.60 / human urine and serum samples / This work

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