Table 5.
Reports of screen-printed sensors for vitamin C (L-ascorbic acid).
| Electrode Components | Supporting Electrolyte | Measurement Technique | Detection Limit (µM) | Linear Range (µM) | Sample/s | Modification Method | Reference |
|---|---|---|---|---|---|---|---|
| W: Nano-PANI SPCE R: Ag/AgCl C: Pt mesh |
PBS pH 6.8 | Amperometry 0 V | 8.3 | 500–8000 | Tablet pharmaceutical | Drop coating | [40] |
| W: PANI-SPCE R: Ag/AgCl C: GCE |
0.05 M Phosphate buffer pH 7.0 & 0.5 M NaCl | Cyclic Voltammetry | 0.1 | 1.00–80.00 | Grapefruit juice | Oxidative chemical polymerisation |
[41] |
| W: PANI-SPCE R: Carbon C: Carbon |
0.1 M Acetate buffer pH 5.0 | Chronoamperometry 0.4 V | 30 | 30.00–270.00 | None reported | Inkjet printed Paper based design |
[42] |
| W: o-AP-SPCE R: Ag C: Carbon |
0.1 M Phosphate buffer pH 7.2 | Amperometry 0.2 V | 0.86 | 2.00–20.00 | Apple, Kiwi, Lemon, Orange, Pineapple, Strawberry, Tomato | Electrografted film | [43,44] |
| W: SPCE R: Ag/AgCl C: Carbon |
0.1 M Phosphate buffer pH 2.0 | DPV 0.0 V > −1.2 V | 1360 | 1000–10,000 | Orange juice | Unmodified | [45] |
| W: SPGNE R: Ag/AgCl C: Pt |
0.1 M Phosphate buffer pH 7.0 | DPV −0.2 V > +0.6 V Ep = −0.5 V |
0.95 | 4.00–4500.00 | Injection formula | Graphene ink formulation |
[46] |
| W: MWCNT-SPCE R: Ag/AgCl wire C: Pt wire |
0.01 M Phosphate buffer pH 7.0 | Amperometry −1.2 V | 11 | 50.00–400.00 | Tablet pharmaceutical Capsule pharmaceutical |
Drop coating | [48,49] |
| W: N6-NFM-SPCE R: Ag C: Graphite |
Buffer citrate pH 4 | Amperometry 0.35 V | Not reported | 56.78–7381.33 | Tangerine, Apple, Pear, Kiwi, Lemon, Strawberry | Electrospun membrane | [50] |
W: Working Electrode. R: Reference Electrode. C: Counter Electrode. PANI-SPCE: Polyaniline screen-printed carbon electrode. o-AP-SPCE: o-Aminophenol film screen-printed carbon electrode. SPGNE: Screen-printed graphene electrode. MWCNT-SPCE: Multi-walled carbon nanotube screen-printed carbon electrode. N6-NFM-SPCE: Nylon 6 nano fibrous membrane screen-printed carbon electrode.