Table 3.

An overview of electrochemical sensors for CAF determination, using nanomaterials and/or nanocomposites.

Electrochemical Methods	Electrode Material	Linearity Range (mol·L−1)	LOD (mol·L−1)	Application	Reference
DPV	Nafion/GO/GCE	4.00 × 10−7–8.00 × 10−5	2.00 × 10−7	Soft and energy drinks, cola beverage	[95]
DPV	MIS/MWCNTs/VTMS/GCE	7.50 × 10−7–4.00 × 10−5	2.20 × 10−7	Coffees, energy drinks,	[96]
DPV	ERGO/GCE	5.00 × 10−5–3.00 × 10−4	Not declared	Cola beverage, tea, and soluble coffee	[97]
DPV	AuNps/chitosan–ionic liquid/Gr/GCE	2.50 × 10−8–2.49 × 10−6	4.42 × 10−9	Energy drink, teas, drugs	[98]
DPV	AuNps@PPY/PGE	2.00 × 10−9–5.00 × 10−8 5.00 × 10−8–1.00 × 10−6	9.00 × 10−10	Soft and energy drinks, green tea, human plasma, drugs and urine	[99]
DPV	AuNps/chitosan/AuE	2.00 × 10−6–5.00 × 10−2	1.00 × 10−6	Cola beverages, energy drink, teas	[94]
DPV	GO/RG/CPE	8.00 × 10−6–8.00 × 10−4	1.53 × 10−7	Cola beverages, energy drink, teas, and drugs	[100]
DPV	CoON/CPE	5.00 × 10−6–6.00 × 10−4	1.60 × 10−8	Coffees	[101]