Table 1.

Summary of microfluidic chip technology in food safety sensing.

Target	Chip Materials	Detection Method	LOD	Real Sample Application	Reference
OPS	paper	colorimetric	-	food, beverage	[69]
DDV	paper	CL	3.6 ng/mL	cucumber, tomato and cabbage	[70]
DDV	paper	CL	0.8 ng/mL	vegetables	[71]
OPS	-	colorimetric	33 nM, 90 nM	-	[72]
chlorpyrifos	PDMS	EIS	-	vegetable real samples	[73]
trichlorfon	paper	colorimetric	0.0406 mg/L	-	[74]
OPS	paper	semi quantitative	1.65 μg/mL	-	[75]
E. coli O157: H7, L. monocytogenes and Salmonella	paper	colorimetric	106, 108 and 104 CFU/mL	ready-to-eat meat	[76]
E. coli O157: H7	plastic	spectrophotometry	10 CFU/mL	blood	[77]
E. coli O157: H7	glass	LAMP	1 CFU/mL	-	[78]
Salmonella	-	LAMP	50 cells	pork	[79]
Salmonella	silicon	electrochemical	103 CFU/ml	borate buffer and food extract	[80]
Salmonella	PDMS	optical immunoassay	10 CFU/ ml	fresh poultry packaging	[81]
Cu (II)	paper	-	0.06 mg/L	tap water and tailing water.	[82]
Pb (II), Cd (II)	paper	electrochemical	2 μg/L, 2.3 μg/L	carbonated beverages	[83]
Hg(II), Ag(I)	paper	fluorescence	121 nM, 47 nM	-	[84]
Cu(II)	paper	Colorimetric	0.3 ng/mL	Drinking water, ground water, tomato, rice	[85]
Pb(II)	PDMS	electrochemical	10 μM	-	[86]
Pb(II)	-	electrochemical	95 nM	-	[87]
Cu(II), Hg(II)	paper	fluorescence	0.035 μg/L, 0.056 μg/L	water samples	[88]
sunset yellow, tartrazine	paper	surface-enhanced Raman spectroscopy	10−5 M, 10−4 M	Grape juice, orange juice	[89]
nitrite, nitrate	paper	colorimetric	1.0 μM, 19 μM	Tap water, mineral water, pond water	[90]
Sulfite, nitrite	polymer	fluorescence	-	-	[91]
nitrite	paper	colorimetric	5.6 μM	Ham, sausage, preservative water	[92]
benzoic acid	paper	-	-	commercial food samples	[93]
glucose	paper	electrochemical	0.18 mM	commercial carbonated drinks	[94]