Table 4.

Application of the proposed sensor Au@TiO₂/MWCNTs/GCE for real sample analysis (human serum and saliva samples).

Sample	Added (µM)	Found in Serum (µM) (n = 3)	Recovery (%)	Found in Saliva (µM) (n = 3)	Recovery (%)
1	20	18.02 ± 0.94	90.09	18.33 ± 0.71	91.63
	40	38.10 ± 0.89	95.24	38.28 ± 0.60	95.71
	60	51.17 ± 0.70	85.29	70.74 ± 1.43	117.90
2	20	20.70 ± 1.20	103.48	21.30 ± 0.87	106.52
	40	37.41 ± 0.64	93.53	43.98 ± 0.69	109.95
	60	57.39 ± 0.56	95.65	63.85 ± 0.45	106.41
3	20	22.11 ± 0.88	110.54	22.76 ± 1.02	113.80
	40	38.10 ± 1.09	95.24	39.63 ± 0.70	99.08
	60	51.17 ± 0.79	85.29	68.30 ± 0.83	113.84