Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin

Table 1

Sequential injection lab-on-valve format hyphenated with amperometry based on PVP/CPE with applications to the analysis of morin in real samples^a.

Samples	Original	Spiked	Total found	Recovery (%)	RSD (%, 𝑛=3)
	(10^−5 mol L^−1)	(10^−5 mol L^−1)	(10^−5 mol L^−1)
Tea	1.76 ± 0.28	2.00	3.70 ± 0.35	97.0 ± 0.6	2.6
		4.00	5.86 ± 0.44	102.5 ± 0.9	2.7
Mulberry leaves	5.13 ± 0.27	6.00	11.27 ± 0.46	102.3 ± 1.1	3.1
		8.00	13.42 ± 0.53	103.6 ± 1.2	3.6

^aThe results were obtained at 95% confidence level.