Rapid Identification of Fupenzi (Rubus chingii Hu) and Its Adulteration by AuNP Visualization

Table 1

The concentration of adulterants in mixtures containing AuNPs was determined by colorimetry, and the results were verified by UV-vis.

Sample	Method	Adulteration concentration (%)	Actual adulteration concentration ± standard deviation (%)	RSD (%)	Recovery (%)
1	Colorimetry	5.0	5.02 ± 0.32	6.3	99.6
2		10.0	9.74 ± 0.52	5.2	102.7
3	UV-vis	5.0	5.06 ± 0.07	1.4	98.8
4		10.0	9.94 ± 0.18	1.8	100.6