Fabrication of paper-based enzyme immobilized microarray by 3D-printing technique for screening α-glucosidase inhibitors in mulberry leaves and lotus leaves

Table 1 The data of compounds in mulberry leaves obtained using HREIMS (A₁: the peak area of the positive group; A₂: the peak area of the blank control)

Peak no.	t_R/min	Identification	Molecular formula	[M−H]⁻			A₁/A₂ (%)
Peak no.	t_R/min	Identification	Molecular formula	Detected	Expected	Error/ppm	A₁/A₂ (%)
1	7.475	Chlorogenic acid	C₁₆H₁₈O₉	353.0885	353.0873	3.4	248
2	23.844	Isoquercitrin	C₂₁H₂₀O₁₂	463.0840	463.0877	− 8.0	57
3	26.036	Astragalin	C₂₁H₂₀O₁₁	447.0936	447.0927	2.0	66
4	32.826	Quercetin	C₁₅H₁₀O₇	301.0360	301.0349	3.7	89

ISSN: 1749-8546