Determination of Trace Elements in Corydalis conspersa and Corydalis linarioides by ICP-AES

Table 4

Linear correlation and ranges and limits of trace elements reference substances.

Elements	Regression equation	Linear range (μg/mL)	Correlation coefficient	Limit of detection (μg/g)	Limit of quantitation (μg/g)
Al	Y = 16455x + 2.4405	0.1–60.0	1.0000	0.0005	0.0015
As	Y = 44.772x − 1.0121	0.1–10.0	1.0000	0.0480	0.1440
B	Y = 1817x + 0.0907	0.1–10.0	1.0000	0.0013	0.0039
Ca	Y = 15662x + 56.219	0.1–100.0	1.0000	0.0001	0.0003
Cr	Y = 11792x − 0.0231	0.1–10.0	1.0000	0.0002	0.0006
Cu	Y = 16059x + 0.2513	0.1–10.0	1.0000	0.0041	0.0124
Fe	Y = 11077x − 3698.5	0.1–60.0	0.9999	0.0005	0.0015
K	Y = 194954x − 3.6305	0.1–30.0	1.0000	0.0001	0.0003
Li	Y = 1176.8x − 2.823	0.1–10.0	1.0000	0.0042	0.0127
Mg	Y = 198929x + 12.418	0.1–10.0	1.0000	0.0001	0.0003
Mn	Y = 54078x + 1.0599	0.1–10.0	1.0000	0.0001	0.0003
Na	Y = 573630x + 9.3303	0.1–30.0	1.0000	0.0001	0.0003
Ni	Y = 4611.7x + 0.103	0.1–10.0	1.0000	0.0003	0.0009
P	Y = 212.82x − 0.0129	0.1–10.0	1.0000	0.1024	0.3103
Si	Y = 2886.8x + 1601.6	0.1–30.0	0.9996	0.0429	0.1300
Ti	Y = 32280x − 2.9675	0.1–10.0	1.0000	0.0018	0.0054
Zn	Y = 8430.1x + 0.4132	0.1–10.0	1.0000	0.0056	0.0170