Determination and Analysis of Trace Elements in Five Kinds of Traditional Chinese Medicine in High Blood Pressure Medicinal Food by ICP-AES

Table 4

Correlation coefficients and linear equations of all elements.

Element	Correlation coefficient	Linear equation
As	0.99865	y = 6179x − 555
Ca	0.99990	y = 318900x − 15372.1
Cd	0.99998	y = 36000x + 7163.8
Co	0.99979	y = 76280x − 5313
Cr	0.99998	y = 321700x − 5064.4
Cu	0.99990	y = 521400x − 25491.7
Fe	0.99991	y = 399000x − 18038
K	0.99824	y = 866700x − 178226.6
Mg	0.99989	y = 883600x − 44137.4
Mn	0.99992	y = 3203000x − 133629.7
Na	0.99876	y = 2733000x − 470426.3
Ni	0.99998	y = 140400x − 2841.6
Pb	0.99778	y = 29200x − 3370.3
Se	0.99771	y = 2865x − 336.4
Zn	0.99997	y = 276300x − 6079.3