Table 1.

Calibration curves, linear ranges and detection limits.^a Chromatographic conditions are the same as in figure 1.

compounds	regression equation	correlation coefficient (r2)	linear range (µg ml−1)	detection limits (µg ml−1)
GSH	y = 7.565x − 2.2469	0.9994	1–100	0.2
PC2	y = 1.5084x − 0.5623	0.9993	2–100	0.5
PC3	y = 2.082x − 0.621	0.9999	2–100	0.5
PC4	y = 1.0385x − 0.3817	0.9991	2–100	0.5
PC5	y = 4.7937x − 0.2713	0.9999	2–100	0.5
PC6	y = 2.712x − 1.2568	0.9999	2–100	0.5

^ay-axis represents the value of the peak area, and the x-axis expresses the value of the concentration.