Regression equation

Correlation coefficient

Linear range (g/mL)

I=1.3C+13.0

0.9979

1.0×10-9–1.0×10-8

I=9.9 C+13.7

0.9980

1.0×10-8–1.0×10-7

I=54.2C+57.4

0.9978

1.0×10-7–1.0×10-6

I=331.6C+201.5

0.9972

1.0×10-6–1.0×10-5

I=499.2C+3165.3

0.9984

1.0×10-5–6.0×10-5

Table 1: Regression equation and RSD for determinations of FLX.