Table 2 Standard curve of starch concentration.

From: LIGHt-based rapid detection of starch in tobacco leaves by smartphone sensing

Method

Regression equation

Correlation coefficient R2

Linear range (µg/mL)

Microplate reader

y = 0.0069 x + 0.0608

0.9972

0.00–80.00

Smartphone colorimetry

y = −1.376 x + 186.9

0.9941

0.00–80.00