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Table 2 Linear equations, R 2 coefficients, values of the standard deviation of y-intercept (SD(A)) and the values of limits of detection (LOD) and quantification (LOQ) for the calibration curve utilizing the absorbance at 430 nm

From: Application of alizarin colorimetric measurements for quantification of amine extraction by model food simulants from epoxy polymer

Calibration data

95% ethanol

10% ethanol

3% acetic acid

Water

SD(C)

0.000217

0.001330

0.000484

0.000857

LOD [mg/ml]

0.000254

0.016130

0.002612

0.000733

LOQ [mg/ml]

0.000763

0.048400

0.007838

0.002201

R2 coefficient

0.9975

0.8532

0.9746

0.992

Linear equation

y = -2.823x + 0.860

y = -0.272x + 0.127

y = -0.612x + 0.837

y = -3.857x + 1.068

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