Standards

Regression equations

Vanillic acid

Y = 1.0138x − 0.0071 (R² = 0.999)

Catechol

Y = 1.9037x − 0.013 (R² = 0.9949)

Gallic acid

Y = 1.3595x − 0.003 (R² = 0.9946)

Chlorogenic acid

Y = 0.66x + 0.00002 (R² = 0.99)

Ferulic acid

Y = 0.7564x + 0.1046 (R² = 0.95)

2 phenolics

Y = 1.5532x + 0.0318 (R² = 0.99)

3 phenolics

Y = 1.7526x + 0.0421 (R² = 0.99)

4 phenolics

Y = 1.8556x − 0.0509 (R² = 0.99)

5 phenolics

Y = 1.5237x − 0.0226 (R² = 0.99)

7 phenolics

y = 0.8773x − 0.0625 (R² = 0.99)

9 phenolics

y = 1.0022x − 0.1866 (R² = 0.98)

11 phenolics

y = 0.7771x − 0.0751 (R² = 0.98)