Active compound

Spectrum region for analysis [cm⁻¹]

Factors

Calibration model

Validation model

r2

SEC

r2

SEP

Carvacrol

1300 - 900

4

0.972

1.514

0.961

1.742

1300 - 1150

2

0.975

1.358

0.976

1.619

1125 - 1095

1

0.982

0.961

0.987

0.923

995 - 990

1

0.974

1.091

0.954

0.976

Thymol

1300 - 900

4

0.944

1.390

0.956

1.341

1300 - 1200

1

0.935

1.296

0.968

1.142

1170 - 1140

1

0.978

0.920

0.981

0.948

1060 - 1030

3

0.950

1.034

0.943

1.044

P-cymene

1513 - 1515

1

0.939

1.771

0.945

1.623

1019 - 1060

2

0.935

1.397

0.932

1.181

1060 - 1050

1

0.956

0.930

0.966

0.988

1050 - 1017

1

0.988

0.904

0.975

0.910