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Table 3 The results of the three constituents by PLS models with different preprocessing methods

From: Rapid monitoring of flavonoid content in sweet tea (Lithocarpus litseifolius (Hance) Chun) leaves using NIR spectroscopy

Parameter

Method

R2c

RMSEC

R2v

RMSEV

R2p

RMSEP

Total flavonoids

 None

0.826

0.641

0.512

1.085

0.570

0.942

 SG

0.751

0.768

0.502

1.095

0.569

0.944

 MA(9)

0.708

0.831

0.474

1.126

0.434

1.082

 SNV

0.746

0.775

0.408

1.194

0.499

1.017

 MA + MSC

0.569

1.010

0.400

1.202

0.412

1.103

 SG + D(1)

0.878

0.538

0.453

1.149

0.289

0.522

 SG + D(2)

0.998

0.069

0.931

0.409

0.893

0.131

Trilobatin

 None

0.967

1.654

0.872

3.283

0.902

2.993

 SG

0.904

3.021

0.831

4.049

0.824

4.412

 MA(9)

0.922

2.788

0.851

3.894

0.841

4.059

 SNV

0.889

3.274

0.758

4.877

0.792

4.805

 MA + MSC

0.837

4.271

0.728

5.564

0.793

4.789

 SG + D(1)

0.953

2.083

0.871

3.482

0.194

3.370

 SG + D(2)

0.993

0.832

0.829

4.102

0.250

2.457

Phloridin

 None

0.948

0.589

0.752

1.306

0.684

1.378

 SG

0.741

1.531

0.482

2.185

0.467

1.906

 MA(9)

0.738

1.640

0.531

2.215

0.431

1.891

 SNV

0.987

0.263

0.858

0.893

0.818

1.085

 MA + MSC

0.776

1.519

0.559

2.151

0.234

2.077

 SG + D(1)

0.942

0.686

0.750

1.436

0.139

2.256

 SG + D(2)

0.692

1.464

0.432

2.007

0.127

2.368

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Plant Methods

ISSN: 1746-4811