Compounds

Accuracy

 

Precision

Standard
concentration
(µg mL-1)

Amount
recovered
(µg mL-1)

Main
recovery
(%)

 

Intra-day
(RSD%)

Inter-day
(RSD%)

 

 

 

 

 

 

 

Coumarin

2.5047

2.523

100.72

 

0.3625

0.9754

25.047

25.040

99.97

 

0.7470

2.0431

100.188

98.438

98.25

 

0.3558

3.5340

 

 

 

 

 

 

 

o-coumaric acid

2.488

2.524

101.45

 

1.2844

2.5572

24.880

25.326

101.79

 

1.4173

3.4059

99.522

99.735

100.21

 

2.1339

3.3561

 

 

 

 

 

 

 

Syringaldehyde

2.4849

2.467

99.27

 

4.7263

0.5547

24.849

24.979

100.52

 

1.4382

2.5839

99.396

99.620

100.22

 

2.2997

2.7535

 

 

 

 

 

 

 

Dihydrocoumarin

2.4948

2.441

97.86

 

1,4121

4.5559

24.948

24.913

99.86

 

3.3594

0.2098

99.792

99.917

100.13

 

4.3471

1.1586

Table 3: Precision and accuracy of coumarin, o-coumaric acid, dihydrocoumarin and syringaldehyde.