Table 5 Goodness of fit characterised by R ² values, mean transit time (MTT) and area under the curve (AUC) for each model and flow rate (μL/min)

R²

 200

0.919

0.922

0.939

0.885

–

 500

0.884

0.943

0.973

0.907

–

 1000

0.863

0.932

0.965

0.898

–

 2000

0.860

0.879

0.906

0.848

–

MTT

 200

14.93

14.93

13.78

15.59

12.46

 500

8.41

8.15

7.92

8.35

6.18

 1000

5.78

5.58

5.45

5.70

3.74

 2000

3.27

3.19

3.10

3.27

2.36

AUC

 200

145.47

139.88

136.56

139.11

134.57

 500

63.41

59.11

58.06

58.84

56.23

 1000

34.09

32.53

32.66

32.08

28.16

 2000

8.59

8.28

8.14

8.29

7.58