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Table 1 The four level two factor experimental design of the calibration set mixtures shown as concentrations of the mixture components in ng ml -1

From: New spectrofluorimetric methods for determination of melatonin in the presence of N-{2-[1-({3-[2-(acetylamino)ethyl]-5-methoxy-1H-indol-2-yl}methyl)-5-methoxy-1H-indol-3-yl]- ethyl}acetamide: a contaminant in commercial melatonin preparations

Mix. No.

MLT

Compound 10

Mix. No.

MLT

Compound 10

1

40

10

9

100

10

2

40

20

10

100

20

3

40

40

11

100

40

4

40

50

12

100

50

5

60

10

13

120

10

6

60

20

14

120

20

7

60

40

15

120

40

8

60

50

16

120

50