Sample number

COHb% at different storage durations

0

1 year

2 years

3 years

1

18.25

18.71

18.65

18.55

2

18.33

18.15

18.12

18.37

3

40.54

39.73

40.54

38.33

4

6.73

7.56

7.41

7.14

5

17.52

18.18

17.84

17.68

6

51.35

51.52

51.42

51.27

7

22.16

22.54

22.53

22.52

8

37.67

38.35

38.25

38.13

9

26.32

26.32

26.32

26.35

10

4.57

5.14

4.86

4.62

11

14.32

15.62

15.41

15.34

12

14.23

14.41

14.34

14.33

13

22.35

22.71

22.48

22.52

14

33.38

33.35

33.39

33.34

Table 1: The levels of carboxyhaemoglobin (COHb) in refrigerated stored blood samples measured at different periods (n=14 samples).