Table 1

Sample number	COHb% at different storage durations
Sample number	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).