Table 2

Effect of repeated freezing cycles on TAC values

Anti-coagulant

Number of freeze/thawing cycles


1

2

3

4

5


K3-EDTA

1.05 ± 0.02

1.00 ± 0.02

1.05 ± 0.03

1.13 ± 0.03

1.22 ± 0.04

Heparin

1.05 ± 0.03

0.95 ± 0.02

1.00 ± 0.03

1.24 ± 0.04

1.32 ± 0.05


Ten different plasma samples from normal individuals, collected on K3-EDTA or heparin, were assayed after a number of 1–5 freeze/thawing cycles, by the automated TAC assay. Values are presented as the mean ± SEM. The target value of non-freezed plasma, collected in a K3-EDTA tube was given in Table 1

Kampa et al. BMC Clinical Pathology 2002 2:3   doi:10.1186/1472-6890-2-3

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