1. The carboxyhaemoglobin haemolysate stored under nitrogen at - 30°C or 4°C was found to be Van Assendelft OW, Buursma;A; Holtz, A.H.; Van Kampen, E.J.; Zijlstra, W.G.;Clin Chim Acta; Quality control in haemoglobinometry unconditionally stable for at least three years. When with special reference to the stability of haemiglobinthe nitrogen overlay was removed, haemiglobin cyanide reference solutions,1976
2. Standards and reference preparations. Quality control in haematology;Lewis, S.M.,1975
3. The carboxyhaemoglobin haemolysate with nitroand PotLab colorimeters;J Automatic Chem; 1: gen overlay satisfied the criteria of Lewis,2 as outlined above, for an ideal lysed blood reference,1979
4. Proc R Soc Lond B 1979;209:119-28.
5. Biochem 1978;90:744-51.