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Clinical Chemistry, Vol 25, 325-327, Copyright © 1979 by American Association for Clinical Chemistry
JK Allen, WJ Hensley, AV Nicholls and JB Whitfield
Enzymic measurement of high-density lipoprotein cholesterol with a centrifugal analyzer is described. We used polyethylene glycol (Mr 6000), final concentration 100 g/L, to precipitate low-density and very- low-density lipoproteins, thereby eliminating the difficulties of the commonly used heparin/Mn2+ precipitation method and facilitating the use of ethylenediaminetetraacetate-stabilized plasma. As measured by rocket immunoelectrophoresis, this final concentration of polyethylene glycol completely precipitates beta-lipoproteins, leaving the alpha- lipoproteins in solution. Between-run reproducibility (CV) was 3.6%, within-run reproducibility (CV) 0.8%. Reagent costs currently are $US 0.13 per test and large numbers of samples can be handled conveniently. Normal ranges were compiled for 539 men and 444 women. The high-density lipoprotein cholesterol for men was 1.20 +/- 0.31 (SD) mmol/L and for women 1.52 +/- 0.38 (SD) mmol/L.
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