Table 1.

Serum prolactin measured by five different automated analyzers and results following various treatments of index patient’s serum.

AnalyzerSerum PRL,1 mIU/LChange with 4 mol/L urea, %% monomeric PRL after PEG treatment (50%)2% ultrafiltrable (40%)2% monomeric after gel filtrationLectin affinity, % (<10%)2125I binding, % (<11%)2
Immuno 18440
Delfia29801941516.79.03622.5
ACS:1801230867
Elecsys5968
AxSYM1800
  • 1 PRL, prolactin.

  • 2 Value in parentheses indicates percentage obtained for normoprolactinemic subjects.