The INNOTEST ß-Amyloid(1-42) HS Conj is used in combination with INNOTEST β-Amyloid(1-42) REF 81576 or REF 81583 and Aβ (1-42) CAL-RVC pack REF 81577 or REF 81584 for the quantitative determination of β-amyloid(1-42) in plasma and cell culture supernatants