公开(公告)号：US12000775B2

公开(公告)日：2024-06-04

申请号：US17312773

申请日：2019-12-13

Applicant: Amgen Inc.

Inventor： Robert John Duff ,  Christian Gutierrez

IPC: G01N21/33 ,  G01N21/27 ,  G01N21/31

CPC classification number: G01N21/33 ,  G01N21/274 ,  G01N21/278 ,  G01N21/31 ,  G01N2201/0668

Abstract: Disclosed are methods of determining the suitability of a variable-length spectrophotometer using Patent Blue dye or AMG Blue dye. Also disclosed herein are methods of determining the suitability of a fixed path length spectrophotometer for determining protein concentration of a protein sample. AMG Blue dye may also be used to determine the suitability of fixed path length spectrophotometers.