US 12,085,544 B2
Methods for simultaneous quantification of anions using ion chromatography and suppressed ion conductivity
Srivatsan Mohana Rangan, Tempe, AZ (US); Anca Delgado, Tempe, AZ (US); and Rosa Krajmalnik-Brown, Chandler, AZ (US)
Assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
Filed by Srivatsan Mohana Rangan, Tempe, AZ (US); Anca Delgado, Tempe, AZ (US); and Rosa Krajmalnik-Brown, Chandler, AZ (US)
Filed on Oct. 11, 2021, as Appl. No. 17/498,203.
Claims priority of provisional application 63/089,945, filed on Oct. 9, 2020.
Prior Publication US 2022/0113287 A1, Apr. 14, 2022
Int. Cl. G01N 30/54 (2006.01); G01N 30/64 (2006.01); G01N 30/86 (2006.01); G01N 33/18 (2006.01)
CPC G01N 30/54 (2013.01) [G01N 30/64 (2013.01); G01N 30/8679 (2013.01); G01N 33/182 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for simultaneous quantification of anions, the method comprising:
loading a sample loop with an aqueous sample;
injecting the sample from the sample loop into a column with an eluent, wherein the column comprises a guard column and an analytical column;
separating, with the column, the injected sample at an effective separation temperature in the presence of an organic modifier into a multiplicity of detectable ionic analytes comprising Cr(VI), Se(VI), As(V), and ClO4−;
suppressing, with a suppressor, a background signal; and
simultaneously quantifying, with a conductivity detector, the multiplicity of ionic analytes.