公开(公告)号：US20180059057A1

公开(公告)日：2018-03-01

申请号：US15690587

申请日：2017-08-30

Applicant: HACH COMPANY

Inventor： Vishnu V Rajasekharan

IPC: G01N27/49

Abstract: A method for determination of an unknown analyte using quantitative electrochemical generation of a detectable species, which provides specified quantities of the species, is described. As an example, free chlorine concentration measurements may be performed using N,N-Diethyl-p-phenylenediamine (DPD), or N,N-bis(2,4-di-sulfobenzyl)toluidinetetrasodium salt (SBT), for obtaining an in-situ calibration curve, whereby matrix effects are eliminated.

公开(公告)号：US10539529B2

公开(公告)日：2020-01-21

申请号：US15690587

申请日：2017-08-30

Applicant: HACH COMPANY

Inventor： Vishnu V Rajasekharan

IPC: G01N27/49

Abstract: A method for determination of an unknown analyte using quantitative electrochemical generation of a detectable species, which provides specified quantities of the species, is described. As an example, free chlorine concentration measurements may be performed using N,N-Diethyl-p-phenylenediamine (DPD), or N,N-bis(2,4-di-sulfobenzyl)toluidinetetrasodium salt (SBT), for obtaining an in-situ calibration curve, whereby matrix effects are eliminated.