Permeative Amin- oder Säureeinführung zur Erkennung von Sehr Schwacher Säure in Ionenchromatographie

Details

Veröffentlichungs-Nr.

EP3190409

Aktenzeichen

EP17150390

Anmeldetag

5. Januar 2017

Veröffentlichung

30. April 2025

Erteilung

30. April 2025

Rechtsraum

EP

IPC

G01N30/96B01D15/24// B01D15/36

Abstract

A permeative amine/acid introduction device (PAID) is placed after a conventional KOH eluent suppressed conductometric anion chromatography (SCAC) system. The PAID converts the suppressed eluites from the acid form to the corresponding salt. For example, when the analytes are acids, they are converted to the corresponding ammonium salt (NR<2>H + Hex → NR<2>H<2>+ + X<->) and allows very weak acids HX (pK<a>≥ 7.0) that cannot normally be detected by SCAC to be measured by a second conductivity detector following the PAID. Permeative reagent introduction is dilutionless, can be operated without pumps and provides good mixing with low band dispersion (as small as 30 µL). An exemplary amine is diethylamine (DEA), which was chosen as the amine source due to its low pK<b>value (pK<b>3.0), high vapor pressure, and low toxicity and low odor.

Anmelder

Firmen

Board of Regents of the University of Texas System
Board Of Regents Of the University Of Texas System

Land

🇺🇸 USA

Fachgebiete