Document Type

Patent

Publication Date

7-10-1990

Abstract

A variation of Pulsed Coulometric Detection (PCD) is described in which the detection potential is scanned in a cyclic fashion during current integration to achieve automatic and virtual elimination of baseline drift caused by surface roughening and changes in pH. The technique is examined at a Au electrode for flow-injection determination if thiourea which is typical of numerous sulfur compounds whose anodic reactions are catalyzed by formation of surface oxide. The baseline decays quickly to a near-zero equilibrium value following start-up and is unchanged for a pH step of ca. 2 units. The technique is concluded to be compatible with pH-gradient chromatography.

Patent Number

US 4,939,924

ISURF Reference Number

01151

Assignee

Iowa State University Research Foundation, Inc.,

Application Number

US 07/249,014

Date Filed

9-26-1988

Language

en

File Format

application/pdf

EP0361810A2.pdf (797 kB)
EP 0 361 810 A2

EP0361810A3.pdf (135 kB)
EP 0 361 810 A3

EP0361810B1.pdf (483 kB)
EP 0 361 810 B1

Included in

Chemistry Commons

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