𝔖 Bobbio Scriptorium
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Characteristics of an amperometric detector for capillary HPLC

✍ Scribed by Ruban, V. F.

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
342 KB
Volume
13
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

The main characteristics of a dual‐electrode amperometric detector with a cell of the “cylinder‐in‐flow” type with a working wire electrode have been investigated. The effective cell volume is 10–40 nl in a system with 0.2–0.4 mm i.d. packed fused‐silica columns. Extra‐column spreading at the optimum elution rate does not exceed 0.005 μl^2^. The linear range is 10^3^ at a relative standard deviation of 0.009. The low noise level (2–3 pA) facilitates determination of electro‐active substances. The detection limit for catecholamines is of the order of tenths of a femtomole.

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