TERMIUM Plus®

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WIRE TRANSPORT DETECTOR [1 record]

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Record 1 1999-04-23

English

Subject field(s)
  • Analytical Chemistry
DEF

In this form of transport detector for h.p.l.c. [high-performance liquid chromatography], the eluate is deposited upon a fine stainless steel wire that has been cleaned by being heated at 850°C. The volatile solvent is evaporated and the solute oxidized at 700-800°C in air to a mixture of carbon dioxide and water. The oxidation products are mixed with hydrogen and passed over a nickel catalyst at 330°C to give methane which is burnt in a flame ionization detector to give an electrical signal that can be amplified and recorded. The detector gives a linear response over a wide concentration range [...] The sensitivity has been improved and the noise level reduced by using either a ceramic (kaolin) or ceramic-metal (kaolin and copper) coating to the wire.

Key term(s)
  • moving-wire detector
  • moving-filament detector

French

Domaine(s)
  • Chimie analytique

Spanish

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