US 2006/0137432 A1 · Process for collecting and concentrating trace organics in a liquid sample

Abstract

The present invention discloses a process for collecting and concentrating trace organics in a liquid sample, which includes steps of adsorption, dehydration, and thermal desorption. The process can be automatically operated by associating with analysis instruments for detecting gaseous materials, such as GC (Gas Chromatography), GC-MS (Gas Chromatography-Mass spectroscopy) and FTIR (Fourier Transfer Infrared spectroscopy) to monitor the organics in the liquid sample. The process can collect and concentrate semi-volatile organic contaminants in a liquid sample which are unable to be collected and concentrated by purge & trap process or head-space process. The process of the present invention can be used to detect trace organics in a detecting limit at a ppt level. The present invention renders other advantages of being able to be on-line operated with analysis instruments, minimizing the manual operation errors, free from organic solvent contamination, rapid detecting time, high detection accuracy, and high detection sensitivity.

Claims11

Dependent claims

A process for collecting and concentrating trace organics in a liquid sample, which comprises the following steps:

(a) continuously passing a liquid sample through a adsorbent-filled tube to adsorb the organics in the liquid sample on the adsorbent;
(b) stopping passing the liquid sample through the column;
(c) continuously blowing hydrogen gas or an inert gas into the tube to carry the liquid component out from the tube and keep the organic adsorbing on the adsorbent;
and
(d) stopping blowing the hydrogen gas or the inert gas into the tube.

2 more elements

Dependencies are inferred from the claim text.

Process for collecting and concentrating trace organics in a liquid sample

Life of this patent

Process for collecting and concentrating trace organics in a liquid sample

Life of this patent

Abstract

Claims11