Patent · US Active

Titania-based coating for capillary microextraction

US7622191B2 · kind B2 · utility

6Cited by

16References

7Claims

0Family size

Assignee

University of South Florida · US

Inventors

Abdul Malik · Tampa, US
Tae-Young Kim · Jeomgok-myeon, KR

Key dates

Filing date	Jul 19, 2005
Grant date	Nov 24, 2009
Priority date	—
Expiry date	Dec 14, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31663
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method is presented describing in situ preparation of the titania-based sol-gel PDMS coating and its immobilization on the inner surface of a fused silica microextraction capillary. Sol-gel titania-poly (dimethylsiloxane) (TiO2-PDMS) coating was developed for capillary microextraction (CME) to perform on-line preconcentration and HPLC analysis of trace impurities in aqueous samples. The sol-gel titania-based coatings demonstrated strong pH stability and enhanced extraction capability over other commercially availble GC coatings. Extraction characteristics of a sol-gel titania-PDMS capillary remained practically unchanged after continuous rinsing with a 0.1 M NaOH solution (pH=13) for 12 hours.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.