EPA Science Inventory

SIMULTANEOUS DTERMINATION OF CHROMATE AND AROMATIC HYDROCARBONS IN ENVIRONMENTAL SAMPLES BY CAPILLARY ELECTROPHORESIS

Citation:

Xu, N., H. Shen, AND G W. Sewell*. SIMULTANEOUS DTERMINATION OF CHROMATE AND AROMATIC HYDROCARBONS IN ENVIRONMENTAL SAMPLES BY CAPILLARY ELECTROPHORESIS. INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY. Taylor & Francis Group, London, Uk, 66(3):175-189, (1997).

Impact/Purpose:

Information

Description:

An analytical method was developed to determine simultaneously, the inorganic anion CrO2-4, and organic aromatic compounds including benzoate, 2-Cl-benzoate, phenol, m-cresol and o-/p-cresol by capillary electrophoresis (CE). Chromate and the aromatics were separated in a relatively short time with the use of a tetradecyltrimethylammonium bromide (TTAB) modified buffer solution. The detection limits of all the analytes were in the sub mg/L level with the consumption of a very small volume of sample (< 0.06 μL). Calibration curves with high regression coefficient (r2) values (0.999-1.000) were obtained within two orders of magnitude of concentrations. Factors affecting the separation and the determination of chromate and the organic aromatics, such as the buffer electrolyte concentration, the voltage applied and the TTAB concentration, were investigated. The effect of TTAB on the direction and the magnitude of the electroosmotic flow (EOF) was also discussed. A study of the microbial catalyzed chromate reduction coupled with benzoate oxidation demonstrated the application potential of the proposed method.

URLs/Downloads:

SIMULTANEOUS DETERMINATION OF CHROMATE AND AROMATIC HYDROCARBONS IN ENVIRONMENTAL SAMPLES BY CAPILLARY ELECTROPHORESIS    Exit

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 09/30/1997
Record Last Revised: 09/16/2009
OMB Category: Other
Record ID: 111702

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUBSURFACE PROTECTION AND REMEDIATION DIVISION