Separation and determination of phthalates by micellar electrokinetic chromatography

A method has been developed for the separation and determination of dimethyl phthalate (DMP), diethyl phthalate (DEP), di- n-butyl phthalate (DBP), di-(2-ethylhexyl) phthalate (DEHP) and di- n-octyl phthalate (DnOP) by micellar electrokinetic chromatography (MEKC). The baseline separation of phthala...

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Bibliographic Details
Published in:Journal of Chromatography A 2005-11, Vol.1095 (1), p.189-192
Main Authors: Guo, Bao-Yuan, Wen, Bei, Shan, Xiao-Quan, Zhang, Shu-Zheng, Lin, Jin-Ming
Format: Article
Language:English
Subjects:
Acetonitriles
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Chromatography, Gas
Chromatography, Micellar Electrokinetic Capillary - methods
Exact sciences and technology
Flame Ionization
Gas chromatographic methods
Methanol
Micellar electrokinetic chromatography
Other chromatographic methods
Phthalate
Phthalic Acids - analysis
Phthalic Acids - isolation & purification
Pollution
Polyethylene Glycols
Sodium Cholate
Soil
Soil and sediments pollution
Soil Pollutants - analysis
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Summary:A method has been developed for the separation and determination of dimethyl phthalate (DMP), diethyl phthalate (DEP), di- n-butyl phthalate (DBP), di-(2-ethylhexyl) phthalate (DEHP) and di- n-octyl phthalate (DnOP) by micellar electrokinetic chromatography (MEKC). The baseline separation of phthalates was achieved by using a buffer of 100 mM sodium cholate, 50 mM borate and 15% methanol (pH 8.5). The optimized MEKC method was used to quantify the concentrations of phthalates in 11 soil samples from different regions of China. The contents of DEP, DBP and DEHP in soils were ranged 0–0.42, 0–1.43, and 0.24–2.35 mg/kg, respectively, and no DMP and DnOP was detected. The limits of detection for DMP, DEP, DBP, DEHP, and DnOP were found to be 0.050, 0.051, 0.052, 0.054, and 0.063 mg/kg, respectively. The results obtained by the MEKC method were compared with those obtained by gas chromatography with flame ionization detector (GC-FID), and a good agreement was achieved.
ISSN:0021-9673
DOI:10.1016/j.chroma.2005.09.075