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- W2368996064 abstract "[Objective] The study aimed to establish the new method for determining the contents of the benzoic acid and phthalic acid by the micellar electrokinetic chromatography with the coated capillaries.[Method] The new method of micellar electrokinetic chromatography by using the trimethylchlorosilane coated capillaries with UV diode array detection was used for the separation and determination of benzoic acid in the drink and benzoic acid and phthalic acid in the laboratory waste water.The effects of the wavelength,pH value,buffer solution,voltage and other factors on the separation and determination of the benzoic acid and phthalic acid were investigated.[Result] Under the optimized operation conditions of 20 mmol/L SDS + 35 mmol/L borate(pH of 9.5)as the running buffer solution,the detection wavelength of 210 nm,and the separation voltage of 14 kV,the benzoic acid and phthalic acid could be separated in 3 min,their good linear relationships between the peak heights and concn.were obtained in the range of 2-800 μg/L,with their correlation coefficients being 0.999 3 and 0.999 9 resp,the RSD of migration time being 2.65% and 3.69% resp.,the RSD of peak height being 3.12% and 4.52%,resp.,and the detection limits being 0.1067 and 0.121 3 μg/ml resp.[Conclusion] This new measuring method had the characters of less sample dosage,easy operation and good sensitivity and accuracy,which provided an effective method for the analysis of the preservatives." @default.
- W2368996064 created "2016-06-24" @default.
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- W2368996064 date "2011-01-01" @default.
- W2368996064 modified "2023-09-24" @default.
- W2368996064 title "Determination on Benzoic Acid and Phthalic Acid by Micellar Electrokinetic Chromatography with Trimethylchlorosilane-coated Capillaries" @default.
- W2368996064 hasPublicationYear "2011" @default.
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