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A Sensitive Method for Determination Glycolic Acid, Mono- and Di-Chloroacetic Acids in Betaine Media Using Amino-Functionalized SBA-15 as a Sorbent and HPLC Assay |
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| Authors: | Majid Soleimani Azam Khani Elahe Moazzen Homeira Ebrahimzadeh Azam Samiei Leila Masoomi |
| Institution: | 1. Department of Chemistry, Faculty of Sciences, Imam Khomeini International University (IKIU), Qazvin, Iran 2. Department of Chemistry, Faculty of Sciences, Shahid Beheshti University, Tehran, Iran 3. Department of Instrumental laboratory, Mahde-Taban, Qazvin, Iran |
| Abstract: | In this paper, amino-modified nanoporous silica (APS-SBA-15) was synthesized as a new solid-phase sorbent for the extraction of glycolic acid, monochloroacetic acid, and dichloroacetic acid in synthetical betaine products. Octadecyl silica cartridge was used to reduce the concentration of matrix betaine. PS-Ag+ pre-treatment cartridge was applied to remove high Cl? concentration. The obtained effluent sample was passed through of the APS-SBA-15 sorbent. The effect of pH, flow rate of sample and eluent, and type and volume of the eluent were investigated and optimized. Chloroacetate and glycolate were eluted with 0.8 mol L?1 solution of HClO4 and measured by HPLC with a UV–vis detector. At optimum effective parameters, preconcentration factor of 129 was achieved in this method. The detection limits of mono- and dichloroacetic acid and glycolic acid were 13, 3.7, and 8.6 ng L?1, respectively. |
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