HPLC technique for quantitation of Chimassorb 944, and its evaluation in analysis of real and standard samples of polyolefins |
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Authors: | Mir Ali Farajzadeh Shirin Ghochi Eskandar Ali Ranji Elham Feyz |
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Institution: | (1) Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran;(2) National Petrochemical Company (NPC), Research and Technology Company, 14358 Mollasadra, Tehran, Iran |
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Abstract: | A high performance liquid chromatography (HPLC) method is presented for the determination of Chimassorb 944 in polymeric matrix.
A reversed phase column octadecyl silane (ODS) is used as a stationary phase. As a mobile phase, a mixture of THF:methanol:triethanol
amine (90:10:1.5) (v:v:w) is used. The HPLC system was equipped with an UV detector and the absorbance of the analyte was
recorded at 240 nm. In the case of polymers, 0.5 g of them along with 100 mg Irganox 1010 (for preventing oxidation of Chimassorb
944) were dissolved in boiling xylene, and then extracted with sulfuric acid 1 M four times. The extract was neutralized with
sodium hydroxide solution and the analyte was re-extracted into carbon tetrachloride and then injected to the HPLC system.
This method is an accurate and relatively fast technique for determination of Chimassorb 944 in polymers. |
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Keywords: | : HPLC polymer additive Chimassorb 944 |
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