1. Accurate determination of residual acrylic acid in superabsorbent polymer of hygiene products by headspace gas chromatography.
- Author
-
Zhang SX, Chai XS, and Jiang R
- Subjects
- Absorption, Physicochemical, Carbon Dioxide analysis, Chromatography, Gas methods, Hygiene, Acrylates analysis, Acrylic Resins chemistry
- Abstract
This work reports on a method for the determination of residual acrylic acid (AA) in the superabsorbent polymers for hygiene products by headspace analysis. It was based on water extraction for the polymer sample at a room temperature for 50min. Then, the AA in the extractant reacted with bicarbonate solution in a closed headspace sample vial, from which the carbon dioxide generated from the reaction (within 20min at 70°C) was detected by gas chromatography (GC). It was found that there is adsorption partition equilibrium of AA between solid-liquid phases. Therefore, an equation for calculating the total AA content in the original polymers sample was derived based on the above phase equilibrium. The results show that the HS-GC method has good precision (RSD<2.51%) and good accuracy (recoveries from 93 to 105%); the limit of quantification (LOQ) was 373mg/kg. The present method is rapid, accurate, and suitable for determining total residual acrylic acid in a wide variety of applications from processing of superabsorbent polymer to commercial products quality control., (Copyright © 2017 Elsevier B.V. All rights reserved.)
- Published
- 2017
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