A procedure was developed for the determination of residual monomers in polycarboxylate superplasticizer (PCs) by reversed-phase high performance liquid chromatography (RP-HPLC). Four kinds of residual monomers were well separated and determined on a SinoChrom ODS-BP (C18) column with mobile phases composed of acetonitrile and phosphate buffer solution. The monomers were detected by UV detector at 205 nm and quantitatively analyzed with an external standard method. For those residual monomers, the linear response ranged from 4.0× 10-6 mol·L-1 to 2.0× 10-3 mol·L-1. The determination limit of acrylic acid, sodium methylallyl sulfonate and 2-Acrylamido-2-methylpropane sulfonic acid was 0.02× 10-5 mol·L-1, while that of methoxy-polyethylene glycol monoacrylate was 0.1 × 10-5 mol· L-1. The relative standard deviation (RSD) of high concentration samples was less than 1%, while that of the low concentration samples was between 1%-4%. The standard (additional) recovery ratio was 97.4% -104.2%.
参考文献
| [1] | Frank Winnefeld;Stefan Becker;Joachim Pakusch .Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems[J].Cement & concrete composites,2007(4):251-262. |
| [2] | K. Yamada;T. Takahashi .Effects of the chemical structure on the properties of polycarboxylate- type superplasticizer[J].Cement and Concrete Research,2000(2):197-207. |
| [3] | Feng, LD;Gao, ZT;Bian, XC;Chen, ZM;Chen, XS;Chen, WQ .A quantitative HPLC method for determining lactide content using hydrolytic kinetics[J].Polymer Testing,2009(6):592-598. |
| [4] | J. Plank;K. Pollmann;N. Zouaoui .Synthesis and performance of methacrylic ester based polycarboxylate superplasticizers possessing hydroxy terminated poly(ethylene glycol) side chains[J].Cement and Concrete Research,2008(10):1210-1216. |
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