Detection of alkanolamines in liquid cement grinding aids by HPLC coupled with evaporative light scattering detector

Authors : Cheng LI, Wenfang SONG, Yubai SHI, Zhiwei QING

Pages : 430-435

View : 22 | Download : 14

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Triethanolamine insert ignore into journalissuearticles values(TEA);, triisopropanolamine insert ignore into journalissuearticles values(TIPA);, diethanol isopropanolamine insert ignore into journalissuearticles values(DEIPA); are necessary cement additives, and knowing their contents is needed for quality control and also to understand final properties of the cement. Whether it is the production of grinding aids, technical research and development or application research all involve the detection of grinding aids. This work developed a simple analytical technique for the simultaneous analysis of these alkanolamines in liquid cement grinding aids using high-performance liquid chromatography insert ignore into journalissuearticles values(HPLC); combined with evaporative light scattering detection insert ignore into journalissuearticles values(ELSD);. HPLC was conducted by an XBridge C18 column insert ignore into journalissuearticles values(with dimensions 4.6 × 250 mm and 5 μm particles); using methanol and 0.1% trichloroacetic acid as mobile elution phases. The ELSD sprayer and drift tube temperatures were 60 ºC and 90 ºC, respectively. HPLC-ELSD developed in this work demonstrated 1); high sensitivity with limits of detection for the three analytes are 0.15, 0.54, 1.04 μg/mL; 2); good linearity with correlation coefficients equal to 0.997–0.999 over the tested concentration range; 3); excellent repeatability with intra- and interday coefficient of variation insert ignore into journalissuearticles values(CV); below 2.71% and 4, satisfactory accuracy with recovery in the 95.5%–100.8% range. This novel method is a powerful, time- and costeffective tool for alkanolamine analyses and quality control.
Keywords : Diethanol isopropanolamine, triisopropanolamine, HPLC ELSD, triethanolamine, cement grinding aids