Estimation of cresyl and xylyl contents in phosphate esters‐based fire resistance hydraulic fluids by nuclear magnetic resonance spectroscopy

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EarlyView Article

  • Published: Oct 7, 2017
  • Author: Ravindra Kumar, Sujit Mondal, Veena Bansal, Jai Narayan Pandey, Jayaraj Christopher, Gurpreet Singh Kapur, Deepak Saxena
  • Journal: Concepts in Magnetic Resonance Part A


In this work, a new analytical approach based on proton nuclear magnetic resonance spectroscopy has been optimized for the direct estimation of different phenolic components in a phosphate ester sample. In high resonance proton nuclear magnetic resonance spectrum of fire resistance hydraulic fluids, methyl protons of cresyl, xylyl, and other phosphates (ethyl, propyl, and butyl) are unambiguously distinguished by their different chemical shift and used for quantitative estimation. The developed methodology was validated by analyzing different synthetic blends prepared in lab and few fully formulated fire resistance hydraulic fluids. The methodology is fast, nondestructive, and useful for development of new products and troubleshooting.

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