Abstract
Poly(ethylene glycol) nonylphenyl ether (PEG NPE) is a nonionic surfactant used widely as a detergent or industrial product, but the toxicity of nonylphenol, which is decomposed from PEG NPE, should be controlled to meet regulatory requirements. Under these situations, we plan to investigate the certified reference material in order to be able to exactly determine not only the average molecular weight but also all of the mole fractions of PEG NPE samples through the use of a well-calibrated evaporative light scattering detector coupled with high-performance supercritical fluid chromatography. In addition, experimental uncertainty was determined in accordance with the ISO's Guide to the Expression of Uncertainty in Measurement.
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