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Measurement system analysis on the external standard using an azeotropic mixture of ethylene glycol and detailed uncertainties
Author(s) -
Ahmad Hazmi Ahmad Syafiq,
Abd Maurad Zulina,
Mohd Noor Mohd Azmil,
Nek Mat Din Nik Siti Mariam,
Idris Zainab
Publication year - 2021
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.202000929
Subject(s) - ethylene glycol , detection limit , chemistry , distillation , process engineering , reliability (semiconductor) , chromatography , analytical chemistry (journal) , ethylene , materials science , thermodynamics , physics , organic chemistry , engineering , catalysis , power (physics)
Ethylene glycol is a super commodity chemical and it has vital roles in various applications. Its co‐production with other chemicals, such as ethylene carbonate and glycerol carbonate, has promised cheaper production cost. Its quantification presents a challenge as its contaminants, such as ethylene carbonate, produce a signal‐reducing effect in flame ionized detector. The aim of this study is to evaluate external standard to quantify the composition of glycol mixture. Measurement system analysis was employed on the external standard method. Reliability of the external standard is statistically significant with low p‐values, excellent capability indices, and high F‐values. The external standard is found to have remarkable precision and trueness as both capability indices are mirroring each other. Furthermore, the capability analysis has a strong correlation with quality measurement. Based on capability indices, the limit of detection is recommended at S/N = 25 and the limit of quantification is recommended at S/N = 100 for a reliable measurement. A high degree of reliability is achieved coherently as almost all uncertainties of coefficients of variations are less than 5%. The established method was validated and successfully applied to glycol mixture at azeotropic distillation pilot plant.