Abstract

A conventent and rapid direct infrared method for determining 4-methyl-2,6-ditertiarybutylphenol in mineral oil has been developed that uses the 2.74-micron hydroxyl band. The spectrum of the sample is recorded between 2.65 and 2.85 microns to obtain a pair of absorbances from which the phenol concentration is determined. The corresponding phenol-free oil is not needed, and no sample preparation is required when other substances containing the hydroxyl group are absent. The method is accurate to 0.01% phenol; instrument time is about five minutes.

Characterization of used mineral oil condition by spectroscopic techniques

Jarmo Vanhanen, Marcus Rinkiö, Jukka Aumanen, Jouko Korppi-Tommola, Erkki Kolehmainen, Tuula Kerkkänen, and Päivi Törmä
Appl. Opt. 43(24) 4718-4722 (2004)

Infrared optical constants of liquid palm oil and palm oil biodiesel determined by the combined ellipsometry-transmission method

C. C. Wang, J. Y. Tan, Y. Q. Ma, and L. H. Liu
Appl. Opt. 56(18) 5156-5163 (2017)

Optical properties of 4-N,N-dimethylamino-4^′-N^′-methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate crystals at terahertz frequencies

Marcel Stillhart, Arno Schneider, and Peter Günter
J. Opt. Soc. Am. B 25(11) 1914-1919 (2008)

Spectrochemical Determination of the Major Constituents of Minerals and Rocks

Aslak Kvalheim
J. Opt. Soc. Am. 37(7) 585-592 (1947)

Lidar fluorosensing of mineral oil spills on the sea surface

Theo Hengstermann and Rainer Reuter
Appl. Opt. 29(22) 3218-3227 (1990)