Determination of trace solvent in waxes and lubricating oils

Rawat, B. S.; Prasad, G. Giri

doi:10.1021/ac00230a058

Cited by 3 publications

(1 citation statement)

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“…Therefore, the oil requires a thinning medium namely another solvent, "B". This approach was previously reported by Peters 13 to recover as low as 0.01-1.0 ppm of volatile organic solvents from water, and later adopted by Rawat and Parsad 14 for estimating toluene and MEK in lubricating oil and waxes. However the chemical nature of the constituents of vegetable oils is different from that of waxes and lubricating oils.…”

Section: Introductionmentioning

confidence: 99%

Estimation of trace amounts of benzene in solvent-extracted vegetable oils and oil seed cakes

Masohan

Parsad

Khanna

et al. 2000

Analyst

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A new method is presented for the qualitative and quantitative estimation of trace amounts (up to 0.15 ppm) of benzene in crude as well as refined vegetable oils obtained by extraction with food grade hexane (FGH), and in the oil seed cakes left after extraction. The method involves the selection of two solvents; cyclohexanol, for thinning of viscous vegetable oil, and heptane, for azeotroping out trace benzene as a concentrate from the resulting mixture. Benzene is then estimated in the resulting azeotrope either by UV spectroscopy or by GC-MS subject to availability and cost effectiveness of the latter. Repeatability and reproducibility of the method is within 1-3% error. This method is suitable for estimating benzene in vegetable oils and oil seed cakes.

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Section: Introductionmentioning

confidence: 99%