Intermolecular interaction of paraffinic/naphthenic and aromatic hydrocarbons of mineral oils

1977 ◽  
Vol 13 (2) ◽  
pp. 105-108
Author(s):  
L. A. Bronshtein ◽  
Yu. N. Shekhter ◽  
V. M. Shkol'nikov ◽  
N. N. Sidorova
Keyword(s):  
Intermolecular Interaction ◽  
Aromatic Hydrocarbons ◽  
Mineral Oils

Improved Method for Determination of Polynuclear Aromatic Hydrocarbons in Pharmacopoeial Paraffin and Mineral Oils

1991 ◽  
Vol 74 (6) ◽  
pp. 968-973
Author(s):  
Aziz Geahchan ◽  
I Le Gren ◽  
Paul Chambon ◽  
Renee Chambon
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Aromatic Hydrocarbons ◽  
Detectable Level ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Improved Method ◽  
Fluorometric Determination ◽  
Mineral Oils

Abstract An improved method has been developed for quantitative determination of poiynuciear aromatic hydrocarbons (PAHs) in pharmacopoeial paraffin and medicinal white oil samples. This new method combines 2 liquid-liquid partition and adsorption chromatography procedures with a 2-step purification on Sephadex LH 20 and liquid chromatography with fluorometric determination. Selective elution of PAHs results in absence of background fluorescence. The minimum detectable level ranges from 0.2 ppt for benzofluoranthene isomers to 200 ppt for acenaphthene. Recoveries of PAHs added at 7 ppm varied from 92.1 to 111.4%. When a variety of medicinal white oil samples were analyzed by this improved method, 27 PAHs were identified, including 11 suspected carcinogens. Their identities were confirmed by capillary gas chromatography.

The determination of polycyclic aromatic hydrocarbons in mineral oils by thin-layer chromatography and mass spectrometry

The Analyst ◽  
1972 ◽  
Vol 97 (1160) ◽  
pp. 880 ◽  
Author(s):  
C. A. Glichrist ◽  
A. Lynes ◽  
G. Steel ◽  
B. T. Whitham
Keyword(s):  
Mass Spectrometry ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Aromatic Hydrocarbons ◽  
Mineral Oils ◽  
Polycyclic Aromatic ◽  
Layer Chromatography

The effect of some commercial pesticide carrier formulations on the germination of Pseudoaegerita matsushimae propagules

1991 ◽  
Vol 69 (1) ◽  
pp. 119-122
Author(s):  
Peter David Premdas ◽  
Bryce Kendrick
Keyword(s):  
Environmental Impact ◽  
Aromatic Hydrocarbons ◽  
Latency Period ◽  
Tween 80 ◽  
Aquatic Fungus ◽  
Mineral Oils ◽  
Commercial Pesticide ◽  
Oil Emulsions ◽  
Woodland Ponds ◽  
Initial Latency

Propagules of Pseudoaegerita matsushimae, an aero-aquatic hyphomycetous fungus commonly occurring on the surface of woodland ponds, were shown to germinate readily on moist surfaces. After an initial latency period of approximately 3 h during which less than 5% germination occurred, the ensuing 2–3 h saw 97% of all propagules germinate. This figure did not increase after 16 and 24 h. Using this information as a control, germinability was tested in many situations that simulated the application of pesticides and also their carriers. Oil emulsions or emulsifiable oil concentrates containing surfactants were up to 30% more toxic than mineral oils which did not contain such additives. The surfactant itself (Tween 80) did not significantly inhibit germination. Our initial studies indicated that aromatic carriers such as xylene or turpentine are highly toxic to Pseudoaegerita matsushimae propagules, whereas aliphatic carriers such as kerosene produce no significant reduction of germination. Key words: aero-aquatic fungus, pesticide carriers, aliphatic hydrocarbons, aromatic hydrocarbons, environmental impact.

scholarly journals Review on Quantification of Mineral Oil Aromatic Hydrocarbon (MOAH) from Cosmetics by Analytical Method

2021 ◽  
Vol 68 (2) ◽  
Author(s):  
Patel Visha Jitendrakumar ◽  
Dr. Alisha Patel
Keyword(s):  
Aromatic Hydrocarbons ◽  
Vacuum Ultraviolet ◽  
Health Hazard ◽  
Mineral Oil ◽  
Consumer Products ◽  
Proton Nuclear Magnetic Resonance ◽  
Resonance Spectroscopy ◽  
Saturated Hydrocarbons ◽  
Polycyclic Compounds ◽  
Mineral Oils

Mineral oils which consists mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH), which are largely applied in various consumer products like medicines cosmetics etc. MOAH which is potential public health hazard because it include carcinogenic polycyclic compounds. There is a rapid method for quantifying MOAH by proton nuclear magnetic resonance spectroscopy (1H qNMR) in anhydrous cosmetics. The 1H qNMR method is a good complement to the LC-GC-FID method. Another method is a simple and fast developed that uses columns packed with silver-modified silica in supercritical fluid chromatography with flame ionization and UV detection (SFC-FID/UV) for the determination of mineral oil saturated hydrocarbons (MOSH) and also mineral oil aromatic hydrocarbons (MOAH) in purified mineral oil samples. Another method which is based on gas chromatography with vacuum ultraviolet detection (GC-VUV) and relies on the spectral differences between the aliphatic and aromatic compounds in the sample. The detector provides a good selectivity for aromatics, direct quantification of the MOAH content is possible without the need for a laborious pre-separation of the mineral oil. GC-VUV method good sensitive for the analysis of all but gives highest purity mineral oils.

Sign in / Sign up

Export Citation Format

Share Document