Unresolved Complex Mixture
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High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Unresolved Complex Mixture (also UCM or hump) is a feature frequently observed in gas chromatographic (GC) data of crude oils and other substances. The reason for its appearance is that GC cannot resolve and identify a significant part of the hydrocarbons in crude oils. The resolved components appear as peaks while the UCM appears as a large background/platform. In non-biodegraded oils the UCM may comprise less than 50 % of the total area of the chromatogram, while in biodegraded oils this figure can rise t...
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Unresolved Complex Mixture (also UCM or hump) is a feature frequently observed in gas chromatographic (GC) data of crude oils and other substances. The reason for its appearance is that GC cannot resolve and identify a significant part of the hydrocarbons in crude oils. The resolved components appear as peaks while the UCM appears as a large background/platform. In non-biodegraded oils the UCM may comprise less than 50 % of the total area of the chromatogram, while in biodegraded oils this figure can rise to around 90 %. UCM is also observed in certain refined fractions such as lubricating oils ( and references therein).
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