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Quantification of volatile compounds...

Sepcic, Kelly H.

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Quantification of volatile compounds in degraded engine oil.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Quantification of volatile compounds in degraded engine oil./
作者:	Sepcic, Kelly H.
面頁冊數:	135 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4908.
Contained By:	Dissertation Abstracts International64-10B.
標題:	Chemistry, Analytical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3110450
ISBN:	0496579886

Quantification of volatile compounds in degraded engine oil.
Sepcic, Kelly H.

Quantification of volatile compounds in degraded engine oil. - 135 p.

Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4908.

Thesis (Ph.D.)--Georgia Institute of Technology, 2003.

The objective of this work was to develop an innovative method to quantify the volatile compounds present in the gas phase above engine oil. Evaluation of these compounds would allow identification of the signature compounds that could serve as a fingerprint to determine when automobile engine oil should be changed. The ultimate goal of this research is to develop an on-board sensor to determine when engine oil should be changed. Engine oil proved to be an extremely complex mixture, and unburned gasoline, known as 'blow by', made it difficult to find one method to determine the levels of degradation compounds. It was necessary to analyze both the liquid and gas phases of the used engine oil; both phases contributed different and complementary information.

ISBN: 0496579886Subjects--Topical Terms:

586156
Chemistry, Analytical.

Quantification of volatile compounds in degraded engine oil.
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245 1 0 $a Quantification of volatile compounds in degraded engine oil.
300 $a 135 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4908.
500 $a Director: Jiri Janata.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2003.
520 $a The objective of this work was to develop an innovative method to quantify the volatile compounds present in the gas phase above engine oil. Evaluation of these compounds would allow identification of the signature compounds that could serve as a fingerprint to determine when automobile engine oil should be changed. The ultimate goal of this research is to develop an on-board sensor to determine when engine oil should be changed. Engine oil proved to be an extremely complex mixture, and unburned gasoline, known as 'blow by', made it difficult to find one method to determine the levels of degradation compounds. It was necessary to analyze both the liquid and gas phases of the used engine oil; both phases contributed different and complementary information.
520 $a A method was developed to extract water-soluble acidic degradation products from the liquid phase. There were no previous reports about such methodology in the literature. The aqueous alkaline fraction was analyzed with gas chromatography/mass spectrometry (GC MS) in the liquid phase.
520 $a To assist in determining the degradation products of engine oil, new and used oils were analyzed by FTIR. This approach afforded supporting information that the liquid phase contained oil-soluble degradation products that could not be easily identified in the gas phase.
520 $a To analyze the gas phase of the used engine oils, a novel methodology was developed using both quadrupole and time of flight mass spectrometry. Although the use of a quadrupole was previously reported in the literature, it was not quantitative. The newly developed method described in this thesis incorporated an internal standard for direct comparison to known standards for both semi and full quantification of signature compounds. No literature had reported the use of time of flight mass spectrometry to determine the degradation process of engine oil.
520 $a The volatile organic compounds (VOCs) in the vapor phase and in the liquid-phase of the engine oil were analyzed using a principal component analysis (PCA). A variety of compounds were grouped together, and were sufficient to explain the variability in the data. Engine oil samples were obtained from passenger car lubricant samples obtained up to 35,500 miles. No previous research had used PCA for the evaluation of used engine oils. The PCA yielded prioritized sets of signature data according to the volatility of the components. The main signature compound identified by the extraction from the oil was benzoic acid. Benzoic acid was also found in the headspace but at relatively lower abundance than the more volatile alkyl substituted aromatic compounds.
520 $a A method using a sensor array was developed to discriminate between new and used oils. (Abstract shortened by UMI.)
590 $a School code: 0078.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Engineering, Petroleum. $3 1018448
650 4 $a Engineering, Automotive. $3 1018477
690 $a 0486
690 $a 0765
690 $a 0540
710 2 0 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 64-10B.
790 1 0 $a Janata, Jiri, $e advisor
790 $a 0078
791 $a Ph.D.
792 $a 2003
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