Rapid determination of molybdenum in alloy steels by atomic-absorption spectroscopy in a nitrous oxide-acetylene flame

The Analyst ◽  
1966 ◽  
Vol 91 (1088) ◽  
pp. 700 ◽  
Author(s):  
G. F. Kirkbright ◽  
A. M. Smith ◽  
T. S. West
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Rapid Determination ◽  
Alloy Steels

The Application of Atomic Absorption Spectroscopy on Detection of Engine Crankshaft Bearing Abnormal Sound

2012 ◽  
Vol 496 ◽  
pp. 427-430
Author(s):  
Li Dan Chen
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Rapid Determination ◽  
Lubricating Oil ◽  
Main Metal ◽  
Abnormal Sound ◽  
Metal Contents ◽  
Engine Crankshaft

By now, it is hard for an effective determination of the engine abnormal sound according to the existing auscultation method based on human experiences and diagnosis aided by instruments. For this reason, the author presented an innovative method that was by the using of atomic absorption spectroscopy technology for a rapid determination of the engine crankshaft bearing abnormal sounds. Major metals contents (Cu and Pb) in 20 batches of Audi A6 engine lubricating oil were detected by atomic absorption spectrometry. Samples were taken from the oil of mileages from 5000km to 69000km and 3000km intervals. Then the databases of main metal contents of different driving miles were built within the same vehicle type. This study showed that the main metal contents were fluctuating with the increasing of driving miles within certain range. For the practical application, we built a connection between engine abnormal sound faults and the major metal contents in the engine lubricating oil. By comparing the metal contents in problem engine with the established contents changing trends chart, we could get a rapid determination about the engine abnormal sound fault without disintegration of the car. To sum up, the achievements of this study helped to reduce vehicle maintenance costs and improved the fault diagnosis accuracy in abnormal sound of engine crankshaft bearing.

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