微波消解／AAS在发动机曲轴轴承异响检测中的应用.pdf

第34卷第6期 光谱学与光谱分析 Vol.34.no.6.pp1683-1687 2014年6月 Spectroscopy and Spectral Analysis June ,2014 Application of Microwave Digestion /AASin Detecting Crankshaft Bearing Knock CHEN Li-dan ,ZHAO Yan-ru 1 .Zhejiang Technology Institute of Economy .Hangzhou 310018 ,China 2 .College of Biosystems Engineering and Food Science ,Zhejiang University ,Hangzhou 310028 ,China Ahstract The present study was carried out to detect crankshaft bearing knock using atomic absorption spec - trometry ( AAS)in an innovative way .Lubricating oil of MAGOTAN 2 .0 with mileage of 1000 ~28000Km and sampling interval of 1000Km changed into atomic vapor in the heat after digesting with microwave .Hollow cathode lamp made of the same element with metal content under test would radiate characteristic radiation with certain wavelength .A part of atomic vapor was launched with ground state atom after heating with graphite furnace .Concentration-absorbance working curve was finished with standard series sample after ab - sorbance was measured .Finally ,element content under test in oil was obtained based on the work curve ,Da - tabase of primary element ( Cuand Pb )content of lubricating oil in the same engi...