The temperature of the sample grinded by the spectral grinding prototype is easy to be too high,which affects the detection of S element in varying degrees.Al2O3 grinding wheel sheet will affect the detection accuracy of Al and Ca.The sample milled by automatic milling machine has no influence on all kinds of elements,and the elements detected have good repeatability.The sample of automatic milling machine overcomes the difficult problem of large error caused by different grinding methods of different inspectors.At the same time,the sample preparation efficiency is high,the safety is high,and there is no fine iron filings,energy saving and environmental protection.
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