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            首頁   >>   資料下載   >>   C, S determination in pure iron samples
            
		
            
	
            
        
            
        
            
	
            
				
            
					
            
						
            
						
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            C, S determination in pure iron samples
            
        			
            閱讀：2762      發(fā)布時(shí)間：2015-05-15
        				
            
							
				
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        				  Suitable analyzers
            n CS-800
            n CS-2000 (induction furnace)
            Used accessories
            n Ceramic crucibles (90150)
            n Tungsten (90220)
            n Suitable calibration material (NIST or other)
            Settings
            n Comparator level: 10 mV
            (low C, S Channel only)
            n Minimum time: 45 sec
            n Maximum time: 3:00 min
            n Integration delay: 6 sec
            n Post-waiting: 10 sec
            n Pre-purging: 15 sec
            n Base line deviation: 5 mV
            Base line time: 30 sec
            n T1 - Pre-purging: 5 sec
            n T2 - Chamber only: 5 sec
            n T3 - Chamber and lance: 1 sec
            n T4 - Generator: 40 sec
            Sample preparation
            Make sure that the surface of the pure iron is free from contaminations;
            otherwise clean the sample with acetone p.a. and let dry at atmosphere.
            Pre-heat the crucibles at least 1 h at 1000°C ; let the crucibles cool down
            in an exsiccator.
            Procedure
            n Prepare ELTRA analyzer (e.g. exchange anhydrone, sodium hydoxide,
            copper oxide when necessary); clean the combustion tube, brush, heating
            shield, dust trap
            n Run three warm up samples (e.g. steel samples (92400-3050) with a
            minimum weight of 500 mg; add 1.5 g tungsten)
            n Calibrate the analyzer with suitable calibration material (NIST or other)
            (1) Weigh in approx. 500 mg of sample in the ceramic crucibles (90150)
            (2) Add 1.7 (±0.1 g) of tungsten (90220)
            (3) Place the crucible on the pedestal and start analysis
            Repeat step (1) - (3) at least three times;
            Mark the results and use the calibration function in the software.

            
                        
            
                            
            
                                
                                    
            
                                        
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                                        弗爾德（上海）儀器設(shè)備有限公司
                                        
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