High frequency infrared absorption method for determination of content sulfur in sulfur concentrate
The calibration curve of sulfur was plotted by standard samples of sulfur-iron ore.The curve was calibration by internal control samples.Thus,the rapid determination method of high-content sulfur in sulfur concentrate by high-frequency infrared absorption was established.The infrared carbon-sulfur analy-zer,sample size,sampling amount,combustion time and selection of flux were studied.The results showed that,the determination results of sulfur were consistent with those obtained by barium sulfate gravimetric under the selected instrumental parameters and following experimental conditions:about 0.4g of iron and 1.5g of tungsten particle were used as flux;0.05g of sample was combusted for 50 s under high-frequency in-duction.The precision test was conducted using standard sulfur concentrate sample.The relative standard deviation(RSD,n=11)was 1.4％.The propose method was applicable for the determination of sulfur con-centrate containing 10％-30％(mass fraction)of sulfur.
high frequency infrared absorption methodsulfur concentratesulfur
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