Abstract：0.3 g of pure copper flux was transferred on bottom of crucible followed by adding 0.4 g of sample and 1.0 g of tungsten particles in sequence. The calibration curve was prepared with certified reference materials of steel. The determination method of sulfur in tin-zinc-lead bronze by high frequency combustion infrared absorption method was established. The results showed that the blank value should be deducted for the determination of low-content sulfur (the mass fraction of sulfur was lower than 0.01%). The influence of blank could be ignored when the mass fraction of sulfur was higher than 0.01%. The detection limit was 0.000 1%, and the low limit of determination was 0.000 3%. The sulfur standard solution prepared by certified reference material of potassium sulfate was used for method validation. It was found that the results were consistent with the theoretical values. The synthetic sample of tin-zinc-lead bronze prepared by certified reference material of red copper for spectral analysis (5#), tin particle, pure zinc and pure lead was determined according to the experimental method. The results were consistent with the theoretical values. The content of sulfur in tin-zinc-lead bronze sample was determined by the proposed method, and the relative standard deviations (RSD, n=11) were between 0.71% and 1.5%. The standard solution of sulfur was added into tin-zinc-lead bronze sample for recovery test. The recoveries were between 95% and 103%.
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ZHUANG Ai-chun. Determination of sulfur in tin-zinc-lead bronze by high frequency combustion infrared absorption method. , 2017, 37(4): 33-37.
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