Determination of sulfur in soil, stream sediment and ore by high frequency infrared carbon sulfur meter
Ye Man, Zhang Hua, Li Xiang, Ke Yan
Xi' an Northwest Geological Institute of Nonferrous Metals Co., Ltd., Xi' an 710043, China
摘要：应用高频红外碳硫分析仪对土壤、水系沉积物、镍矿石及铅锌矿石样品中的硫含量进行测定。通过优化样品称样质量和助熔剂添加量，建立了适合分析不同样品中硫含量的最佳方法：氧气流量为2.8 L/min，土壤和水系沉积物等低硫含量样品称样质量为0.050 g，镍矿石和铅锌矿石等高硫含量样品称样质量为0.030 g，纯铁助熔剂添加质量为0.5 g，纯钨助熔剂剂添加质量为2.0 g。用国家标准物质验证了该方法的精密度和准确度，测定结果的相对标准偏差小于5.0%（n=7），测定值与标准值的相对误差绝对值小于10%，检出限为0.00021%。该方法能准确测定不同基体样品中硫的含量，适合批量样品测定。
Abstract：The sulfur content in soil, stream sediment, nickel ore and lead-zinc ore was determined by high frequency infrared carbon sulfur analyzer. The optimum method for the analysis of sulfur content in different samples by optimizing the sample weight and the flux addition amount was established as follows: oxygen flow was analyzed by keeping 2.8
L/min; the mass of sample with low sulfur content such as soil and river sediment was 0.050 g, and that with high sulfur content such as nickel ore and lead-zinc ore was 0.030 g; the added mass of pure iron flux was 0.5 g, and that of pure tungsten flux was 2.0 g. The precision and accuracy of the method were verified with the national standard materials, the relative standard deviation of the measured results was less than 5.0%(n=7), and the relative error between the measured values and the standard values was less than 10%, the detection limit was 0.000㈠1%. The method can accurately determine the sulfur content in different matrix samples, and it is suitable for batch sample determination.
Keywords：high frequency combustion infrared absorption method; sulfur content; soil; stream sediment; ore
Ye Man，Zhang Hua，Li Xiang，et al. Determination of sulfur in soil，stream sediment and ore by high frequency infrared carbon sulfur meter[J]. Chemical Analysis and Meterage，2021，30(6)：48.