橡塑保温材料中单质硫测定
Determination of elemental sulfur in rubber insulation materials
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摘要: 本文对橡塑保温材料中单质硫测定的前处理方法进行了研究.优化了样品颗粒大小、颗粒样品存放时间、萃取溶剂选择、超声萃取时间,优选出测定橡塑保温材料中单质硫的最佳条件.研究表明,取2—5 mm的颗粒0.1 g,加入7 mL乙醇萃取12 min静置后,后采用液相色谱法测定单质硫,测定结果具有良好的重现性和准确性,相对标准偏差RSD均小于3.0%,样品加标回收率为95%—105%.Abstract: In this paper, the determination of elemental sulfur in rubber insulation materials was studied. The sample particle size, storage time, extraction solvent and ultrasonic extraction time were discussed.After 0.1 g of particles of 2—5 mm were extracted for 12 min, sulfur was determined by liquid chromatography. The results showed good reproducibility and accuracy, with the recoveries of 95%—105%, and the relative standard deviation below 3%.
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Key words:
- rubber insulation materials /
- sulfur /
- pretreatment
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[1] 李军幸,张克强,季民. 分光光度法测定微生物处理含硫化合物废水中的单质硫含量[J]. 农业环境科学学报,2006,25(1):261-265. LI Y X, ZHANG K Q, JI M, et al. Spectrophotometric quantification of sulfur in sulfide-containing wastewater treated with microbial[J]. Journal of Agro-Environment Science, 2006, 25(1):261-265(in Chinese).
[2] JEROEN,WIJSMAN,HERMAN, et al. Sulfur and iron speciation in surface sediments along the northwestern margin of the Black Sea[J]. Marine Chemistry, 2001,74(4):261-278. -

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