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巯基棉富集分光光度法测定石煤渣中痕量钽罗道成1,刘俊峰1(1.湖南省湘潭市湖南科技大学化学化工学院)摘 要:痕量钽(被巯基棉预富集后用分光光度法进行测定.在H2SO4介质中,Triton X-100存在下,钽(与丁基罗丹明B(BRB)发生显色反应,生成摩尔比为1∶1的稳定络合物,络合物的最大吸收波长为565 nm,表观摩尔吸光系数为1.46×105 L·mol-1·cm-1,钽的质量浓度在0600μg/L范围内符合比尔定律.经巯基棉富集后,钽的测定灵敏度可提高数倍,大量共存离子不干扰钽的测定.建立的方法应用于石......
乙酸丁酯萃取-火焰原子吸收光谱法测定矿石中痕量金单兴刚1,林云芬2(1.浙江省绍兴市绍兴平铜集团2.绍兴日月首饰集团,浙江绍兴 312000)摘 要:以乙酸丁酯为萃取剂,建立了火焰原子吸收光谱法测定矿石中痕量金的方法,讨论了矿石的灼烧温度,萃取溶液中溴化钾加入量和王水的浓度等因素的影响.结果表明,其适宜条件为控制灼烧温度为700℃,萃取溶液中溴化钾溶液(100 g/L)加入量为3.0 mL和王水浓度为20%(V/V).方法检出限为0.03μg/mL.本法用于矿石中金的测定,相对标准偏差≤6.5%,回收率在99%......
从氰渣中回收金的浮选试验研究何廷树1,张丰1,谢建宏1(1.陕西省西安市西安建筑科技大学材料科学与工程学院)摘 要:某金矿堆存的氰渣金品位为3~5 g/t,有极高再回收价值,进行了从氰渣中浮选回收金的试验研究.试验结果表明:氰渣中部分金赋存于氧化矿物中,且硫化矿氧化严重,单独使用硫化矿类捕收剂,金回收率低,采用新型氧化矿捕收剂XJD-10与丁黄药配合使用则能显著提高金的浮选指标.在磨矿细度为-200目占95%,用硫酸铜做活化剂,两种捕收剂复合使用,经一次粗选,两次精选,四次扫选浮选流程闭路试验,可获得金品位为1......
-ray photoelectron spectroscopy analysis(XPS). The results show that both galena and sphalerite have good flotability when potassium butyl xanthate is used as collector. Locust bean gum has strong......
January 2018; accepted 2 July 2018 Abstract: The effect of sodium butyl xanthate (NaBX) and dodecylamine (DDA) as combined collector on the sulphidizing flotation of copper oxide was investigated... metals such as gold, silver and iron were also found. In addition, S and P contents were not high and gangue composition was mainly SiO2. Sodium butyl xanthate (NaBX) and dodecylamine (DDA) were used......
)butyl]morpholine-2,5-dione(BMD) as starting materials. The structure and properties of poly[LA-co-(GA-alt-Lys)]/RGD were characterized by 1H-NMR, AAA, contact angel measurement, MTT experiments......
: With butyl xanthate as a collecter, the flotation behavior of jamesonite, pyrrhotite and marmatite, the depressing effects of small mercapto organic depressant (mercaptoacetic acid, mercaptoethanol......
ammonium chloride (N263 C1) , 3 decylmethyl ammonium iodide (N263 I) and 4 butyl ammonium iodide in poly (vinyl alcohol) (PVA) and chitoson (CS) were prepared. The relationship of membrane potentials......
photoelectron spectroscopy(XPS) analysis. The flotation results show that chalcopyrite and sphalerite have good flotability and it is difficult to separate them when potassium butyl xanthate is used......
) Abstract: A series of N-isopropylacrylamide (NIPAAm) copolymer gels with different hydrophilicity was prepared from NIPAAm, hydrophilic acrylamide (AAm) and hydrophobic butyl methacrylate (BMA......
