低／高品位氧化矿直接湿法浸出工艺探讨     

高军  段智勇  王振峰 《大众科技》2013,(8):44-47

针对高硅铁低品位天然氧化锌矿处理存在的矿浆固液分离困难、Zn浸出率回收率低等问题,试验探讨了始酸浓度、浸出温度、浸出时间、液固比等因素对高低品位氧化矿浸出率的影响。  相似文献   

原子吸收光谱法测定荸荠、莲藕、莲子中铁、锌、钙的含量     

徐春秀  蔡龙飞  林鑫 《韩山师范学院学报》2007,28(3):70-73

实验采用原子吸收光谱法测定荸荠、莲藕、莲子中的铁、锌、钙的含量,在样品处理过程中,采用湿法消化法和干法灰化法这两种处理方法进行多元素的消解,并对这两种样品处理方法的操作效果及测定结果进行比较,在本实验的条件下,铁的线性关系是0．1～5．0 mg/L,检出限为0．19 mg/L;锌的线性关系是0．2～1．0 mg/L,检出限为0．04 mg/L;钙的线性关系是0．5～14．0 mg/L,检出限为0．22 mg/L．回收率在90．6%～103．2%范围内．  相似文献   

火焰原子吸收法连续测定人发中铁、钙、锌、铜     

王觉吾  赖晓琦 《赣南师范学院学报》1993,(Z2)

本文应用空气——乙炔火焰原子吸收法连续测定人发中钙、铁、锌、铜的含量。在地区有关部门的帮助下,我们对我市100余名童发进行了上述元素的测定。测定方法的回收率为92％——107％,变异系数小于2％,结果令人满意。  相似文献   

Characterization of Zinc Carboxylates in an Oil Paint Test Panel     

《文物保护研究》2012,57(1):14-27

ABSTRACT

Zinc (carboxylate) soaps, formed by reactions between zinc oxide (ZnO) and fatty acids in a drying oil, are known to cause deterioration in the paint layers of modern and contemporary oil paintings. This study investigates zinc carboxylates that developed in an oil painting test panel designed to mimic the aging and degradation encountered in actual works of art. Following accelerated and natural aging, protrusions were noted on the surface of the test panel. A large protrusion with erupted gel features was extracted from the test panel, mounted in top view, and then cut to reveal the sample's cross section. The gel features, which resulted from the unreacted oil binder's separation from the paint matrix, facilitated zinc carboxylate formation. Using reflectance µ-FTIR and SEM-EDX analysis, the morphologies and spatial distributions of zinc carboxylates within the gel regions of the protrusion were studied. A concentration gradient of zinc within the gel material was observed in the cross-sectional view, indicating patterns of zinc carboxylate formation and migration.  相似文献   

有机电致发光薄膜的研制     

范希智  李刚正 《鞍山师范学院学报》1999,(3)

根据Abeles法测量了喔星锌的折射率为 1.6 97;利用下涉极值法代替石英晶体振荡法进行监控 ,通过真空蒸发镀制了光学厚度 (nd)为 540nm的喔星锌有机电致发光薄膜 ,说明在真空蒸发下干涉极值法监控有机电致发光薄膜的膜厚是有效的 .  相似文献