【摘 要】
：
This paper presents a new method of deter-mining Ge in AuGe alloys by potassium iodate(KIO3)potentiometric titration when Ge(II)and Au(0)are simul-taneously red
【机 构】
：
School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650
论文部分内容阅读
This paper presents a new method of deter-mining Ge in AuGe alloys by potassium iodate(KIO3)potentiometric titration when Ge(II)and Au(0)are simul-taneously reduced from Ge(IV)and Au(III)by sodium hypophosphite rather than by distillation separation.The influences of such conditions as the reduction acidity,the dosage of sodium hypophosphite and the reduction time on the determination of Ge were studied.Ge in AuGe alloys such as AuGe12,AuGeNi12-2,AuAgGe18.8-12.5,and Au-AgGeNi43.8-6-0.2 was measured with the relative standard deviation(RSD)of 0.10％-0.31％and the recoveries of added standard Ge in sample of 99.40％-100.40％under the conditions of 0.40-0.80 mol·L-1 HC1,3.3 mol?L-1 H3PO4,15 g sodium hypophosphite,and reduction time of 40 min.The new method presented is of high accuracy in results,good stability and sensibility in end-point,and easy operation and strong selectivity of determination.
其他文献
大蒜宜生吃近年来，世界各地掀起了“吃大蒜热”，大蒜制剂的消费剧增，各种大蒜生产工艺及脱臭技术也应运而生，使人们在享受大蒜美味的同时又避免了蒜臭带来的烦脑，人们正逐步用大蒜
长期以来，我国北方居民喜食刺瘤型黄瓜。虽然刺瘤型黄瓜品种优良，外观性状好，但是其表面刺瘤明显不利于包装运输，同时不便于清洗，农药残留较重。华南型黄瓜虽然刺瘤少，但是品质不符
La1-xMgxNi28Co0.4Mn0.1Al0.2(x = 0.25,0.30,0.33)alloys were prepared by induction melting followed by annealing treatments(1,073 K)for 10 h.The structure and ele
在当前我国社会经济的不断发展下,我国对能源的开发与利用加大了重视程度,随着能源的不断减少,我国对可持续发展战略的实施提出了跟多的要求,必须减少不可再生能源的使用.在
国土资源信息是国民经济信息中不可或缺的、重要的土地信息资源,在国家经济和社会发展中具有重要的公益性、战略性和基础性作用.本文就加强国土资源信息化建设的必要性进行了
英国和加拿大的一支研究小组16日宣布,他们在加拿大地下2000多米处发现距今有30亿年的远古地下水。研究人员指出这可能是地球上最为古老的水,甚至有可能存在生命,因为水中发
如果说楼市炒家、房地产发展商是推动房价的一方,那么有能力控制地价但事实上放纵地价狂升的政府则同样责无可卸。“新八条”在地价问题上仍然保持暧昧的沉默,政府难免有“只
Tungsten nitride(WxN)thin films with good crystalline structure,high quality and relatively low resis-tivity were deposited by hot filament chemical vapor depos
在西伯利亚北部岛屿,俄罗斯科学家首次发现保存完好的猛犸象血液(这还是第一次发现猛犸血液),让复活这种已灭绝的巨兽成为一种可能.目前,这具重量在1公吨左右的猛犸象样本己