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Simultaneous Determination of Zirconium and Hafnium by Dual System and Dual Wavelength Spectrophotometry张贵珠,刘蜀利,杨万龙,何锡文,史慧明摘 要:<正> A dual system and dual wavelength spectrophotometry(DSDWS)used to simultaneously determine Zrand Hf were proposed.
Catalytic Spectrophotometry for Vanadium Determination Based on Oxidation of Arsenazo Ⅲ by Bichromate何荣桓,王建华摘 要:IntroductionThedeterminationoftracevanadiumreceivedextensiveatentionbecauseofitsincreasingimportanceinbiochemicalandenvironm...关键词:......
Dual-wavelength dual-indicator catalytic kinetic spectrophotometry for determination of trace Ru(Ⅲ)Hai-Yan Chen1,2,Yu-Jing Chen3,Ming Zhang11. School of Chemistry and Chemical Engineering, Yangzhou University2. Department of Chemical Engineering, Yangzhou Polytechnic Institute,Yangzhou 225127, China3. School of Chemistry and Materials Science, Ludong University摘 要:
Kinetic Investigation of Ce,Y-CPAmA Systems and Simultaneous Determination of Sc,Y,Ce via Complementary Tristimulus Spectrophotometry成荣明,赵泓,卓宗亮摘 要:<正>In the past ten years the eomplementary tristimulus speetrophotometryll],eTs,has seen its diverse appli-eations{2一61 though most researehes remain in relatively simpe systems,and less work has been......
Micellar sensitized catalytic kinetic spectrophotometry for highly accurate and reproducible determination of Ⅴ(Ⅳ) and Ⅴ(Ⅴ)Ramazan Grkan,Can EmektasDepartment of Chemistry,Faculty of Sciences,University of Cumhuriyet摘 要:A highly accurate and reproducible micellar sensitized kinetic method was proposed for determination of V(VI). The method is based......
高碘酸盐光度法测定磷铁中锰王振坤1,陈焱2,李异1,王建1,姚传刚2,王虹2,张辉2,胡德新2,王昊云2(1.天津市天津出入境检验检疫局 化矿金属材料检测中心2.天津出入境检验检疫局 化矿金属检测中心,天津 300456)摘 要:采用硝酸,氢氟酸,硫磷混酸处理磷铁样品,高碘酸盐光度法测定磷铁中的锰.实验确定了溶样酸体系,优化选择了525 nm作为测定波长,探讨了酸度和共存元素的影响.结果表明,基体中的Fe和P对测定影响不大,硫酸(1+1),磷酸(1+1)加入量在20 mL以内时的干扰也可忽略不计.方法的检出限为......
硅钼蓝分光光度法测定三氧化二砷中二氧化硅谢辉1,赖心1,黄葡英1(1.广东省广州市广州有色金属研究院分析测试中心)摘 要:研究了在三氧化二砷中加入盐酸,加热除砷,所得残渣用氢氧化钠溶解,硝酸酸化后,以钼酸铵为显色剂,在pH 0.9条件下,硅与钼酸盐形成硅钼黄络合物,用硫酸提高酸度,以抗坏血酸为还原剂,使硅形成稳定的硅钼蓝络合物,采用分光光度法测定其中的二氧化硅含量.硅钼蓝络合物最大吸收波长位于813nm处.本法相对标准偏差(RSD)为1.6%~1.9%(n=6),测定结果与ICP-AES法的结果相一致.
分光光度法测定多晶硅中铁和铝何发林1,陈文辉2,罗学涛2,陈朝0(1.福建省厦门市厦门大学 物理与机电工程学院2.厦门大学 材料学院,福建厦门 361005)摘 要:将多晶硅(硅粉)用氢氟酸和硝酸二次溶解,用高氯酸的二次冒烟去除氟离子对铝的干扰,用3 cm的比色皿解决铁低灵敏度带来的误差大的问题.使用分光光度法准确测定多晶硅中铁和铝的含量.研究了显色条件对显色反应的影响,确定最佳实验条件.结果表明,在pH3~5的乙酸-乙酸钠缓冲溶液中,铁与5 mL 0.25 g/L的1,10-二氮杂菲10 min后生成稳定的红......
二溴对甲偶氮羧光度法测定Cu-Co合金中钴钟国秀1,杨浩义1,晏高华1(1.湖北省武汉市湖北省机电研究设计院)摘 要:研究了显色剂二溴对甲偶氮羧与钴的显色反应.pH 10.2的柠檬酸铵-氨水溶液中,钴与二溴对甲偶氮羧反应形成蓝色络合物,最大吸收波长为660 nm,表观摩尔吸光系数为1.77×104 L·mol-1·cm-1,钴量在0~3.2 mg/L范围内符合比尔定律.方法用于Cu-Co合金中钴的测定,相对标准偏差小于2%,结果与亚硝基R盐光度法一致.关键词:钴; 二溴对甲偶氮羧; Cu-Co合金......
硝酸银光度法测定工业硫酸锌中痕量砷江秋月1(1.广东省韶关市广东韶关冶炼厂)摘 要:以聚乙烯醇为介质,硝酸银为显色剂,在乙醇体系中,采用分光光度法测定了工业硫酸锌中痕量砷.在1.8~3.6mol/L酸度下,硫酸锌中砷被锌粒还原成砷化氢气体逸出,用硝酸银-聚乙烯醇-乙醇溶液作为砷化氢的吸收剂,砷化氢将硝酸银还原成单质胶态银,在聚乙烯醇的作用下显黄色,其最大吸收峰位于400nm波长处,表观摩尔吸光系数为2.2×105 L·mol-1·cm-1,砷的质量浓度在0~0.6mg/L范围内符合比尔定律.方法用于工业硫酸锌样......