Determination of trace amounts of silver(I) in the presence of an activator with a kinetic method

来源 :Rare Metals | 被引量 : 0次 | 上传用户:zonghuidiannao
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A simple and sensitive kinetic-spectrophotometric method was developed for the determination of trace amounts of silver, based on its catalytic effect on the oxidation of azocarmine G by peroxydisulfate in sulfuric acid medium and at 30 °C in the presence of 1,10-phenantroline as activator. The absorbance was measured at 525 nm with the fixed-time method. The optimization of the operating conditions regarding concentrations of the reagents, temperature, ionic strength, and interferences was also investigated. The calibration curve is linear over the concentration range 0.3–50.0 ng ml-1of silver with good precision and accuracy, and the detection limit is down to0.125 ng ml-1. The relative standard deviation for a standard solution of 25.0 ng ml-1of silver is 1.36 %(n = 10).The proposed method proves to be highly sensitive,selective, and relatively rapid for the assay of silver at lowlevel range of 0.3–50.0 ng ml-1without any pre-concentration and separation step. The method was applied for the determination of silver in river water and white photographic film. The analytic results of the real samples are in excellent agreement with atomic absorption spectrometry analysis. The analytical results obtained are satisfactory. A simple and sensitive kinetic-spectrophotometric method was developed for the determination of trace amounts of silver, based on its catalytic effect on the oxidation of azocarmine G by peroxydisulfate in sulfuric acid medium and at 30 ° C in the presence of 1,10-phenantroline The absorbance was measured at 525 nm with the fixed-time method. The optimization of the operating conditions with concentrations of the reagents, temperature, ionic strength, and interferences was also investigated. -50.0 ng ml-1 of silver with good precision and accuracy, and the detection limit is down to 0.125 ng ml-1. The relative standard deviation for a standard solution of 25.0 ng ml-1 of silver is 1.36% (n = 10) . The proposed method proves to be highly sensitive, selective, and relatively rapid for the assay of silver at lowlevel range of 0.3-50.0 ng ml-1 without any pre-concentration and separation step. The method was ap The analytical results of the real samples are in excellent agreement with atomic absorption spectrometry analysis. The analytical results obtained are satisfactory.
其他文献
目的了解汕头市农村2~7岁儿童的营养及贫血状况。方法以2012年1月~5月广东省汕头市581名2~7岁农村儿童作为调查对象,测量身高、体重等体格发育指标,同时抽取其静脉血检测血红蛋
应用共生菌沃尔巴克氏体Wolbachia的wsp、ftsZ和16SrDNA基因特异引物,通过PCR扩增法对采自江西省南昌、九江和赣州等3地桔园内的东方钝绥螨、江原钝绥螨、尼氏真绥螨、巴氏新
惠氏(Wyeth)公司的抗生素产品tigecycline(商品名为Tygacil)用于治疗社区获得性肺炎(CAP)的补充新药申请(sNDA)已收到美国FDA的“可获准”批件,但FDA在批件中要求公司另外提
营业税改征增值税作为我国税制改革的一项重要内容,一直以来受到广泛关注。本文将基于对“营改增”的背景分析以及它所产生的影响,分析在实行过程中将会出现的问题,最后运用
Drought is one of the major natural disasters causing huge agricultural losses annually. Regional agricultural drought risk assessment has great significance fo
随着人力资本在医院中发挥着越来越大的作用,人力资源管理逐渐成为医院的核心工作。建立一套具有医院特色的人力资源文化体系,把传统的刚性管理转向柔性管理,提升人力资源运
A facile and efficient protocol for the synthesis of sulfur substituted-cyclopyrophosphate of cIDPRE(P_S~1-cIDPRE) was developed.The key step was the cyclizatio
以含烯丙基醚的双马来酰亚胺预聚体(AE-BMI)作为苯并噁嗪(BOZ)的改性剂,采用非等温差示扫描量热(DSC)法、Kissinger法、Crane法和β-T(升温速率-温度)外推法研究了AE-BMI/BOZ
Prof.Tang Wenjun’s laboratory at the State Key Laboratory of Bioorganic and NaturalProducts Chemistry,Shanghai Institute of Organic Chemistry,Chinese Academy o
武汉市人民政府文件武政规[2013]18号各区人民政府,市人民政府各部门:为保证我市医疗保险制度顺利运行,经研究,决定对我市城镇职工大额医疗保险政策进行调整,现将有关事项通