二氧化氯的测定

对应用碘量法、直接分光光度法和联邻甲苯胺法测定二氧化氯的方法、特性及适用范围进行的研究表明，碘量法主要用于二氧化氯临时标准溶液的标定；直接分光光度法适用于测定二氧化氯发生器出口含量，控制现场投加量；联邻甲苯胺法则可满足常规的水质检验的要求。     

应用RF-540型荧光分光光度计检测水中硒的研究

目前在哈局管内的水质检测项目中，水中硒含量的检验是一项空白。硒元素的含量与人体的生长发育有很大的关系，但是过量的硒能引起中毒，使人产生脱毛、脱甲、四肢发麻、甚至偏瘫等症状。为了填补此项工作的空白，也为哈局管内水中硒元素含量提供-可靠的科学数据，我们采用了RF-540型荧光光度法来检测水中硒的含量，并为此进行了探讨。     

分光光度法测定混合气体中的丙烯醛

本文研究了色氨酸分光光度法测定丙烯醛的性能。对方法的检出限及加标回收率、样品的贮存时间与回收率的关系等做了详细考察,并对混合气体中的丙烯醛进行了测定,考察了甲醛、乙醇、丁酮、正丙醇、苯、甲苯、二甲苯等有机物对该方法的检测影响。     

兴多偶氮氯膦I与镁反应分光光度法试验

兴多偶氮氯膦I是一种新颖的测定镁的显色剂，与过去使用的显色剂相比，具有与镁反应抗干扰能力强，稳定性好，灵敏度高显色快，操作简便的优点。     

微波消化-氢化物原子荧光光度法测定食品中硒

目的应用微波消化技术处理样品,用氢化物原子荧光光度法测定食品中硒的含量。材料与方法自动聚焦微波消化系统和双道原子荧光光谱仪。结果方法回收率为86.4% ~107.6%,方法最低检出限为0.12μg L。结论方法灵敏度较好,回收率高,操作简便,快速,可以满足食品分析要求;使用微波消化技术对样品进行前处理,试剂用量少,消化完全,空白值低,是一项全新的样品前处理技术。     

Normal and reverse flow injection-spectrophotometric determination of thiamine hydrochloride in pharmaceutical preparations using diazotized metoclopramide

Simple and sensitive normal and reverse flow injection methods for spectrophotometric determination of thiamine hydrochloride (THC) at the microgram level were proposed and optimized. Both methods are ...     

Spectrophotometric detection of diethylstilbestrol on the basis of the plasmon resonance absorption of silver nanoparticles

In this study, a spectrophotometric detection method for diethylstilbestrol (DES) was proposed by reducing silver nitrate (AgNO3) to obtain silver nanoparticles (AgNPs) in the medium of ammonia and sodium hydroxide. It was found that the resulting AgNPs have plasmon resonance absorption (PRA) characteristic at 415 nm, and the PRA is proportional to the increase of DES concentration in the range of 4.0×10-8-1.0×10-5M with the detection limit (3σ) of 1.2×10-7M. Most of the coexisting substances at high concentrations did not affect the detection of real samples, such as tablets. The recovery was in the range of 96.01%-107.41% and the RSD was lower than 4.7%. This method can be successfully applied to control preparation quality of DES.     

用火焰原子吸收法测定易切削钢中的含钙量

试样用非氧化性酸溶解,加入磺基水杨酸作干扰抑制剂,然后应用原子吸收分光光度法中的标准加入法测定易切削钢中的含钙量。