浏阳海泡石酸和热处理 Ⅰ.表面积和孔容的改变

本文用不同的酸(HCl,HNO_3,HAC)对湖南浏阳永和海泡石矿进行处理,经X—衍射定量分析样品,证实海泡石含量均比原矿有很大的提高,变化最大的是经HAC处理的样品,含量由原矿的23.4%提高到71.3%.测定样品的比表面和比孔容,均比同温时原矿的比表面和比孔容增大,其中变化最大的比表面由104m~2/g(原矿)增至281m~2/g(HCl酸处理样品),比孔容由0.189ml/g(原矿)增至0.625ml/g(HNO_3处理样品)。各种酸处理样品,分别在160°～900℃热处理后,比表面和比孔容均随温度升高而降低。     

紫外分光光度法测定食品中的色氨酸

本文就紫外分光光度法测定食品中的色氨酸的最适条件及方法的可靠性进行了探讨,并对部分食品中的色氨酸的含量进行了测定。     

荧光猝灭法测定草酸的研究

首次报道了用高灵敏荧光粹来法测定草酸的新方法，在锆（ＩＶ）－槲皮素的体系中１．５ｍｌ２ｍｏｌ／ＬＨＣｌ存在下，草酸的加入使此体系荧光猝灭，用此法可以测定草酸的含量。     

薄层扫描法测定茶皂素中皂甙的含量

本法用高效薄层色谱对皂素中的皂甙成分进行了分离，以除运送晨皂甙类成分的干扰，在不经显色的情况下，直接进行紫外扫描测定，从而大大降低了测定误差，且在数小时内无明显变化，此法重现性好，回收率高，结果准确，稳定，明显优于目前的其它各种分析方法。     

鹿蹄草中化学元素含量的测定

报道了对鹿蹄草叶和根茎中１４种化学元素的测定结果。结果表明，鹿蹄草叶中化学元素的含量高于根茎，叶中富含Ｍｇ，Ｃａ，Ｆｅ，Ｚｎ，Ｐ５种化学元素，这些化学元素在人体中起着非常重要的作用。     

止血敏的分光光度测定法

本实验采用分光光度法制定止血敏的含量，具有操作简便。快速、试剂简单、仪器常见、重境性好等优点，便于应用推广，且是敏度较高，可用于临床血药浓度的分析。     

Dating recent lake sediments using spheroidal carbonaceous particle （SCP）

Dating lake sediment using sedimentary event is the supplement and calibration to traditional dating by radionuclide such as ^210Pb and ^137Cs. Based on the change of spheroidal carbonaceous particle (SCP) concentration, the age sequence of lake sediments can be deduced. It is one of the dating methods using sedimentary event. SCP is formed from combustion of fossil fuel at high temperature up to1750℃ and at a rate of heating of approaching 104℃/s. It can be dispersed to several hundred kilometers away from its source and deposited with precipitation or dryly deposited, and kept in sediments. Compared with Cs or Pb, there is no evidence for SCP that it decays in lake sediments and is unremovable once stored except by physical disturbance because it is mainly composed of element carbon. Handy method to extract, identify and calculate has been developed. Although fossil fuel has been used early in China, combustion at high temperature started later since emergence of electricity generation. The productivity of SCP is positively related with the generated thermal power, which is reflected as the SCP concentration in lake sediments increases with the increase of generated thermal power. Therefore, reliable sediment markers from the start of the SCP record and the remarkable variation can be used for dating purpose. In China, electricity industry started from the 1950s, and rapid increase of generated power took place since 1978. Based on these time markers, SCP time sequences of lake sediment cores LH and LL-4 from Longgan Lake, the middle reach of the Yangtze River, have been established, which is comparable with the results from ^137Cs and ^210pb, and has eliminated the errors of dating using ^137Cs and ^210pb.     

“氨羧络合剂”及其在分析化学上的应用

近年来,在化学中,特别是在分析化学领域,新型的络合剂——"氨羧络合剂"(以下简称[κ])得到了广泛的应用.[κ]已有廿年的历史,但在前期,[κ]仅作为水的较化剂,如乙二胺——N,N,N,N’——四乙酸的四钠鉴就是软化水的最好工具[1];后来逐渐用之于分析化学;并且合成了一系列的[κ],在[κ]用于分析化学的工作中,必须提及 G.Schwarzenbach 和 R.Pibil 等著名的科学家.