Sensitized effect of β-cyclodextrin on the fluorescence in the determination of carbaryl

Based on the significant enhancement of fluorescence intensity of carbaryl in inclusion complex, a spetrofluorimetdc method with high sensitivity was developed for the determination of carbaryl in aqueous solution. Under the optimum conditions, the complex had excitation and emission maxima at 278 nm and 332 nm, respectively. The linear range of the method was 7.0 ng/ml-1500 ng/ml with a detection limit of 1.2 ng/ml. The proposed method was successfully used to determine quantitativelv of carbarvl in cottonseeds.     

OH自由基及其激光诱导荧光法探测

对OH自由基在大气中的作用以及激光诱导荧光法探测环境中OH作了综述。包括：激光诱导荧光法的原理及定标技术；激光诱导荧光法测OH中的技术难点及解决这些难点所采用的技术对策，即气体膨胀技术；高频低脉冲技术；确定背景信号技术。     

荧光光度法测定亚硝酸盐的研究及应用

本文研究了亚硝酸盐与２，３－二氨基萘的缩合反应在荧光光度法中的应用，当反应体系中加入β－环糊精，体系吸收光谱明显增强，并利用该方法对水库，黄河、小清河中的亚硝酸盐含量进行了测定。     

Distribution characteristics of ammonia-oxidizing bacteria in the Typha latifolia constructed wetlands using fluorescent in situ hybridization(FISH)

A molecular biology method, fluorescent in situ hybridization（FISH）, in which the pre-treatment was improved in allusion to the media of the constructed wetlands（CW）, e.g. the soil and the grit, was used to investigate the vertical distribution characteristics of ammonia-oxidizing bacteria（AOB） quantity and the relation with oxidation-reduction potential（ORP） in the Typha latifolia constructed wetlands under three different Ioadings in summer from May to September. Results showed that the quantity of the AOB decreased in the Typha latifolia CW with the increase of vertical depth. However, the AOB quantity was 2-4 times the quantity of the control in the root area. Additionally, ORP in the rhizosphere was found to be higher than other areas, which showed that Typha latifolia CW was in an aerobic state in summer when using simulated non-point sewage at the rural area of Taihu Lake in China and small town combined sewage.     

海面溢油的荧光光谱鉴别法述评

介绍了荧光光谱技术在鉴别海面溢油中的应用和进展。根据荧光光谱的三维特性 ,分别阐述了普通荧光光谱、同步荧光扫描光谱、可变角同步扫描光谱、三维荧光光谱等不同荧光光谱的“指纹”信息特征 ,并介绍了导数荧光法、低温荧光法、磷光光谱法等辅助鉴别方法     

分光光度法测定水样中铬

在ｐＨ４．４ＨＡＣ－ＮａＡｃ缓冲介质及乳化剂ＯＰ存在下，Ｃｒ６＋与二溴羟基苯基荧光酮（ＤＢＨＰＦ）显色反应生成桔红色络合物．该络合物最大吸收位于４８２ｎｍ波长处，表现摩尔吸光系数εｍａｘ＝３．４７×１０４．络合物配位比为Ｃｒ６＋：ＤＢＨＰＦ＝２：３，Ｃｒ６＋在０－１６μｇ／２５ｍＬ范围内遵守比耳定律．方法已用于水样中微量铬的测定，结果满意．     

Aquafluor藻细胞活体分析法在三峡库区次级河流回水区Chla测定中的校准及应用

从三峡库区次级河流大宁河、小江、汤溪河及梅溪河139m回水区中段采集水样,经实验室培养后,用丙酮萃取分光光度法和Aquafluor藻细胞活体分析法测定Chla浓度.通过对Chla萃取值(y)和活体值(x)进行回归分析,得到其回归方程为y=4.15x 2.48,t检验显示回归方程具有线性.在库区次级河流139m回水区富营养化监测中,Chla模拟值与萃取值基本吻合,相对误差＜±7%,故可以采用Chla模拟值对水体富营养化程度进行评价.     

吡哆醛缩氨基硫脲的合成及其与钯的荧光反应

简介了一种新的荧光试剂吡哆醛缩氨基硫脲合在并用工外光谱、元素分析证实了其结构。     

多环芳烃的同步荧光光谱技术及其对尿样中多环芳烃的鉴别

荧光光谱技术是一种灵敏度高和选择性强的光度分析方法,特别是对广泛存在于环境中的多环芳烃类化合物(PAHs)是一种有力的痕量分析手段,但在复杂混合样品的分析中却受到不同程度的限制。1971年Lloyd提出了同步激发的想法,接着Jobn,Lloyd和Dinh等分别发表了PAH类化合物同荧光光谱技术的研究报告,Dinh使用这     

大气单颗粒物的成分、形态分析方法

显微分析方法是研究单颗粒物的形态结构的主要方法，激光微控针质谱、二次离子质谱、Raman微探针以及红外光谱是研究单颗粒物的化学组成的重要方法。