藏药材麻花艽中铜锌铁锰含量分析

采用ICP-AES法对青海省内采集的麻花艽中的铜、锌、铁、锰的含量进行了测定。结果表明,麻花艽中四种元素含量丰富,各部位含量差异较大,其中基部茎部含量较高,入药部位根部次之,为以后的开发利用提供了基础数据。     

液相色谱-电喷雾质谱法分析脂肪醇聚氧乙烯醚硫酸钠

采用电喷雾质谱(ESI/MS)技术建立了脂肪醇聚氧乙烯醚硫酸钠(AES)的烷基碳链分布、乙氧基分布及平均EO数、平均相对分子质量的测定方法;采用液相色谱-电喷雾质谱(LC-ESI/MS)测定了AES中的游离十二烷基硫酸钠(SDS)的含量。将本方法应用于实际样品的测定,并与核磁共振法测得的平均EO数进行比较,二者的测定结果相当吻合,从而验证了本法的可靠性。     

骨中铊的微波消解ICP/AES标准加入测定法

建立骨骼的微波消解和金属毒物铊的ICP/AES标准加入分析方法。取0.2g骨粉于聚四氟乙烯消解管中,加入3.0mL浓硝酸及0.5mL双氧水,进行微波消解。结束后,用2%硝酸定容至10.0mL。根据标准加入法进行ICP-AES定量分析。方法的回收率为99.4%,检出限为5.1ng/g,线性范围为5~500 ng/mL。该方法操作简便,回收率高,检出限低,线性范围宽,可多元素同时测定,结果可靠。     

Effects of Pt diffusion barrier layer on the interface reaction and electric properties of PZT film/Si (111) sample

The effects of the Pt diffusion barrier layer on the interface diffusion and reaction, crystallization, dielectric and ferroelectric properties of the PZT/Si(111) sample have been studied using XPS, AES and XRD techniques. Hie results indicate that the Pt diffusion barrier layer between the PZT layer and the Si substrate prohibits the formation of TiCx TiSix and SiO2 species in the PZT layer. The Pt barrier layer also completely interrupts the diffusion of Si from the Si substrate into the PZT layer and impedes the diffusion of oxygen from air to the Si substrate greatly. Although the Pt layer can not prevent completely the diffusion and reaction between oxygen and silicon, it can prevent the formation of a stable SiO2 interface layer on the interface of PZT/Si. The Pt layer reacts with silicon to form PtSix species on the interface of Pt/Si, which can intensify the chemical binding strength between the Pt layer and the Si substrate. To play a good role as a diffusion barrier layer, the Pt barrier layer     

About the Importance of Nanometer-Thick Intergranular Penetration in the Analysis of Liquid Metal Embrittlement

Liquid metal embrittlement (LME) of copper by liquid bismuth is investigated at 300°C. It is shown that a very rapid damage is due to the synergy between the external stress and the phenomenon of intergranular penetration (IGP). Tests of IGP, i.e. without external stress, were done at 300°C and at 600°C and have resulted in strong intergranular embrittlement due to the formation of nanometer-thick intergranular films, as measured and quantified by Auger electron spectroscopy (AES). The formation of these films is discussed with respect to apparently non-zero dihedral angles at 600°C. A general procedure based on mechanical testing and AES measurements, to check whether IGP has occurred or not, is outlined. This procedure can be seen as an alternative way to determine the wetting transition temperature. The presence of nanometer-thick films due to IGP is discussed with respect to the LME mechanisms.     

电感耦合等离子体原子发射光谱法测定中药方剂煎煮液中的微量元素

本文采用HNO3－H2O2对中药方剂煎煮液进行处理,拟定了电感耦合等离子体原子发射光谱法同时测定试样中12个微量元素的方法,选择了仪器的最佳工作条件,考察了基本效应的影响。在选定条件下,12个微量元素的检出限为0．10－5．0ng/g,相对标准偏差为0.10%-9.5%(n=10),加标回收率为85％－103％。该方法简单、快速,已用于大量样品的检测,分析结果满意。     

CID-ICP-AES用于高纯试样的分析性能

研究了CID-IP-AES用于测定高纯物质的分析性能。以高纯LiOH为对象,研究了低浓度范围内分析线的选择,标准曲线的特性,探讨了直接用于高纯物质分析的检测能力及可行性。     

CHROMATOGRAPHIC SEPERATION AND PURIFICATION OF HUMAN CHORIONIC GONADOTROPIN

ＣＨＲＯＭＡＴＯＧＲＡＰＨＩＣＳＥＰＥＲＡＴＩＯＮＡＮＤＰＵＲＩＦＩＣＡＴＩＯＮＯＦＨＵＭＡＮＣＨＯＲＩＯＮＩＣＧＯＮＡＤＯＴＲＯＰＩＮＷａｎｇＨａｉｆｅｎｇ；ＸｕＹｕｔａｉ；ＲｅｎＲｏｕｇｌｉ；ＴａｎｇＬｅｉ；ＷａｎｇＨａｉｒｅｎ（Ｄｅｐａｒｔｍｅ...     

用低功率微波热雾化器与十字交叉气动雾化器作为ICP-AES进样装置的比较

在 ICP- AES中 ,最常用来引入液体样品的方法是雾化法 .因此 ,雾化器雾化效率的高低直接影响到 ICP- AES的分析性能 [1,2 ] .目前 ,在 ICP- AES中最常用的雾化器是气动雾化器 (PN) .它的优点是简单、稳定性好 ;缺点是产生的雾滴的直径范围很宽 (一般为 1～ 50 μm) ,进样效率低 ,一般仅为 1 %～3% [3] .热雾化器是近年发展起来的一种雾化效率较高的雾化法 ,已被越来越多地用于 ICP- AES[4～ 7] .热雾化法的雾化原理与同轴气动雾化法类似 ,不同之处在于 :对于热雾化法来说 ,(1 )雾化所需的气体来自于液体样品本身而不是外加的惰性…